ASIC Heat Reuse Decision Workbook
Commercial-interest and safety disclosure: D-Central sells mining equipment and related services. This educational workbook is not a product recommendation, financial advice, electrical advice, or an installation design. Confirm equipment requirements with the applicable manual and use qualified local professionals where required.
This workbook separates four things that are often merged: electricity consumed, heat that reaches a useful boundary, the cost of alternative delivered heat, and other operating or project costs. It does not estimate mining income, asset prices, network conditions, or investment outcomes.
Enter your own measured assumptions
Leave a field blank until you can support it with a bill, meter, operating record, or a documented alternative-heating estimate. Currency fields may use any one currency, provided every cost input uses the same currency.
Boundary and heat-use checks
- State where wall power is measured and whether any supporting equipment is included.
- State where heat is released and whether it arrives during a real heating demand.
- Compare against the actual alternative system’s delivered-heat cost; do not assume every alternative has the same efficiency.
- Record ventilation, cooling, noise, maintenance, controls, downtime, and any cost that remains even when heat is useful.
- Keep electrical, mechanical, fire, lease, insurance, and local-rule decisions outside this worksheet.
Dimensional equations
| Quantity | Equation | Unit discipline |
|---|---|---|
| Input electricity | E = (W / 1000) × h × d |
W becomes kW; multiply by hours/day and days to obtain kWh. |
| Useful heat assumption | Quseful = E × f |
f is the user-entered fraction from 0 to 1. |
| Avoided heating expense | A = Quseful × calt |
calt is cost per delivered kWh for the alternative system. |
| Period operating cost | C = (E × celec) + Cother − A |
All money terms must use one currency and one period. |
These equations do not create a mining-income estimate. They show how a claimed heat credit changes only the stated operating-cost boundary.
Evidence and next steps
Use a power meter, utility bill, operating log, and evidence for the alternative heating system. A network-hashrate value is an estimate based on a selected block window, not a direct measurement of a fixed mining fleet; it is intentionally outside this workbook.
- NIST SI units reference — dimensional checks for energy and power.
- Natural Resources Canada home energy efficiency resources — building and heating context.
- Bitcoin Core mining RPC source — estimate-window treatment of network hash rate.
For protocol roles, site commissioning, maintenance, and measurement boundaries, see the related educational guides: how Bitcoin mining works, commissioning feasibility, preventive maintenance, and hashrate measurement.
Frequently asked questions
Does a mining device turn its input electricity into heat?
Electrical input ultimately becomes heat within a sufficiently local energy boundary, but that does not establish that the heat reaches the room or system where it is needed.
What is the useful-heat fraction?
It is the share of the device output that actually displaces a heating demand you would otherwise meet during the selected period. It is a user judgement, not a device specification.
Does a heat credit make electricity free?
No. Electricity remains an expense. The worksheet separately estimates an avoided heating expense and does not treat that estimate as revenue or a certain saving.
Why is a heat pump comparison different?
A heat pump moves heat and its delivered-heat cost depends on its measured seasonal performance and conditions. Enter the alternative system cost per delivered kilowatt-hour rather than assuming a generic conversion.
Does this workbook estimate mining income or investment performance?
No. It intentionally excludes mining income, asset price, network conditions, pool terms, taxes, financing, and resale value. Those uncertainties require separate, dated evidence.
Can this workbook size a circuit, duct, or fire-safety system?
No. It is an accounting worksheet, not electrical, mechanical, fire, building, or installation advice. Use the applicable manual, local rules, and qualified professionals.