STUV AMERICA STUV 1668IN (2)
STUV AMERICA STUV 1668IN (2) is a non-catalytic wood stove from STUV AMERICA certified at 1.9 g/hr particulate emissions with 61% HHV efficiency and a 20,480–24,818 BTU/h output range (previously certified, no longer in production).
Previously certified (out of production). This model appears in the EPA Certified Wood Heater Database but is no longer on the current certified list, which usually means it is no longer manufactured. The specifications below are its certified figures, kept for reference and for owners of installed units. Browse currently certified heaters for models sold new today.
| 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 | 1.9 g/hr |
|---|---|
| Carbon monoxide | 3.11 g/min |
| Efficiency (HHV) | 61 % |
|---|
| Heat output (low) | 20480 BTU/h |
|---|---|
| Heat output (high) | 24818 BTU/h |
| Firebox volume | 1.94 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | No |
| EPA certification number | 243-19a |
What space does the STUV AMERICA STUV 1668IN (2) suit?
- Its 24,818 BTU/h peak output covers roughly 700–1,000 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 2 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
- Morso Jernstoberi A/S 1410B (1.8 g/hr)
- Spartherm M 700 Series: Spartherm M 700 Insert (1.7 g/hr)
- Hearthstone Quality Home Heating Products Castleton 8031 (0.98 g/hr)
- FPI/Regency Fireplace Products F1500 (1 g/hr)
- MF Fire NOVA (1.9 g/hr)
- Blaze King Industries Princess PI29 Insert (1.3 g/hr)
Frequently asked questions
Is the STUV AMERICA STUV 1668IN (2) EPA certified?
The STUV AMERICA STUV 1668IN (2) holds EPA certification number 243-19a but is no longer on the current certified list — it is previously certified, which usually means the model is out of production. Already-installed units are unaffected by that status in most jurisdictions.
What is the STUV AMERICA STUV 1668IN (2)'s emission rate?
The STUV AMERICA STUV 1668IN (2) 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 STUV 1668IN (2) heat?
Roughly 700–1,000 sq ft, estimated from its 24,818 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 (2) 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 (2)'s certified efficiency is 61% 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)