STUV AMERICA STUV 1668IN
STUV AMERICA STUV 1668IN is a non-catalytic wood stove from STUV AMERICA certified at 1.7 g/hr particulate emissions with 66% HHV efficiency and a 22,179–23,727 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | STUV 1668IN, STUV 1668 CUBE, STUV 1668H, STUV 1668-Z |
| Emission rate | 1.7 g/hr |
|---|---|
| Carbon monoxide | 1.7 g/min |
| Efficiency (HHV) | 66 % |
|---|
| Heat output (low) | 22179 BTU/h |
|---|---|
| Heat output (high) | 23727 BTU/h |
| Firebox volume | 1.94 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 243-19 |
What space does the STUV AMERICA STUV 1668IN suit?
- Its 23,727 BTU/h peak output covers roughly 700–950 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 1.94 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 1.9 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
- Energy Distribution Invicta Group: Kazan (1.8 g/hr)
- Foyers Supreme Astra 24 24SFC (2) (1.9 g/hr)
- Morso Jernstoberi A/S 7110 C (1.5 g/hr)
- Jotul North America (Jotul U.S.A., Inc.) F602 V3 (1.4 g/hr)
- STUV AMERICA STÛV 6 IN 76x60 (1.9 g/hr)
- STUV AMERICA STUV SIX 76-60 (1.9 g/hr)
Frequently asked questions
Is the STUV AMERICA STUV 1668IN EPA certified?
Yes, the STUV AMERICA STUV 1668IN is on the EPA's current list of certified wood heaters (certification number 243-19) and meets the 2020 NSPS Step 2 emission limits.
What is the STUV AMERICA STUV 1668IN's emission rate?
The STUV AMERICA STUV 1668IN 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 STUV AMERICA STUV 1668IN heat?
Roughly 700–950 sq ft, estimated from its 23,727 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 STUV 1668IN 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 STUV 1668IN's certified efficiency is 66% 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)