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Bitcoin Space Heater BTU Calculator

· · 27 min read
/* ============================================ SPACE HEATER BTU CALCULATOR — D-Central Technologies “Terminal Meets Workshop” Dark Theme ============================================ */ @import url(‘https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&family=Barlow+Condensed:wght@600;700&display=swap’); .btu-calc { –bg-primary: #0D0D0D; –bg-secondary: #1E1E2E; –bg-card: #1A1A24; –bg-input: #141420; –bg-terminal: #0A0A0A; –accent: #FF6E00; –accent-glow: rgba(255, 110, 0, 0.15); –accent-glow-strong: rgba(255, 110, 0, 0.3); –accent-hover: #FF8C33; –text-primary: #E8E8E8; –text-secondary: #8A8A8A; –text-muted: #666; –border: #333; –border-light: #2A2A2A; –green: #10B981; –green-glow: rgba(16, 185, 129, 0.15); –red: #EF4444; –red-glow: rgba(239, 68, 68, 0.15); –yellow: #F59E0B; –yellow-glow: rgba(245, 158, 11, 0.15); –mono: ‘JetBrains Mono’, ‘Fira Code’, ‘Source Code Pro’, monospace; –sans: ‘Inter’, -apple-system, BlinkMacSystemFont, sans-serif; –heading: ‘Barlow Condensed’, ‘Oswald’, sans-serif; –radius: 8px; –transition: 0.2s ease; } .btu-calc { max-width: 1280px; margin: 0 auto; font-family: var(–sans); color: var(–text-primary); line-height: 1.7; -webkit-font-smoothing: antialiased; } .btu-calc *, .btu-calc *::before, .btu-calc *::after { box-sizing: border-box; } /* —- Typography —- */ .btu-calc h1 { font-family: var(–heading); font-weight: 700; font-size: clamp(1.8rem, 4vw, 2.8rem); line-height: 1.15; color: var(–text-primary); margin: 0 0 0.5em; text-transform: uppercase; letter-spacing: 0.02em; } .btu-calc h1 span.accent { color: var(–accent); } .btu-calc h2 { font-family: var(–heading); font-weight: 700; font-size: clamp(1.3rem, 3vw, 1.8rem); line-height: 1.2; color: var(–text-primary); margin: 0 0 0.6em; text-transform: uppercase; letter-spacing: 0.02em; } .btu-calc h3 { font-family: var(–heading); font-weight: 600; font-size: clamp(1.1rem, 2.5vw, 1.35rem); line-height: 1.25; color: var(–text-primary); margin: 0 0 0.5em; text-transform: uppercase; } .btu-calc p { margin: 0 0 1em; color: var(–text-primary); } .btu-calc p.secondary { color: var(–text-secondary); font-size: 0.95rem; } .btu-calc a { color: var(–accent); text-decoration: none; transition: color var(–transition); } .btu-calc a:hover { color: var(–accent-hover); text-decoration: underline; } /* —- Hero / Intro —- */ .btu-calc__hero { background: linear-gradient(135deg, var(–bg-secondary) 0%, var(–bg-primary) 100%); border: 1px solid var(–border); border-radius: var(–radius); padding: clamp(1.5rem, 4vw, 3rem); margin-bottom: 2rem; position: relative; overflow: hidden; } .btu-calc__hero::before { content: ”; position: absolute; top: 0; right: 0; width: 300px; height: 300px; background: radial-gradient(circle, var(–accent-glow) 0%, transparent 70%); pointer-events: none; } .btu-calc__hero-badge { display: inline-block; background: var(–accent); color: #fff; font-family: var(–mono); font-size: 0.7rem; font-weight: 600; padding: 4px 12px; border-radius: 3px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; } .btu-calc__hero-formula { background: var(–bg-terminal); border: 1px solid var(–border); border-radius: 4px; padding: 1rem 1.25rem; margin: 1.5rem 0; font-family: var(–mono); font-size: 0.9rem; color: var(–green); overflow-x: auto; } .btu-calc__hero-formula .comment { color: var(–text-muted); } /* —- Section Layout —- */ .btu-calc__section { background: var(–bg-secondary); border: 1px solid var(–border); border-radius: var(–radius); padding: clamp(1.25rem, 3vw, 2rem); margin-bottom: 1.5rem; } .btu-calc__section-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(–border-light); } .btu-calc__section-number { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; min-width: 36px; background: var(–accent); color: #fff; font-family: var(–mono); font-weight: 700; font-size: 1rem; border-radius: 4px; } /* —- Form Controls —- */ .btu-calc__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; } .btu-calc__grid–3 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); } .btu-calc__field { display: flex; flex-direction: column; gap: 0.4rem; } .btu-calc__field–full { grid-column: 1 / -1; } .btu-calc__label { font-size: 0.8rem; font-weight: 600; color: var(–text-secondary); text-transform: uppercase; letter-spacing: 0.06em; font-family: var(–sans); } .btu-calc__label-hint { font-weight: 400; color: var(–text-muted); text-transform: none; letter-spacing: normal; font-size: 0.75rem; } .btu-calc__input, .btu-calc__select { background: var(–bg-input); border: 1px solid var(–border); border-radius: 4px; color: var(–text-primary); font-family: var(–mono); font-size: 0.95rem; padding: 0.65rem 0.85rem; transition: border-color var(–transition), box-shadow var(–transition); width: 100%; -webkit-appearance: none; appearance: none; } .btu-calc__input:focus, .btu-calc__select:focus { outline: none; border-color: var(–accent); box-shadow: 0 0 0 3px var(–accent-glow); } .btu-calc__select { background-image: url(“data:image/svg+xml,%3Csvg xmlns=’http://www.w3.org/2000/svg’ width=’12’ height=’8′ viewBox=’0 0 12 8’%3E%3Cpath d=’M1 1l5 5 5-5′ stroke=’%238A8A8A’ stroke-width=’1.5′ fill=’none’/%3E%3C/svg%3E”); background-repeat: no-repeat; background-position: right 0.85rem center; padding-right: 2.5rem; cursor: pointer; } .btu-calc__select option { background: var(–bg-secondary); color: var(–text-primary); } .btu-calc__input-row { display: flex; gap: 0.75rem; align-items: end; } .btu-calc__input-row .btu-calc__field { flex: 1; } .btu-calc__dim-x { color: var(–text-muted); font-family: var(–mono); font-size: 1rem; padding-bottom: 0.7rem; flex: 0 0 auto; } .btu-calc__unit-toggle { display: inline-flex; border: 1px solid var(–border); border-radius: 4px; overflow: hidden; margin-left: 0.75rem; } .btu-calc__unit-btn { background: transparent; border: none; color: var(–text-secondary); font-family: var(–mono); font-size: 0.75rem; padding: 0.3rem 0.65rem; cursor: pointer; transition: all var(–transition); } .btu-calc__unit-btn.active { background: var(–accent); color: #fff; } /* —- Results —- */ .btu-calc__results { background: linear-gradient(135deg, var(–bg-secondary) 0%, rgba(30, 30, 46, 0.7) 100%); border: 1px solid var(–accent); border-radius: var(–radius); padding: clamp(1.25rem, 3vw, 2rem); margin-bottom: 1.5rem; box-shadow: 0 0 30px var(–accent-glow); } .btu-calc__results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.25rem; } .btu-calc__result-card { background: var(–bg-primary); border: 1px solid var(–border); border-radius: 6px; padding: 1.25rem; text-align: center; transition: border-color var(–transition), box-shadow var(–transition); } .btu-calc__result-card:hover { border-color: var(–accent); box-shadow: 0 0 15px var(–accent-glow); } .btu-calc__result-label { font-size: 0.7rem; font-weight: 600; color: var(–text-secondary); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.5rem; font-family: var(–sans); } .btu-calc__result-value { font-family: var(–mono); font-size: clamp(1.3rem, 3vw, 1.8rem); font-weight: 700; color: var(–accent); line-height: 1.1; } .btu-calc__result-value.green { color: var(–green); } .btu-calc__result-value.red { color: var(–red); } .btu-calc__result-unit { font-size: 0.7em; font-weight: 400; color: var(–text-secondary); margin-left: 2px; } .btu-calc__result-note { font-size: 0.75rem; color: var(–text-muted); margin-top: 0.3rem; font-family: var(–sans); } /* —- Coverage Meter —- */ .btu-calc__coverage { margin-top: 1.5rem; padding: 1.25rem; background: var(–bg-primary); border: 1px solid var(–border); border-radius: 6px; } .btu-calc__coverage-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; } .btu-calc__coverage-pct { font-family: var(–mono); font-size: 1.4rem; font-weight: 700; } .btu-calc__coverage-bar-wrap { background: var(–bg-terminal); border-radius: 4px; height: 28px; overflow: hidden; position: relative; } .btu-calc__coverage-bar { height: 100%; border-radius: 4px; transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1), background 0.3s ease; position: relative; min-width: 2px; } .btu-calc__coverage-bar::after { content: ”; position: absolute; right: 0; top: 0; bottom: 0; width: 40px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15)); } .btu-calc__coverage-markers { display: flex; justify-content: space-between; padding: 0.4rem 0 0; } .btu-calc__coverage-marker { font-family: var(–mono); font-size: 0.65rem; color: var(–text-muted); } .btu-calc__coverage-msg { margin-top: 0.75rem; padding: 0.75rem 1rem; border-radius: 4px; font-size: 0.9rem; line-height: 1.5; display: flex; align-items: flex-start; gap: 0.5rem; } .btu-calc__coverage-msg.status-good { background: var(–green-glow); border: 1px solid rgba(16, 185, 129, 0.3); color: var(–green); } .btu-calc__coverage-msg.status-warn { background: var(–yellow-glow); border: 1px solid rgba(245, 158, 11, 0.3); color: var(–yellow); } .btu-calc__coverage-msg.status-low { background: var(–red-glow); border: 1px solid rgba(239, 68, 68, 0.3); color: var(–red); } .btu-calc__coverage-msg.status-over { background: var(–accent-glow); border: 1px solid rgba(255, 110, 0, 0.3); color: var(–accent); } .btu-calc__coverage-icon { font-size: 1.1rem; flex-shrink: 0; line-height: 1.4; } /* —- Comparison Section —- */ .btu-calc__comparison { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; align-items: stretch; margin: 1.5rem 0; } .btu-calc__comp-card { background: var(–bg-primary); border: 1px solid var(–border); border-radius: var(–radius); padding: 1.5rem; text-align: center; } .btu-calc__comp-card–miner { border-color: var(–accent); box-shadow: 0 0 20px var(–accent-glow); } .btu-calc__comp-vs { display: flex; align-items: center; justify-content: center; padding: 0 1rem; font-family: var(–heading); font-weight: 700; font-size: 1.3rem; color: var(–text-muted); } .btu-calc__comp-icon { font-size: 2.5rem; margin-bottom: 0.75rem; line-height: 1; } .btu-calc__comp-title { font-family: var(–heading); font-weight: 700; font-size: 1rem; text-transform: uppercase; color: var(–text-primary); margin-bottom: 1rem; } .btu-calc__comp-row { display: flex; justify-content: space-between; padding: 0.5rem 0; border-bottom: 1px solid var(–border-light); font-size: 0.85rem; } .btu-calc__comp-row:last-child { border-bottom: none; } .btu-calc__comp-row-label { color: var(–text-secondary); } .btu-calc__comp-row-value { font-family: var(–mono); font-weight: 600; color: var(–text-primary); } .btu-calc__comp-row-value.green { color: var(–green); } .btu-calc__comp-row-value.accent { color: var(–accent); } .btu-calc__comp-highlight { margin-top: 1rem; padding: 0.75rem; border-radius: 4px; font-family: var(–mono); font-size: 0.85rem; font-weight: 600; text-align: center; } .btu-calc__comp-highlight.savings { background: var(–green-glow); border: 1px solid rgba(16, 185, 129, 0.3); color: var(–green); } .btu-calc__comp-highlight.neutral { background: var(–bg-secondary); border: 1px solid var(–border); color: var(–text-secondary); } /* —- Cost Breakdown —- */ .btu-calc__cost-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-top: 1rem; } .btu-calc__cost-card { background: var(–bg-primary); border: 1px solid var(–border); border-radius: 6px; padding: 1rem; text-align: center; } .btu-calc__cost-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(–text-secondary); margin-bottom: 0.4rem; font-family: var(–sans); } .btu-calc__cost-value { font-family: var(–mono); font-size: 1.4rem; font-weight: 700; } .btu-calc__cost-sub { font-size: 0.7rem; color: var(–text-muted); margin-top: 0.2rem; font-family: var(–sans); } /* —- Savings Banner —- */ .btu-calc__savings-banner { background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(255, 110, 0, 0.08) 100%); border: 1px solid var(–green); border-radius: var(–radius); padding: 1.5rem; text-align: center; margin: 1.5rem 0; box-shadow: 0 0 25px var(–green-glow); } .btu-calc__savings-title { font-family: var(–heading); font-weight: 700; font-size: 1rem; text-transform: uppercase; color: var(–green); margin-bottom: 0.75rem; } .btu-calc__savings-amount { font-family: var(–mono); font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 700; color: var(–green); line-height: 1; } .btu-calc__savings-period { font-family: var(–mono); font-size: 0.85rem; color: var(–text-secondary); margin-top: 0.3rem; } .btu-calc__savings-note { font-size: 0.8rem; color: var(–text-muted); margin-top: 0.75rem; line-height: 1.5; } /* —- Key Message Box —- */ .btu-calc__keymsg { background: var(–bg-terminal); border-left: 3px solid var(–accent); border-radius: 0 4px 4px 0; padding: 1.25rem 1.5rem; margin: 1.5rem 0; font-size: 0.95rem; line-height: 1.6; } .btu-calc__keymsg strong { color: var(–accent); } /* —- CTA Button —- */ .btu-calc__cta-wrap { text-align: center; margin: 2rem 0; } .btu-calc__cta { display: inline-block; background: var(–accent); color: #fff; font-family: var(–heading); font-weight: 700; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.06em; padding: 0.9rem 2.25rem; border-radius: 4px; border: none; cursor: pointer; text-decoration: none; transition: all var(–transition); box-shadow: 0 0 20px var(–accent-glow); } .btu-calc__cta:hover { background: var(–accent-hover); color: #fff; text-decoration: none; box-shadow: 0 0 30px var(–accent-glow-strong); transform: translateY(-1px); } .btu-calc__cta–secondary { background: transparent; border: 2px solid var(–accent); color: var(–accent); box-shadow: none; margin-left: 0.75rem; } .btu-calc__cta–secondary:hover { background: var(–accent); color: #fff; } /* —- Disclaimer —- */ .btu-calc__disclaimer { font-size: 0.75rem; color: var(–text-muted); line-height: 1.6; margin-top: 0.5rem; padding: 0.75rem 1rem; background: var(–bg-terminal); border-radius: 4px; border: 1px solid var(–border-light); } .btu-calc__disclaimer::before { content: ‘// ‘; font-family: var(–mono); color: var(–text-muted); } /* —- Model Comparison Table —- */ .btu-calc__table-wrap { overflow-x: auto; margin: 1.5rem 0; -webkit-overflow-scrolling: touch; } .btu-calc__table { width: 100%; border-collapse: collapse; font-size: 0.85rem; min-width: 700px; } .btu-calc__table th { border-bottom: 2px solid var(–accent); padding: 0.65rem 0.85rem; text-align: left; font-family: var(–sans); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(–text-secondary); white-space: nowrap; } .btu-calc__table td { border-bottom: 1px solid var(–border-light); padding: 0.65rem 0.85rem; color: var(–text-primary); vertical-align: middle; } .btu-calc__table tr:hover td { background: rgba(255, 110, 0, 0.03); } .btu-calc__table td a { color: var(–accent); font-weight: 600; } .btu-calc__table .mono { font-family: var(–mono); font-weight: 500; } .btu-calc__table .check { color: var(–green); } /* —- FAQ Section —- */ .btu-calc__faq { margin: 2rem 0; } .btu-calc__faq details { background: var(–bg-secondary); border: 1px solid var(–border); border-radius: 6px; margin-bottom: 0.75rem; overflow: hidden; transition: border-color var(–transition); } .btu-calc__faq details[open] { border-color: var(–accent); } .btu-calc__faq details summary { padding: 1rem 1.25rem; cursor: pointer; font-weight: 600; font-size: 0.95rem; color: var(–text-primary); list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 1rem; transition: color var(–transition); } .btu-calc__faq details summary::-webkit-details-marker { display: none; } .btu-calc__faq details summary::after { content: ‘+’; font-family: var(–mono); font-size: 1.2rem; color: var(–accent); flex-shrink: 0; transition: transform var(–transition); } .btu-calc__faq details[open] summary::after { content: ‘2212’; } .btu-calc__faq details summary:hover { color: var(–accent); } .btu-calc__faq details .faq-answer { padding: 0 1.25rem 1.25rem; color: var(–text-secondary); font-size: 0.9rem; line-height: 1.7; } /* —- Content Sections Below Calc —- */ .btu-calc__content-section { margin: 2.5rem 0; } .btu-calc__content-section p { color: var(–text-secondary); font-size: 0.95rem; line-height: 1.8; } /* —- Divider —- */ .btu-calc__divider { border: none; border-top: 1px solid var(–border); margin: 2.5rem 0; } /* —- Recommended Models —- */ .btu-calc__recommendations { margin-top: 1.5rem; } .btu-calc__rec-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; margin-top: 1rem; } .btu-calc__rec-card { background: var(–bg-primary); border: 1px solid var(–border); border-radius: 6px; padding: 1.25rem; transition: border-color var(–transition), box-shadow var(–transition); } .btu-calc__rec-card:hover { border-color: var(–accent); box-shadow: 0 0 15px var(–accent-glow); } .btu-calc__rec-card.best-match { border-color: var(–green); box-shadow: 0 0 15px var(–green-glow); } .btu-calc__rec-badge { display: inline-block; font-family: var(–mono); font-size: 0.65rem; font-weight: 600; text-transform: uppercase; padding: 2px 8px; border-radius: 3px; margin-bottom: 0.5rem; } .btu-calc__rec-badge.best { background: var(–green-glow); color: var(–green); border: 1px solid rgba(16, 185, 129, 0.3); } .btu-calc__rec-badge.good { background: var(–accent-glow); color: var(–accent); border: 1px solid rgba(255, 110, 0, 0.3); } .btu-calc__rec-badge.supplemental { background: var(–yellow-glow); color: var(–yellow); border: 1px solid rgba(245, 158, 11, 0.3); } .btu-calc__rec-name { font-family: var(–heading); font-weight: 700; font-size: 1.05rem; text-transform: uppercase; margin-bottom: 0.5rem; } .btu-calc__rec-name a { color: var(–text-primary); } .btu-calc__rec-name a:hover { color: var(–accent); } .btu-calc__rec-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.3rem 1rem; font-size: 0.8rem; margin-bottom: 0.5rem; } .btu-calc__rec-spec-label { color: var(–text-muted); } .btu-calc__rec-spec-val { font-family: var(–mono); font-weight: 500; color: var(–text-primary); text-align: right; } .btu-calc__rec-coverage { font-family: var(–mono); font-size: 0.85rem; font-weight: 600; margin-top: 0.5rem; padding-top: 0.5rem; border-top: 1px solid var(–border-light); } /* —- Province / Rate —- */ .btu-calc__rate-display { display: inline-flex; align-items: center; gap: 0.5rem; background: var(–bg-terminal); border: 1px solid var(–border); border-radius: 4px; padding: 0.4rem 0.75rem; font-family: var(–mono); font-size: 0.8rem; color: var(–text-secondary); margin-top: 0.5rem; } .btu-calc__rate-display .rate-val { color: var(–accent); font-weight: 600; } /* —- Responsive —- */ @media (max-width: 768px) { .btu-calc__comparison { grid-template-columns: 1fr; gap: 0; } .btu-calc__comp-vs { padding: 0.75rem 0; font-size: 1.1rem; } .btu-calc__input-row { flex-direction: column; gap: 1rem; } .btu-calc__dim-x { display: none; } .btu-calc__cta–secondary { margin-left: 0; margin-top: 0.75rem; } .btu-calc__cta-wrap { display: flex; flex-direction: column; align-items: center; gap: 0; } .btu-calc__savings-amount { font-size: 2rem; } } @media (max-width: 480px) { .btu-calc__results-grid { grid-template-columns: 1fr 1fr; } .btu-calc__cost-grid { grid-template-columns: 1fr 1fr; } .btu-calc__rec-cards { grid-template-columns: 1fr; } .btu-calc__rec-specs { grid-template-columns: 1fr 1fr; } } @media (max-width: 360px) { .btu-calc__results-grid { grid-template-columns: 1fr; } .btu-calc__cost-grid { grid-template-columns: 1fr; } } /* —- Animations —- */ @keyframes countUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } } .btu-calc__result-value[data-animated] { animation: countUp 0.4s ease-out; } /* —- Print —- */ @media print { .btu-calc { color: #000; } .btu-calc__section, .btu-calc__results, .btu-calc__hero { border-color: #ccc; background: #fff; box-shadow: none; } .btu-calc__result-value, .btu-calc__cost-value, .btu-calc__coverage-pct { color: #000; } }
D-Central Exclusive Tool

Bitcoin Space Heater BTU Calculator

Every watt consumed by a Bitcoin miner converts to heat. 100%. That is the first law of thermodynamics. A 1,400W ASIC miner produces exactly the same heat as a 1,400W electric space heater. The difference? The miner also earns Bitcoin while it heats your room.

Use this calculator to size the right Bitcoin Space Heater for your room, compare costs against a traditional electric heater, and see how much Bitcoin you could earn while staying warm this winter.

// The fundamental equation of Bitcoin heating
1 Watt (electric heater) = 1 Watt (Bitcoin miner) = 3.412 BTU/hr
// Same heat. Same cost. But one also mines Bitcoin.

Canadians spend $2,000+ per year on home heating. What if that money was also stacking sats? D-Central Technologies pioneered the Bitcoin space heater concept in Canada. We take proven ASIC mining hardware, re-engineer it with silent fans and custom enclosures, and deliver a plug-and-play heating appliance that also mines Bitcoin.

1

Room Heating Needs

Enter your room dimensions and conditions. We will calculate the BTU output needed to keep it comfortable.

Poor — Old house, single-pane windows, drafty Average — Standard residential insulation Good — Well-insulated, double-pane windows Excellent — New construction, triple-pane, sealed
Northern Canada (extreme cold, -30°C / -22°F) Southern Canada / Northern US (-15°C / 5°F) Central US (moderate, -5°C / 23°F) Southern US (mild, 5°C / 41°F)
2

Miner Heat Output

Select a Bitcoin Space Heater model to see its heat output and how well it covers your room.

S9 Space Heater Edition — 1,400W / 4,777 BTU/hr / 13 TH/s L3+ Space Heater Edition — 800W / 2,730 BTU/hr / 504 MH/s S17 Space Heater Edition — 1,000W / 3,412 BTU/hr / 33 TH/s S19 Space Heater Edition — 3,250W / 11,089 BTU/hr / 56 TH/s Slim Edition — 900W / 3,071 BTU/hr / 35 TH/s Loki Edition — 1,150W / 3,924 BTU/hr / 48 TH/s L7 Pivotal Edition — 1,300W / 4,436 BTU/hr / 3.5 GH/s StealthMiner — 900W / 3,071 BTU/hr / 35 TH/s BitChimney — 800W / 2,730 BTU/hr / 504 MH/s Bitaxe (any model) — ~25W / 85 BTU/hr / Supplemental only Custom Wattage — Enter your own
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Cost Comparison

See how a Bitcoin Space Heater compares to a traditional electric heater. Same heat, same electricity cost — but one also mines Bitcoin.

Quebec — $0.0376/kWh (lowest in Canada) Manitoba — $0.0575/kWh British Columbia — $0.073/kWh Newfoundland & Labrador — $0.087/kWh New Brunswick — $0.094/kWh Prince Edward Island — $0.104/kWh Saskatchewan — $0.105/kWh Alberta — $0.117/kWh Ontario — $0.13/kWh Nova Scotia — $0.146/kWh US — Low (WA, LA, WV) ~$0.08/kWh US — Average ~$0.12/kWh US — High (CA, CT, MA) ~$0.18/kWh Custom Rate — Enter your own
Using rate: $0.130/kWh
The physics are clear: A 1,400W electric heater and a 1,400W Bitcoin miner produce identical heat — 4,777 BTU/hr. The electricity cost is the same. The thermal output is the same. The only difference is that the Bitcoin miner is also performing trillions of cryptographic computations per second, earning Bitcoin with every hash. You were going to spend that electricity on heating anyway. Make it work twice.

How Bitcoin Mining Heaters Work

The science behind a Bitcoin space heater is not marketing — it is thermodynamics. When electricity flows through any resistive load, whether a ceramic heating element or a silicon ASIC chip, all of that electrical energy converts to thermal energy. This is the first law of thermodynamics: energy is conserved. A 1,500-watt device consumes 1,500 watts of electricity and produces 1,500 watts of heat, regardless of whether it is a $30 space heater from a hardware store or a $300 Bitcoin miner from D-Central.

Traditional electric space heaters convert electricity to heat through simple resistive elements. The electricity flows, the element resists, heat radiates into your room. That is the entire process. A Bitcoin ASIC miner does the same thing, but the resistance comes from billions of transistors performing SHA-256 hash computations at speeds exceeding 10 trillion hashes per second. The chips heat up. The fans push warm air into your room. And as a byproduct of that computation, the miner earns Bitcoin by contributing to the security of the Bitcoin network. Every hash is a lottery ticket for a block reward. You are heating your home and participating in the most decentralized monetary network ever created — simultaneously.

D-Central’s Space Heater Editions are purpose-built for residential use. We replace the industrial-grade fans (which can reach 80+ dB) with silent Noctua or Arctic P14 Max fans that operate at 35–45 dB — quieter than a refrigerator. We enclose the hardware in custom 3D-printed cases designed for airflow and aesthetics. We flash optimized firmware (BraiinsOS+ or Vnish) that lets you fine-tune wattage, hashrate, and fan speeds from your phone. The result is a plug-and-play appliance that heats your room, mines Bitcoin, and looks like it belongs in a modern home — not a data center.

Choosing the Right Space Heater Model

Every room is different. A 150-square-foot bedroom needs far less heat than a 400-square-foot living room. Below is a complete comparison of every D-Central Space Heater model to help you match heat output to room size.

Model Power BTU/hr Hashrate Noise Room Size Price (CAD)
S9 Space Heater 1,400W 4,777 13 TH/s ~45 dB 150–250 sq ft $235
L3+ Space Heater 800W 2,730 504 MH/s ~40 dB 80–150 sq ft $295
S17 Space Heater 1,000W 3,412 33 TH/s ~45 dB 100–200 sq ft $530
S19 Space Heater 3,250W 11,089 56 TH/s ~40 dB 350–600 sq ft $755
Slim Edition 900W 3,071 35 TH/s ~35 dB 100–175 sq ft $560
Loki Edition 1,150W 3,924 48 TH/s ~40 dB 120–225 sq ft $585
L7 Pivotal 1,300W 4,436 3.5 GH/s ~40 dB 140–250 sq ft $2,350
StealthMiner 900W 3,071 35 TH/s ~35 dB 100–175 sq ft $850
BitChimney 800W 2,730 504 MH/s ~35 dB 80–150 sq ft $540

All models include silent fan upgrades (Noctua or Arctic P14 Max), optimized firmware, and a 3D-printed enclosure. All units are assembled and tested at D-Central’s facility in Laval, Quebec. Prices in CAD. Browse the full collection.

Frequently Asked Questions

Is a Bitcoin miner really as warm as a regular space heater?

Yes. This is physics, not marketing. A 1,400-watt device produces 1,400 watts of heat regardless of whether it is a ceramic heating element or a Bitcoin ASIC chip. The first law of thermodynamics guarantees that all electrical energy consumed by any device ultimately converts to thermal energy. A Bitcoin miner at 1,400W produces exactly 4,777 BTU/hr of heat — identical to a 1,400W electric space heater. The only difference is that the miner is also performing useful computational work (mining Bitcoin) while generating that heat.

How loud are D-Central’s Space Heater Editions?

Standard ASIC miners use industrial fans that can reach 75–85 dB (louder than a vacuum cleaner). D-Central replaces these with premium silent fans — Noctua NF-A14 or Arctic P14 Max — bringing noise levels down to 35–45 dB depending on the model. For reference, a typical refrigerator runs at about 40 dB, and a quiet conversation is about 50 dB. Our Slim Edition and StealthMiner models are the quietest at approximately 35 dB. With optimized firmware, you can further reduce fan speed (and noise) by lowering the hashrate/wattage.

How much Bitcoin will I actually earn?

Mining revenue depends on several variables: your miner’s hashrate, current network difficulty, Bitcoin price, and your mining pool’s fee structure. The estimates in this calculator use current network conditions and should be treated as approximations. At today’s difficulty, an S9 at 13 TH/s will earn a modest amount of sats daily — think of it as a discount on your heating bill rather than a profit center. The S19 at 56 TH/s earns proportionally more. The key insight is that you are spending this electricity on heating regardless; the Bitcoin is a bonus that reduces your effective heating cost. Over a full Canadian winter (5–7 months of heating), those sats accumulate. And if Bitcoin’s price appreciates over time, those sats become worth more in hindsight.

Can I run a Space Heater on a standard 120V/15A household outlet?

Most of our models run on standard North American 120V outlets. The S9 (1,400W), S17 (1,000W), Slim Edition (900W), Loki Edition (1,150W), L3+ (800W), and BitChimney (800W) all draw under 1,500W and work on a standard 15A circuit. The S19 Space Heater Edition at 3,250W requires a 240V/20A outlet (like a dryer or oven outlet) — similar to what a large window AC unit or baseboard heater uses. We include the appropriate power supply and cable with every order. If you are unsure about your electrical setup, our consulting team can help you plan.

What happens in summer when I do not need heat?

You have several options. Many customers vent the hot air outside using a window adapter or dryer vent duct — similar to a portable AC unit’s exhaust. Some move the miner to a garage or basement. Others simply turn it off for the summer months and run it only during the heating season (October through April in most of Canada). With optimized firmware, you can also reduce wattage significantly, lowering both heat output and power consumption while still earning some Bitcoin. D-Central also sells shrouds and duct adapters specifically designed for venting ASIC exhaust.

Is this worth it compared to a heat pump or natural gas furnace?

A Bitcoin space heater is an electric resistance heater — the same category as baseboard heaters, ceramic heaters, and oil-filled radiators. It produces 1 watt of heat per 1 watt of electricity (COP of 1.0). Heat pumps achieve COP ratings of 2.0–4.0, meaning they move 2–4 watts of heat per watt of electricity. So a heat pump is more energy-efficient for primary whole-home heating. A Bitcoin space heater is best used as supplemental or zone heating — warming the room you are in, heating a basement, garage, or workshop, or replacing an existing electric space heater. If you are already using electric resistance heating (baseboard, portable heater, in-floor electric), a Bitcoin space heater is a direct replacement at zero additional energy cost, with the bonus of mining Bitcoin. Think of it as upgrading your existing electric heater, not replacing your furnace.

Turn Your Heating Bill Into Bitcoin

You are going to spend that electricity on heating anyway. Make it mine Bitcoin. D-Central has been pioneering Bitcoin space heaters since 2016, with every unit assembled and tested at our facility in Laval, Quebec.

Need help choosing? Book a free consultation or call 1-855-753-9997.

(function() { ‘use strict’; /* ================================================ D-Central Space Heater BTU Calculator — Engine ================================================ */ // —– State —– var state = { dimUnit: ‘ft’, // ‘ft’ or ‘m’ tempUnit: ‘F’, // ‘C’ or ‘F’ btcPrice: 130000, // CAD fallback — updated via API networkDiff: 1.145e14, // fallback — updated via API btcPriceLoaded: false }; // —– Space Heater Product Data —– var MODELS = { s9: { name: ‘S9 Space Heater Edition’, watts: 1400, btu: 4777, hash: 13, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 45, price: 235, url: ‘/product/antminer-s9-space-heater-edition/’, roomMin: 150, roomMax: 250 }, l3: { name: ‘L3+ Space Heater Edition’, watts: 800, btu: 2730, hash: 504, hashUnit: ‘MH/s’, algo: ‘Scrypt’, noise: 40, price: 295, url: ‘/product/antminer-l3-space-heater-edition/’, roomMin: 80, roomMax: 150 }, s17: { name: ‘S17 Space Heater Edition’, watts: 1000, btu: 3412, hash: 33, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 45, price: 530, url: ‘/product/antminer-s17-space-heater-edition/’, roomMin: 100, roomMax: 200 }, s19: { name: ‘S19 Space Heater Edition’, watts: 3250, btu: 11089, hash: 56, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 40, price: 755, url: ‘/product/antminer-s19-space-heater-edition/’, roomMin: 350, roomMax: 600 }, slim: { name: ‘Slim Edition’, watts: 900, btu: 3071, hash: 35, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 35, price: 560, url: ‘/product/antminer-slim-edition/’, roomMin: 100, roomMax: 175 }, loki: { name: ‘Loki Edition’, watts: 1150, btu: 3924, hash: 48, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 40, price: 585, url: ‘/product/antminer-loki-edition/’, roomMin: 120, roomMax: 225 }, l7: { name: ‘L7 Pivotal Edition’, watts: 1300, btu: 4436, hash: 3.5, hashUnit: ‘GH/s’, algo: ‘Scrypt’, noise: 40, price: 2350, url: ‘/product/l7-heater-pivotal-edition-3-5ghs-1300w/’, roomMin: 140, roomMax: 250 }, stealth: { name: ‘StealthMiner’, watts: 900, btu: 3071, hash: 35, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 35, price: 850, url: ‘/product/the-stealthminer/’, roomMin: 100, roomMax: 175 }, chimney: { name: ‘BitChimney’, watts: 800, btu: 2730, hash: 504, hashUnit: ‘MH/s’, algo: ‘Scrypt’, noise: 35, price: 540, url: ‘/product/the-bitchimney/’, roomMin: 80, roomMax: 150 }, bitaxe: { name: ‘Bitaxe’, watts: 25, btu: 85, hash: 1.2, hashUnit: ‘TH/s’, algo: ‘SHA-256’, noise: 30, price: 250, url: ‘/product-category/open-source-miners/’, roomMin: 0, roomMax: 10 } }; // —– Insulation multipliers (BTU per sq ft per degree F delta) —– var INSULATION = { poor: { factor: 0.35, label: ‘Poor’ }, average: { factor: 0.28, label: ‘Average’ }, good: { factor: 0.22, label: ‘Good’ }, excellent: { factor: 0.16, label: ‘Excellent’ } }; // —– Climate zone default outdoor temps (F) —– var CLIMATE_DEFAULTS_F = { extreme: -22, cold: 5, moderate: 23, mild: 41 }; // —– Fetch BTC price and difficulty —– function fetchBtcData() { // Try CoinGecko for CAD price fetch(‘https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=cad’) .then(function(r) { return r.json(); }) .then(function(data) { if (data && data.bitcoin && data.bitcoin.cad) { state.btcPrice = data.bitcoin.cad; state.btcPriceLoaded = true; calculate(); } }) .catch(function() { // Use fallback price }); // Fetch network difficulty from mempool.space fetch(‘https://mempool.space/api/v1/mining/hashrate/1m’) .then(function(r) { return r.json(); }) .then(function(data) { if (data && data.difficulty && data.difficulty.length > 0) { var latest = data.difficulty[data.difficulty.length – 1]; if (latest && latest.difficulty) { state.networkDiff = latest.difficulty; calculate(); } } }) .catch(function() { // Fallback to mempool difficulty API fetch(‘https://mempool.space/api/v1/difficulty-adjustment’) .then(function(r) { return r.json(); }) .then(function(data) { if (data && data.difficultyChange !== undefined) { // Keep existing fallback if this doesn’t give raw difficulty } }) .catch(function() {}); }); } // —– Unit conversion helpers —– function ftToM(ft) { return ft * 0.3048; } function mToFt(m) { return m / 0.3048; } function cToF(c) { return (c * 9/5) + 32; } function fToC(f) { return (f – 32) * 5/9; } // —– DOM helpers —– function $(id) { return document.getElementById(id); } function show(id) { $(id).style.display = ”; } function hide(id) { $(id).style.display = ‘none’; } function val(id) { return parseFloat($(id).value) || 0; } function setText(id, text) { $(id).textContent = text; } function setHTML(id, html) { $(id).innerHTML = html; } function formatNum(n, decimals) { if (decimals === undefined) decimals = 0; return n.toLocaleString(‘en-US’, { minimumFractionDigits: decimals, maximumFractionDigits: decimals }); } function formatCurrency(n) { if (n < 0) return '-$' + formatNum(Math.abs(n), 2); return '$' + formatNum(n, 2); } // —– Toggle dimension unit —– window.setDimUnit = function(unit) { var btns = $('dimUnitToggle').querySelectorAll('.btu-calc__unit-btn'); btns.forEach(function(b) { b.classList.toggle('active', b.getAttribute('data-unit') === unit); }); var lengthEl = $('roomLength'); var widthEl = $('roomWidth'); var heightEl = $('roomHeight'); if (unit !== state.dimUnit) { if (unit === 'm') { if (lengthEl.value) lengthEl.value = (parseFloat(lengthEl.value) * 0.3048).toFixed(1); if (widthEl.value) widthEl.value = (parseFloat(widthEl.value) * 0.3048).toFixed(1); if (heightEl.value) heightEl.value = (parseFloat(heightEl.value) * 0.3048).toFixed(1); lengthEl.placeholder = '4.6'; widthEl.placeholder = '3.7'; heightEl.placeholder = '2.4'; } else { if (lengthEl.value) lengthEl.value = (parseFloat(lengthEl.value) / 0.3048).toFixed(1); if (widthEl.value) widthEl.value = (parseFloat(widthEl.value) / 0.3048).toFixed(1); if (heightEl.value) heightEl.value = (parseFloat(heightEl.value) / 0.3048).toFixed(1); lengthEl.placeholder = '15'; widthEl.placeholder = '12'; heightEl.placeholder = '8'; } } state.dimUnit = unit; calculate(); }; // —– Toggle temperature unit —– window.setTempUnit = function(unit) { var btns = $('tempUnitToggle').querySelectorAll('.btu-calc__unit-btn'); btns.forEach(function(b) { b.classList.toggle('active', b.getAttribute('data-unit') === unit); }); var indoorEl = $('indoorTemp'); var outdoorEl = $('outdoorTemp'); if (unit !== state.tempUnit) { if (unit === 'C') { if (indoorEl.value) indoorEl.value = Math.round(fToC(parseFloat(indoorEl.value))); if (outdoorEl.value) outdoorEl.value = Math.round(fToC(parseFloat(outdoorEl.value))); } else { if (indoorEl.value) indoorEl.value = Math.round(cToF(parseFloat(indoorEl.value))); if (outdoorEl.value) outdoorEl.value = Math.round(cToF(parseFloat(outdoorEl.value))); } } state.tempUnit = unit; calculate(); }; // —– Update outdoor temp when climate zone changes —– window.updateOutdoorTemp = function() { var climate = $('climate').value; var defaultF = CLIMATE_DEFAULTS_F[climate]; if (state.tempUnit === 'C') { $('outdoorTemp').value = Math.round(fToC(defaultF)); } else { $('outdoorTemp').value = defaultF; } }; // —– Model change handler —– window.onModelChange = function() { var sel = $('heaterModel'); var modelKey = sel.value; if (modelKey === 'custom') { show('customWattRow'); } else { hide('customWattRow'); } }; // —– Province change handler —– window.onProvinceChange = function() { var prov = $('province'); if (prov.value === 'custom_rate') { show('customRateField'); } else { hide('customRateField'); } }; // —– Get electricity rate —– function getRate() { var prov = $('province'); if (prov.value === 'custom_rate') { return parseFloat($('customRate').value) || 0.06; } return parseFloat(prov.value) || 0.06; } // —– Estimate daily BTC revenue for SHA-256 miner —– function estimateBtcPerDay(hashrateTHs) { // Revenue = (hashrate * 86400 * block_reward) / (difficulty * 2^32) var blockReward = 3.125; var hashrateHs = hashrateTHs * 1e12; var dailyBtc = (hashrateHs * 86400 * blockReward) / (state.networkDiff * Math.pow(2, 32)); // Subtract ~2% pool fee return dailyBtc * 0.98; } // —– Estimate Scrypt mining revenue (rough CAD/day) —– // Scrypt miners (L3+, L7) mine LTC/DOGE merged. Use rough estimate based on wattage efficiency. // At current conditions, Scrypt mining yields roughly $0.02-0.05/day per MH/s for L3+ class. // We use a conservative fixed ratio tied to wattage for Scrypt since exact LTC difficulty API adds complexity. function estimateScryptCadPerDay(watts) { // Very rough: ~$0.0015 CAD per watt per day for Scrypt miners at current conditions // This yields ~$1.20/day for an 800W L3+ and ~$1.95/day for a 1300W L7 return watts * 0.0015; } // —– Get selected miner data —– function getMinerData() { var sel = $('heaterModel'); var modelKey = sel.value; if (modelKey === 'custom') { var cw = parseFloat($('customWatts').value) || 0; var ch = parseFloat($('customHash').value) || 0; return { key: 'custom', name: 'Custom Miner', watts: cw, btu: cw * 3.412, hash: ch, hashUnit: 'TH/s', algo: 'SHA-256', noise: 0, price: 0, url: '/shop/' }; } var m = MODELS[modelKey]; return { key: modelKey, name: m.name, watts: m.watts, btu: m.btu, hash: m.hash, hashUnit: m.hashUnit, algo: m.algo, noise: m.noise, price: m.price, url: m.url }; } // —– Build recommendation cards —– function buildRecommendations(btuNeeded) { var container = $('recCards'); container.innerHTML = ''; if (!btuNeeded || btuNeeded = 90) { badgeClass = ‘best’; badgeText = ‘Best Match’; } else if (cov >= 70) { badgeClass = ‘good’; badgeText = ‘Good Option’; } else { badgeClass = ‘supplemental’; badgeText = ‘Consider’; } var cardClass = ‘btu-calc__rec-card’ + (idx === 0 ? ‘ best-match’ : ”); var html = ‘
‘; html += ‘‘ + badgeText + ‘‘; html += ‘‘; html += ‘
‘; html += ‘Power‘ + formatNum(m.watts) + ‘W‘; html += ‘BTU/hr‘ + formatNum(m.btu) + ‘‘; html += ‘Hashrate‘ + m.hash + ‘ ‘ + m.hashUnit + ‘‘; html += ‘Noise~’ + m.noise + ‘ dB‘; html += ‘Price$’ + formatNum(m.price) + ‘ CAD‘; html += ‘
‘; var covColor = cov >= 90 ? ‘var(–green)’ : (cov >= 60 ? ‘var(–accent)’ : ‘var(–yellow)’); html += ‘
‘; html += ‘Covers ‘ + Math.round(cov) + ‘% of your heating need’; if (cov > 120) html += ‘ (excess heat)’; html += ‘
‘; html += ‘
‘; container.innerHTML += html; }); // Always add Bitaxe as supplemental note var bx = MODELS.bitaxe; var bxCov = (bx.btu / btuNeeded) * 100; container.innerHTML += ‘
‘ + ‘Supplemental‘ + ‘‘ + ‘
‘ + ‘Power~25W‘ + ‘BTU/hr~85‘ + ‘Coverage‘ + bxCov.toFixed(1) + ‘%‘ + ‘
‘ + ‘
Solo mining lottery ticket — not a primary heater. Pair with a Space Heater Edition for the best of both worlds.
‘ + ‘
‘; } // —– Main calculation —– window.calculate = function() { // — Read inputs — var length = val(‘roomLength’); var width = val(‘roomWidth’); var height = val(‘roomHeight’); var insulation = $(‘insulation’).value; var indoorTemp = val(‘indoorTemp’); var outdoorTemp = val(‘outdoorTemp’); var numUnits = Math.max(1, Math.round(val(‘numUnits’))); var hoursPerDay = Math.max(1, Math.min(24, Math.round(val(‘hoursPerDay’)))); var rate = getRate(); // Update rate display setText(‘rateVal’, ‘$’ + rate.toFixed(4) + ‘/kWh’); // — Convert dimensions to feet — var lengthFt = state.dimUnit === ‘m’ ? mToFt(length) : length; var widthFt = state.dimUnit === ‘m’ ? mToFt(width) : width; var heightFt = state.dimUnit === ‘m’ ? mToFt(height) : height; // — Convert temps to F — var indoorF = state.tempUnit === ‘C’ ? cToF(indoorTemp) : indoorTemp; var outdoorF = state.tempUnit === ‘C’ ? cToF(outdoorTemp) : outdoorTemp; // — Calculate room — var sqft = lengthFt * widthFt; var volume = sqft * heightFt; var tempDelta = indoorF – outdoorF; // BTU/hr calculation: // Base formula: BTU = sqft * tempDelta * insulation_factor * height_factor // Height factor adjusts for ceilings above 8ft var heightFactor = heightFt > 8 ? (heightFt / 8) : 1; var insFactor = INSULATION[insulation].factor; var btuNeeded = sqft * tempDelta * insFactor * heightFactor; // Ensure non-negative if (btuNeeded 0 && width > 0 && height > 0; if (hasRoom) { show(‘results1’); setText(‘btuNeeded’, formatNum(Math.round(btuNeeded))); setText(‘wattsNeeded’, formatNum(Math.round(wattsNeeded)) + ‘W’); var volUnit = state.dimUnit === ‘m’ ? ‘ mu00B3’ : ‘ ftu00B3’; var areaUnit = state.dimUnit === ‘m’ ? ‘ mu00B2’ : ‘ sq ft’; var displayArea = state.dimUnit === ‘m’ ? (length * width) : sqft; var displayVol = state.dimUnit === ‘m’ ? (length * width * height) : volume; setText(‘roomVolume’, formatNum(Math.round(displayVol)) + volUnit); setText(‘roomAreaNote’, formatNum(Math.round(displayArea)) + areaUnit + ‘ floor area’); buildRecommendations(btuNeeded); } else { hide(‘results1’); } // — Miner data — var miner = getMinerData(); var totalWatts = miner.watts * numUnits; var totalBtu = totalWatts * 3.412; var totalHash = miner.hash * numUnits; var hasMiner = totalWatts > 0; if (hasMiner) { show(‘results2’); setText(‘totalBtu’, formatNum(Math.round(totalBtu)) + ‘ BTU/hr’); setText(‘totalWatts’, formatNum(Math.round(totalWatts)) + ‘W’); var hashDisplay = totalHash; var hashUnitDisplay = miner.hashUnit; // Convert if large if (miner.hashUnit === ‘TH/s’ && totalHash >= 1000) { hashDisplay = totalHash / 1000; hashUnitDisplay = ‘PH/s’; } if (typeof hashDisplay === ‘number’ && hashDisplay % 1 !== 0) { setText(‘totalHash’, hashDisplay.toFixed(1) + ‘ ‘ + hashUnitDisplay); } else { setText(‘totalHash’, formatNum(hashDisplay) + ‘ ‘ + hashUnitDisplay); } setText(‘hashAlgo’, miner.algo); } else { hide(‘results2’); } // — Coverage — if (hasRoom && hasMiner && btuNeeded > 0) { show(‘coverageSection’); var coverage = (totalBtu / btuNeeded) * 100; var covDisplay = Math.round(coverage); var barWidth = Math.min(coverage, 130); var covPctEl = $(‘coveragePct’); covPctEl.textContent = covDisplay + ‘%’; var bar = $(‘coverageBar’); bar.style.width = Math.min(barWidth, 100) + ‘%’; var msgEl = $(‘coverageMsg’); if (coverage >= 110) { bar.style.background = ‘linear-gradient(90deg, var(–accent), #ff9a44)’; covPctEl.style.color = ‘var(–accent)’; msgEl.className = ‘btu-calc__coverage-msg status-over’; msgEl.innerHTML = ‘ This setup exceeds your heating needs by ‘ + (covDisplay – 100) + ‘%. You may want to lower the wattage via firmware, reduce the number of units, or vent excess heat. Optimized firmware (BraiinsOS+) lets you dial in the exact wattage you need.‘; } else if (coverage >= 90) { bar.style.background = ‘linear-gradient(90deg, var(–green), #34d399)’; covPctEl.style.color = ‘var(–green)’; msgEl.className = ‘btu-calc__coverage-msg status-good’; msgEl.innerHTML = ‘ Excellent coverage. This setup will comfortably heat your room while mining Bitcoin. A near-perfect match for your space.‘; } else if (coverage >= 60) { bar.style.background = ‘linear-gradient(90deg, var(–yellow), var(–accent))’; covPctEl.style.color = ‘var(–yellow)’; msgEl.className = ‘btu-calc__coverage-msg status-warn’; msgEl.innerHTML = ‘ Partial coverage. This miner will noticeably warm your room but may not fully replace your existing heater in extreme cold. Consider adding a second unit or choosing a higher-wattage model.‘; } else { bar.style.background = ‘linear-gradient(90deg, var(–red), #f87171)’; covPctEl.style.color = ‘var(–red)’; msgEl.className = ‘btu-calc__coverage-msg status-low’; msgEl.innerHTML = ‘ This model covers only ‘ + covDisplay + ‘% of your room’s heating needs. You will need supplemental heating, multiple units, or a higher-wattage model like the S19 Space Heater Edition (11,089 BTU/hr).‘; } } else { hide(‘coverageSection’); } // — Cost Comparison — if (hasMiner) { show(‘costResults’); // Monthly electricity cost var kWhPerDay = (totalWatts / 1000) * hoursPerDay; var monthlyKWh = kWhPerDay * 30.44; var monthlyElecCost = monthlyKWh * rate; // Mining revenue var dailyBtcCad = 0; if (miner.algo === ‘SHA-256’) { var hashTHs = 0; if (miner.hashUnit === ‘TH/s’) hashTHs = totalHash; else if (miner.hashUnit === ‘GH/s’) hashTHs = totalHash / 1000; else if (miner.hashUnit === ‘MH/s’) hashTHs = totalHash / 1e6; var dailyBtc = estimateBtcPerDay(hashTHs); dailyBtcCad = dailyBtc * state.btcPrice; var dailySats = Math.round(dailyBtc * 1e8); var monthlyBtc = dailyBtc * 30.44; setText(‘btcMined’, (monthlyBtc * 1e8).toFixed(0).replace(/B(?=(d{3})+(?!d))/g, ‘,’) + ‘ sats’); setText(‘btcMinedSats’, formatNum(dailySats) + ‘ sats/day’); } else { // Scrypt dailyBtcCad = estimateScryptCadPerDay(totalWatts); var monthlyScrCad = dailyBtcCad * 30.44; setText(‘btcMined’, formatCurrency(monthlyScrCad)); setText(‘btcMinedSats’, formatCurrency(dailyBtcCad) + ‘/day (LTC+DOGE)’); } // Adjust revenue for hours (if not 24h, scale down) var revenueScale = hoursPerDay / 24; dailyBtcCad = dailyBtcCad * revenueScale; var monthlyRevenue = dailyBtcCad * 30.44; // Recalculate sats display with hours scaling if (miner.algo === ‘SHA-256’) { var hashTHs2 = 0; if (miner.hashUnit === ‘TH/s’) hashTHs2 = totalHash; else if (miner.hashUnit === ‘GH/s’) hashTHs2 = totalHash / 1000; var dailyBtcAdj = estimateBtcPerDay(hashTHs2) * revenueScale; var monthlyBtcAdj = dailyBtcAdj * 30.44; var dailySatsAdj = Math.round(dailyBtcAdj * 1e8); setText(‘btcMined’, formatNum(Math.round(monthlyBtcAdj * 1e8)) + ‘ sats’); setText(‘btcMinedSats’, formatNum(dailySatsAdj) + ‘ sats/day’); monthlyRevenue = monthlyBtcAdj * state.btcPrice; } else { var dailyScryptAdj = estimateScryptCadPerDay(totalWatts) * revenueScale; monthlyRevenue = dailyScryptAdj * 30.44; setText(‘btcMined’, formatCurrency(monthlyRevenue)); setText(‘btcMinedSats’, formatCurrency(dailyScryptAdj) + ‘/day (LTC+DOGE est.)’); } var effectiveMonthlyCost = monthlyElecCost – monthlyRevenue; var annualSavingsVal = monthlyRevenue * 12; // Update cost cards setText(‘elecCost’, formatCurrency(monthlyElecCost)); setText(‘miningRevenue’, ‘+’ + formatCurrency(monthlyRevenue)); $(‘effectiveCost’).textContent = formatCurrency(effectiveMonthlyCost); $(‘effectiveCost’).style.color = effectiveMonthlyCost < monthlyElecCost ? 'var(–green)' : 'var(–text-primary)'; // Comparison cards setText('compTradBtu', formatNum(Math.round(totalBtu)) + ' BTU/hr'); setText('compTradWatts', formatNum(Math.round(totalWatts)) + 'W'); setText('compTradCost', formatCurrency(monthlyElecCost)); setText('compTradNet', formatCurrency(monthlyElecCost)); var modelLabel = miner.key !== 'custom' ? miner.name : 'Custom Miner'; setText('compMinerTitle', modelLabel); setText('compMinerBtu', formatNum(Math.round(totalBtu)) + ' BTU/hr'); setText('compMinerWatts', formatNum(Math.round(totalWatts)) + 'W'); setText('compMinerCost', formatCurrency(monthlyElecCost)); setText('compMinerBtc', '+' + formatCurrency(monthlyRevenue)); setText('compMinerNet', formatCurrency(effectiveMonthlyCost)); // Annual savings setText('annualSavings', formatCurrency(annualSavingsVal)); var note = 'Same heat output. Same electricity consumption. But your heater is also a Bitcoin miner stacking sats. '; if (miner.algo === 'SHA-256') { note += 'Estimates based on current BTC price (' + formatCurrency(state.btcPrice) + ' CAD) and network difficulty. '; } else { note += 'Scrypt mining revenue is an approximate estimate based on current market conditions. '; } note += 'Actual results will vary with market conditions, difficulty adjustments, and uptime.'; if (!state.btcPriceLoaded) { note += ' (Using fallback BTC price — live price could not be fetched.)'; } setText('savingsNote', note); } else { hide('costResults'); } }; // —– Initialize —– function init() { fetchBtcData(); updateOutdoorTemp(); // Set initial temp unit display (default is F) state.tempUnit = 'F'; var tempBtns = $('tempUnitToggle').querySelectorAll('.btu-calc__unit-btn'); tempBtns.forEach(function(b) { b.classList.toggle('active', b.getAttribute('data-unit') === 'F'); }); // Set initial dim unit (default ft) state.dimUnit = 'ft'; // Run initial calc (will show nothing until inputs are filled) calculate(); } // Run on DOM ready if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init); } else { init(); } })();

Is a Bitcoin miner really as warm as a regular space heater?

Yes. This is physics, not marketing. A 1,400-watt device produces 1,400 watts of heat regardless of whether it is a ceramic heating element or a Bitcoin ASIC chip. The first law of thermodynamics guarantees that all electrical energy consumed by any device ultimately converts to thermal energy. A Bitcoin miner at 1,400W produces exactly 4,777 BTU/hr of heat — identical to a 1,400W electric space heater. The only difference is that the miner is also performing useful computational work…

How loud are D-Central’s Space Heater Editions?

Standard ASIC miners use industrial fans that can reach 75–85 dB (louder than a vacuum cleaner). D-Central replaces these with premium silent fans — Noctua NF-A14 or Arctic P14 Max — bringing noise levels down to 35–45 dB depending on the model. For reference, a typical refrigerator runs at about 40 dB, and a quiet conversation is about 50 dB. Our Slim Edition and StealthMiner models are the quietest at approximately 35 dB. With optimized firmware, you can further…

How much Bitcoin will I actually earn?

Mining revenue depends on several variables: your miner’s hashrate, current network difficulty, Bitcoin price, and your mining pool’s fee structure. The estimates in this calculator use current network conditions and should be treated as approximations. At today’s difficulty, an S9 at 13 TH/s will earn a modest amount of sats daily — think of it as a discount on your heating bill rather than a profit center. The S19 at 56 TH/s earns proportionally more. The key insight is that you are…

Can I run a Space Heater on a standard 120V/15A household outlet?

Most of our models run on standard North American 120V outlets. The S9 (1,400W), S17 (1,000W), Slim Edition (900W), Loki Edition (1,150W), L3+ (800W), and BitChimney (800W) all draw under 1,500W and work on a standard 15A circuit. The S19 Space Heater Edition at 3,250W requires a 240V/20A outlet (like a dryer or oven outlet) — similar to what a large window AC unit or baseboard heater uses. We include the appropriate power supply and cable with every order. If you are unsure about your…

What happens in summer when I do not need heat?

You have several options. Many customers vent the hot air outside using a window adapter or dryer vent duct — similar to a portable AC unit’s exhaust. Some move the miner to a garage or basement. Others simply turn it off for the summer months and run it only during the heating season (October through April in most of Canada). With optimized firmware, you can also reduce wattage significantly, lowering both heat output and power consumption while still earning some Bitcoin. D-Central…

Is this worth it compared to a heat pump or natural gas furnace?

A Bitcoin space heater is an electric resistance heater — the same category as baseboard heaters, ceramic heaters, and oil-filled radiators. It produces 1 watt of heat per 1 watt of electricity (COP of 1.0). Heat pumps achieve COP ratings of 2.0–4.0, meaning they move 2–4 watts of heat per watt of electricity. So a heat pump is more energy-efficient for primary whole-home heating. A Bitcoin space heater is best used as supplemental or zone heating — warming the room…