Space Heater Mining (2025): Heat Your Room While You Mine

September 21, 2025
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Turn miner watts into comfortable heat. This guide compares Heatbit (Trio/Mini/Maxi), Canaan Avalon Nano 3S, and FutureBit Apollo II as apartment-friendly “heater miners,” explains how much warmth to expect, and shows quiet placement, airflow, and safety tips.

Every watt a miner draws becomes room heat. If you choose devices designed for living spaces and route air smoothly, you can warm a room while mining in the background. Below you’ll find head-to-head picks (Heatbit vs Avalon Nano 3S vs FutureBit Apollo II), heat output in BTU/h, quiet setup recipes, and safety/network checklists. For hands-on placement and noise control, see Quiet Apartment Mining and for wiring limits read Power & Safety (120V/240V).

Key Take Aways

- Heater first, miner second: Purpose-built devices like Heatbit Trio and FutureBit Apollo II are engineered for living rooms: low noise, steady warm airflow, and simple controls. (heatbit.com, FutureBit)
- Easy heat math: 1 W ≈ 3.412 BTU/h. So 400 W ≈ 1,365 BTU/h; 1,200 W ≈ 4,095 BTU/h. Use this to match a device to your room size. (The Department of Energy’s Energy.gov)
- Canaan Avalon Nano 3S is a compact “mini-heater miner” (6 TH/s, 140 W, 33–40 dB) that fits desks and home offices. (Avalon Miner – Canaan Official Shop)
- Quiet comes from airflow: short ducts, gentle bends, and (if needed) a slow inline fan pulling air so the miner’s own fans spin slower—see Quiet Apartment Mining.
- Safety first: miners are continuous loads; stay under circuit limits and use quality cords—see Power & Safety (120V/240V).

The “heater miner” short-list (what to buy and why)

1) Heatbit (Trio, Mini, Maxi)

Heatbit is a home heater that mines—polished enclosure, thermostatic modes, low noise, and plug-and-play setup. Trio advertises ~8.5–10 TH/s at ~400 W with ~40 dB operation, plus an optional heating boost mode for colder days. Maxi adds higher performance modes (up to 39 TH/s and ~1,200 W heat in “Beast”). These are built to sit in living spaces and push warm air smoothly. (heatbit.com)

Why it stands out: one appliance for heat + mining, low setup friction, quiet tone.
Mind the details: Trio’s default mining power is ~400 W (≈ 1,365 BTU/h of heat). Boost modes raise heat significantly; plan your circuit and airflow accordingly. (The Department of Energy’s Energy.gov)

2) FutureBit Apollo II

Apollo II aims squarely at home users: ~6–10 TH/s with ~175–375 W power range and under 40 dBA in ECO mode; a compact “appliance” form factor fits shelves and desks. (FutureBit)

Why it stands out: flexible power modes (≈ 596–1,279 BTU/h), approachable UI, quiet profiles suitable for bedrooms/offices.
Mind the details: in TURBO (~375 W), plan for a small room or hallway and give the intake clear air. (The Department of Energy’s Energy.gov)

3) Canaan Avalon Nano 3S

The Avalon Nano 3S delivers 6 TH/s at up to 140 W, with 33–40 dB noise in a tiny body—marketed as a portable small heater that can sit on a desk. It’s an easy way to “take the edge off” a room while mining. (Avalon Miner – Canaan Official Shop, Newegg.com)

Why it stands out: very compact, gentle heat (≈ 477 BTU/h), simple to place and power.
Mind the details: lower power means softer heat; pair with a short duct or doorway placement to spread warmth quietly. (The Department of Energy’s Energy.gov)

Comparison: heater-style miners for apartments (2025)

Model	Algorithm	Vendor hashrate	Mining power	Noise (vendor)	Approx. heat (BTU/h)	Notes / Best use
Heatbit Maxi	SHA-256	39 TH/s (heatbit.com)	1,200 W (heatbit.com)	—	4,094	Heater-miner appliance for living rooms; HEPA purification; plan circuit headroom. (heatbit.com)
Heatbit Trio	SHA-256	Up to 13 TH/s (heatbit.com)	~400 W (plus optional extra heat +1000–1400 W for cold days) (heatbit.com)	~45 dB (heatbit.com)	1,365 (mining); 3,412–4,777 (with extra heat)	Purpose-built heater-miner; quiet, plug-and-play. (heatbit.com)
Canaan Avalon Nano 3S	SHA-256	6 TH/s (Avalon Miner – Canaan Official Shop)	140 W (Avalon Miner – Canaan Official Shop)	33–40 dB (Avalon Miner – Canaan Official Shop)	478	Compact “mini-heater miner” for desks/offices. (Avalon Miner – Canaan Official Shop)
FutureBit Apollo II	SHA-256	6–10 TH/s (FutureBit LLC, FutureBit)	~175–375 W (FutureBit)	<40 dBA (ECO) (FutureBit)	596–1,279	Appliance-style home miner; flexible power modes. (FutureBit)
Braiins Mini Miner BMM101	SHA-256	1.0 TH/s (braiins.com)	40 W (80 W max OC) (braiins.com)	~40 dB (braiins.com)	136	Ultra-quiet desk warmth; learning/lottery device. (braiins.com)
NerdQaxe++ (Rev6)	SHA-256	Up to ~6–6.5 TH/s (Solo Satoshi)	~100–102 W (Solo Satoshi)	—	341–348	Open-source multi-chip board; very quiet heat trickle. (Solo Satoshi)
Bitaxe Gamma 601	SHA-256	~1.2 TH/s (Kryptex Pools)	~20 W (Kryptex Pools)	—	68	Whisper-quiet background warmth; tinkering/education. (Kryptex Pools)
Goldshell Mini-DOGE II	Scrypt	335–420 MH/s (Goldshell Official)	260–400 W (Goldshell Official)	≤35 dB (Goldshell Official)	887–1,365	Shelf-friendly Scrypt miner; gentle room heat. (Goldshell Official)

BTU/h values are calculated via 1 W ≈ 3.412 BTU/h to help you right-size heat to a room. (The Department of Energy’s Energy.gov)

Other home-scale options

Braiins Mini Miner BMM101 — ~1 TH/s at ~40 W, ~40 dB; a quiet “warm desk gadget” and great learning device (≈ 136 BTU/h). (braiins.com)
NerdQaxe rev6/++ — open-source multi-chip board; retailers claim ~6 TH/s near ~100 W (numbers vary by batch/settings; treat as indicative). Good heat-per-watt if configured well. (Solo Satoshi)
Goldshell Mini-DOGE II — Scrypt miner often used on shelves; listed at ~400 W and ~35 dB by some vendors (≈ 1,365 BTU/h). (Crypto Miner Bros)

How much heat do you actually need?

Use the simple rule: watts × 3.412 = BTU/h.

~400 W device → ~1,365 BTU/h (noticeable in small rooms).
~600 W → ~2,047 BTU/h (helps a small living room).
~1,200 W → ~4,095 BTU/h (substantial warmth; plan airflow). (The Department of Energy’s Energy.gov)

If you already run an electric heater, a heater-miner of similar watts gives similar heat, but may offset a slice of your bill with mining yield.

Quiet placement & airflow (quick wins)

Give clear intake (30–50 cm) and keep exhaust paths short with gentle bends.
A small inline duct fan that pulls from the miner lets onboard fans run slower (quieter). See Quiet Apartment Mining for two copy-ready builds.
Rubber feet/dense base kill vibration; a doorway or hallway spreads warmth without blasting one spot.

Safety & power planning (treat it like a heater)

Miners are continuous loads (run for 3+ hours at a time), so follow the 80% circuit rule, keep cords short and properly gauged, and avoid daisy-chained strips. Start with Power & Safety (120V/240V) for breaker limits, plug types, and cord guidance.

Network stability (fewer stales = more effective heat-per-coin)

Prefer Ethernet; if wireless, use strong 5/6 GHz with a nearby access point and clean channels.
Compare pool regions and watch stale % with the Pool Latency & Fee Sheet and tips in Wi-Fi vs Ethernet.

Simple build recipes

A) Living-room “heater-miner”

Heatbit Trio (or Apollo II) placed near a doorway.
Ethernet back to router (or strong 5/6 GHz).
Start in quiet/eco mode; bump power until the room feels right.
Optional: a short, discrete duct section to guide warm air along a wall.

B) Office “mini-heater miner”

Avalon Nano 3S on rubber pads at desk height.
Ethernet to router/switch.
Keep intake unobstructed; crack a door for even heat.
Clean intake grills every few weeks to keep fans slow and quiet.

FAQ's

Will a heater-miner replace my room heater?

It depends on watts. A 400 W unit adds a steady stream of warm air suited to small rooms; higher-power modes can handle larger spaces.

Is the heat “free”?

Electric watts become heat either way. The difference is the miner may offset some cost with earnings. Compare with your electricity rate.

Are these actually quiet?

They’re engineered for home use. Tone and placement matter—smooth airflow and a short exhaust path sound much calmer than cramped, high-RPM fan noise.

Can I sleep in the same room?

Start with low power/quiet mode and check fan tone. Place on rubber feet and keep intake/exhaust clear.

Can I run SOLO while heating?

Yes, but expect long dry spells—SOLO pays only if you find a block. Check your odds first.