US Stove TH-100
#4 in Wood stovesFull review
A tiny, efficient wood stove for a cabin, tiny house or single room. Have it installed to the manual and local code, and plan on cutting short logs.
Amazon $678.99$678.99
The US Stove TH-100 is the better stove overall, rated 3.5 to 3.3. The US Stove TH-100 leads on value. The Hearthstone Green Mountain 40 wins on efficiency, emissions and convenience. The US Stove TH-100 costs $2,670.01 less ($678.99 vs $3,349).
Hearthstone Green Mountain 40
#18 in Wood stovesFull review
For a small to mid size home that wants long, clean catalytic burns and soapstone’s gentle heat in a compact stove.
Leisure Time $3,349 Lehman's $3,499$3,349
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the US Stove TH-100 for value ($26.09 per 1,000 BTU of EPA tested output ($678.99, 26,028 BTU) vs $139.54 per 1,000 BTU of EPA tested output ($3,349, 24,000 BTU)).
- Choose the Hearthstone Green Mountain 40 for efficiency (79% EPA tested efficiency (HHV) vs 75% EPA tested efficiency (HHV)), emissions (1.1 g/h of smoke particles (EPA) vs 1.7 g/h of smoke particles (EPA)) and convenience (takes 16 in logs, blower optional vs takes 11 in logs, blower optional).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every wood stoves stove; a clear win is highlighted. How we rank explains each one.
| Factor weight | US Stove TH-100 | Hearthstone Green Mountain 40 |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Efficiency 30% | 75 75% EPA tested efficiency (HHV) | 95 79% EPA tested efficiency (HHV) |
| Value 30% | 60 $26.09 per 1,000 BTU of EPA tested output ($678.99, 26,028 BTU) | 0 $139.54 per 1,000 BTU of EPA tested output ($3,349, 24,000 BTU) |
| Emissions 15% | 32 1.7 g/h of smoke particles (EPA) | 58 1.1 g/h of smoke particles (EPA) |
| Warranty 10% | 100 limited lifetime warranty | 100 limited lifetime warranty |
| Convenience 15% | 20 takes 11 in logs, blower optional | 35 takes 16 in logs, blower optional |
Specifications
| US Stove TH-100 | Hearthstone Green Mountain 40 | |
|---|---|---|
| EPA certification | ||
| EPA certified | Yes (2020 standard) | Yes (2020 standard) |
| Efficiency (HHV) | 75% | 79% |
| Emissions | 1.7 g/h | 1.1 g/h |
| Tested heat output | 10,652 to 26,028 BTU | 14,000 to 24,000 BTU |
| Heating | ||
| Fuel | Cord wood | Cord wood |
| Type | Freestanding | Freestanding |
| Advertised output | 26,000 BTU | 40,000 BTU |
| Heats up to | 750 sq ft | 1,400 sq ft |
| Catalytic | No | Yes |
| Blower | Optional | Optional |
| Thermostat | No | No |
| App control | No | No |
| Fuel | ||
| Firebox | - | 1.3 cu ft |
| Longest log | 11 in | 16 in |
| Power needed | None | None |
| Installation | ||
| Flue size | 6 in | 6 in |
| Mobile home approved | Yes | Yes |
| Safety listing | UL | PFS |
| Dimensions | 16.4 x 13 x 26.75 in (W x D x H) | 23.25 x 19.375 x 30.375 in (W x D x H) |
| Weight | 148 lb | 350 lb |
| Warranty | Limited lifetime | Limited lifetime |
| Released | 2023-10-24 | - |