140 mm Intake Filter Ring

Description

140 mm intake filter ring for Whatsminer and big-fan builds

This 140 mm intake filter ring is the large-fan dust filter that is oddly hard to buy: a frame that holds filter media across a 140 mm intake fan on Whatsminer M-series hardware, 140 mm Antminer faces and any workshop build running the bigger fan. The 120 mm world is well served by the PC-cooling market. The 140 mm world mostly is not, which is why this part exists.

Big fans are the ones that need it most. A machine pulling air through a 140 mm intake is drawing a serious volume of room air through itself every hour, and whatever is suspended in that air — sawdust, drywall grit, dryer lint, barn dust, cat hair — ends up packed between hashboard fins where nothing but a teardown will get it out again.

Put a filter in front and the dirt is on the outside of the case, on a frame you can lift, shake and refit while the machine keeps hashing.

What it fits

Any standard 140 mm fan face, mounted on the intake side. That covers the Whatsminer M-series that made 140 mm the industrial norm — M30S+, M50, M50S+ and M60 — along with the 140 mm fan faces on the Antminer S21 Pro and XP family and any custom enclosure built around a 140 mm fan.

The frame is 160 × 160 × 23.6 mm and takes flat media cut from sheet stock. There is no cartridge to buy and no consumable that only we sell.

If the fan you are filtering is 120 mm, the 120 mm Intake Filter Ring is the right size. If it is a twin 120 mm intake panel on an Antminer S19 or standard S21, use the Antminer S19 / S21 Dual 120 mm Intake Filter Ring, which spans both fans on one frame.

How it is used

1. Cut a pad of filter media to the ring aperture — scissors and a straight edge are enough.
2. Seat the pad in the frame and mount the frame to the intake fan face.
3. Leave the exhaust end alone; that is where the shroud and duct go.
4. Check the pad weekly at first. A 140 mm machine in a shop will surprise you with what it collects.
5. Wash or swap the pad on whatever interval your room turns out to need — monthly is a common rhythm for a garage or workshop.

Why this is the highest-value cheap part in the catalogue

Everything else in this line moves air or moves heat. This one protects the asset. A hashboard whose fins are packed with dust is running its chips warmer at the same fan speed, and warm chips age faster and hash less consistently — a slow, invisible tax on a machine you paid four figures for, prevented by a frame that costs about as much as a takeaway lunch.

The frame holds the media flat and full-width across the aperture so air goes through the pad rather than around it, and the media pulls out without unbolting the frame, which is the difference between a maintenance habit you keep and one you abandon in March. One continuous PETG body with the stiffness to keep a full-width pad flat under suction, and nothing to delaminate on a warm front panel.

• Covers the 140 mm size that is genuinely hard to buy a filter frame for
• Takes any flat media cut from sheet stock — no proprietary cartridge, ever
• Keeps dust out of hashboard fins, where removing it means a teardown
• Media pulls out for washing without unbolting the frame from the machine
• Suits the Whatsminer M-series intake face and other 140 mm fan positions
• Single continuous PETG body — no assembly, no fasteners, no glued joints

Specifications

Open source — print it yourself, or buy it finished

Nobody should have to pay a licence to keep dust out of their own hardware. D-Central Technologies drew this frame around the 140 mm fan face, measured it, and open-sourced it under CC BY-SA 4.0 through the 3D models download center — our design, start to finish. Its card is at the 140 mm intake filter ring entry, free for anyone to print, adapt to a fan face outside this list, or produce and sell commercially.

Pull it straight down: the 140 mm filter ring bundle contains the STL, the CC BY-SA 4.0 licence and the installation and safety guide.

This page sells the finished article for people who would rather bolt one on tonight: made to order in PETG, in black or orange, shipped from Montreal, Quebec. The STL costs nothing and always will; what a purchase, or a direct contribution through D-Central’s fund page, buys is the drafting time behind the next part in the series.

Works with

• 120 mm Intake Filter Ring
• Whatsminer 140 mm Fan to 6″ Duct Shroud
• Whatsminer 140 mm Fan to 8″ Duct Shroud
• 140 mm to 120 mm Fan Adapter
• Antminer S21 Pro Dual 140 mm to 8″ Duct Shroud

Clean air in, ducted heat out — the whole run is mapped in the D-Central shroud and ducting system.

Frequently asked questions