Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681)
Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) is a hybrid (catalytic + secondary burn) wood stove from Hearthstone Quality Home Heating Products certified at 0.53 g/hr particulate emissions with 80% HHV efficiency and a 14,846–33,424 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Hybrid |
| Certified fuel | Crib Wood |
| Covered model numbers | Green Mountain 80-1 (Model 8681), Okemo (Model 8380), Hipster 30 (Model 8280) |
| Emission rate | 0.53 g/hr |
|---|---|
| Carbon monoxide | 0.2 g/min |
| Efficiency (HHV) | 80 % |
|---|
| Heat output (low) | 14846 BTU/h |
|---|---|
| Heat output (high) | 33424 BTU/h |
| Firebox volume | 3.16 cu ft |
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 390-25 |
What space does the Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) suit?
- Its 33,424 BTU/h peak output covers roughly 950–1,350 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 3.16 cu ft firebox puts it in the large-home, overnight-burn class.
- Rough fuel use: about 1.6 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 .
Compare the Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681)
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs Blaze King Industries 20.2 Series: Ashford 20.2 (AF20.2)
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs Blaze King Industries 25 Series: Sirocco 25 (SC25) Insert
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs Blaze King Industries 30.2 Series: Sirocco 30.2 (SC30.2)
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs Blaze King Industries King KE40 (3)
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs Blaze King Industries Princess PE32 (2)
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs Blaze King Industries Princess PI29 Insert (2)
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R
- Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) vs FPI/Regency Fireplace Products CI2700-1
Similar wood stoves
- Hearthstone Quality Home Heating Products Green Mountain 80 8680 (0.67 g/hr)
- United States Stove Company US1261E (1.9 g/hr)
- Hearthstone Quality Home Heating Products Green Mountain 60 8660 (0.6 g/hr)
- FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R (0.95 g/hr)
- United States Stove Company US1800E (1.8 g/hr)
- Hearthstone Quality Home Heating Products Manchester 8362 (0.65 g/hr)
Frequently asked questions
Is the Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) EPA certified?
Yes, the Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) is on the EPA's current list of certified wood heaters (certification number 390-25) and meets the 2020 NSPS Step 2 emission limits.
What is the Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681)'s emission rate?
The Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) is certified at 0.53 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 Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) heat?
Roughly 950–1,350 sq ft, estimated from its 33,424 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 Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681) 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 Hearthstone Quality Home Heating Products Green Mountain 80-1 (Model 8681)'s certified efficiency is 80% 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)