United States Stove Company TH-100
United States Stove Company TH-100 is a non-catalytic wood stove from United States Stove Company certified at 1.7 g/hr particulate emissions with 75% HHV efficiency and a 10,652–26,028 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | TH-100, US500E, AW520E, VG520, SW500, CH500, KW500, CGWS750 |
| Emission rate | 1.7 g/hr |
|---|---|
| Carbon monoxide | 0.78 g/min |
| Efficiency (HHV) | 75 % |
|---|
| Heat output (low) | 10652 BTU/h |
|---|---|
| Heat output (high) | 26028 BTU/h |
| Firebox volume | 0.59 cu ft |
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 322-22 |
What space does the United States Stove Company TH-100 suit?
- Its 26,028 BTU/h peak output covers roughly 750–1,050 sq ft at the 25–35 BTU/h-per-square-foot rule of thumb — see the sizing calculator to adjust for your insulation and climate.
- The 0.59 cu ft firebox puts it in the small/cabin class.
- Rough fuel use: about 1.3 cords per season at the midpoint of its output range (8 burn-hours/day, 150-day season, 22 MMBtu/cord — see methodology).
- Certified burning Crib Wood .
Similar wood stoves
- Hase Kaminofenbau (Hearthstone Quality Home Products Inc.) Bari (0.94 g/hr)
- Hearthstone Quality Home Heating Products Bari 8171 (0.94 g/hr)
- Foyers Supreme Ambiance Elegance 36 24SF (1.8 g/hr)
- Blaze King Industries Ashford AF25 (0.9 g/hr)
- Foyers Supreme Astra 38 (1.8 g/hr)
- Stove Builder International 1.4 Series (Osburn 950 (1.8 g/hr)
Frequently asked questions
Is the United States Stove Company TH-100 EPA certified?
Yes, the United States Stove Company TH-100 is on the EPA's current list of certified wood heaters (certification number 322-22) and meets the 2020 NSPS Step 2 emission limits.
What is the United States Stove Company TH-100's emission rate?
The United States Stove Company TH-100 is certified at 1.7 grams of particulates per hour (tested with crib wood). Real-world emissions depend heavily on fuel moisture and operation — the lab figure assumes seasoned fuel and correct air settings.
How many square feet can the United States Stove Company TH-100 heat?
Roughly 750–1,050 sq ft, estimated from its 26,028 BTU/h peak output at 25–35 BTU/h per square foot. Insulation, climate, ceiling height, and floor plan move this figure substantially in both directions.
Does the United States Stove Company TH-100 qualify for a federal tax credit?
No — the federal 25C credit for biomass stoves was terminated for property placed in service after December 31, 2025. The United States Stove Company TH-100's certified efficiency is 75% HHV, which met the credit's ≥75% HHV threshold while it existed. State and local incentive programs may still apply — check your state energy office and air district.
Sources
- cfpub.epa.gov (retrieved 2026-07-23)