Hearth and Home Technologies Quadra-Fire 21M-ACC-C
Hearth and Home Technologies Quadra-Fire 21M-ACC-C is a non-catalytic wood stove from Hearth and Home Technologies certified at 1.7 g/hr particulate emissions with 76% HHV efficiency and a 13,585–29,322 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | Quadra-Fire 21M-ACC-C, Discovery-1-C, FF-WP-100 |
| Emission rate | 1.7 g/hr |
|---|---|
| Carbon monoxide | 1.5 g/min |
| Efficiency (HHV) | 76 % |
|---|
| Heat output (low) | 13585 BTU/h |
|---|---|
| Heat output (high) | 29322 BTU/h |
| Firebox volume | 1.48 cu ft |
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 250-20 |
What space does the Hearth and Home Technologies Quadra-Fire 21M-ACC-C suit?
- Its 29,322 BTU/h peak output covers roughly 850–1,150 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 1.48 cu ft firebox puts it in the small/cabin class.
- Rough fuel use: about 1.5 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 Hearth and Home Technologies Quadra-Fire 21M-ACC-C
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs Blaze King Industries 20.2 Series: Ashford 20.2 (AF20.2)
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs Blaze King Industries 25 Series: Sirocco 25 (SC25) Insert
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs Blaze King Industries 30.2 Series: Sirocco 30.2 (SC30.2)
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs Blaze King Industries King KE40 (3)
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs Blaze King Industries Princess PE32 (2)
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs Blaze King Industries Princess PI29 Insert (2)
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R
- Hearth and Home Technologies Quadra-Fire 21M-ACC-C vs FPI/Regency Fireplace Products CI2700-1
Similar wood stoves
- Foyers Supreme Astra 32 (1.5 g/hr)
- United States Stove Company US1269E (1.8 g/hr)
- Pacific Energy Fireplace Products Limited True North TN20 Series B (1.6 g/hr)
- Pacific Energy Fireplace Products Limited TN25 C (1.1 g/hr)
- Spartherm M 700 Insert (1.1 g/hr)
- Kuma Stove And Iron Works K-181 Series: Aspen LE-1 (1.1 g/hr)
Frequently asked questions
Is the Hearth and Home Technologies Quadra-Fire 21M-ACC-C EPA certified?
Yes, the Hearth and Home Technologies Quadra-Fire 21M-ACC-C is on the EPA's current list of certified wood heaters (certification number 250-20) and meets the 2020 NSPS Step 2 emission limits.
What is the Hearth and Home Technologies Quadra-Fire 21M-ACC-C's emission rate?
The Hearth and Home Technologies Quadra-Fire 21M-ACC-C 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 Hearth and Home Technologies Quadra-Fire 21M-ACC-C heat?
Roughly 850–1,150 sq ft, estimated from its 29,322 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 Hearth and Home Technologies Quadra-Fire 21M-ACC-C 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 Hearth and Home Technologies Quadra-Fire 21M-ACC-C's certified efficiency is 76% 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)