STUV AMERICA Six 66-50
STUV AMERICA Six 66-50 is a non-catalytic wood stove from STUV AMERICA certified at 1.9 g/hr particulate emissions with 68% HHV efficiency and a 14,802–17,121 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | Six 66-50 |
| Emission rate | 1.9 g/hr |
|---|---|
| Carbon monoxide | 1.35 g/min |
| Efficiency (HHV) | 68 % |
|---|
| Heat output (low) | 14802 BTU/h |
|---|---|
| Heat output (high) | 17121 BTU/h |
| Firebox volume | 1.08 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 284-20 |
What space does the STUV AMERICA Six 66-50 suit?
- Its 17,121 BTU/h peak output covers roughly 500–700 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 1.08 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
- STUV AMERICA 30 Compact (1.8 g/hr)
- Pacific Energy Fireplace Products Limited True North TN10 (1.4 g/hr)
- Hearth and Home Technologies Vermont Castings Intrepid FlexBurn 2115-CAT (0.3 g/hr)
- Hearth and Home Technologies Quadra-Fire Pioneer III-ARC & Quadra-Fire – Pioneer III -REC Wood Heater Model Line (1.3 g/hr)
- Hearth and Home Technologies Vermont Castings Intrepid FlexBurn 2115 (0.6 g/hr)
- Foyers Supreme Astra 18 (2 g/hr)
Frequently asked questions
Is the STUV AMERICA Six 66-50 EPA certified?
Yes, the STUV AMERICA Six 66-50 is on the EPA's current list of certified wood heaters (certification number 284-20) and meets the 2020 NSPS Step 2 emission limits.
What is the STUV AMERICA Six 66-50's emission rate?
The STUV AMERICA Six 66-50 is certified at 1.9 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 STUV AMERICA Six 66-50 heat?
Roughly 500–700 sq ft, estimated from its 17,121 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 STUV AMERICA Six 66-50 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 STUV AMERICA Six 66-50's certified efficiency is 68% HHV, which did not meet 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)