FPI/Regency Fireplace Products F3500
FPI/Regency Fireplace Products F3500 is a catalytic wood stove from FPI/Regency Fireplace Products certified at 0.9 g/hr particulate emissions with 81% HHV efficiency and a 10,704–36,174 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 | Catalytic Stove |
| Certified fuel | Cord Wood |
| Covered model numbers | F3500 |
| Emission rate | 0.9 g/hr |
|---|---|
| Carbon monoxide | 0.39 g/min |
| Efficiency (HHV) | 81 % |
|---|
| Heat output (low) | 10704 BTU/h |
|---|---|
| Heat output (high) | 36174 BTU/h |
| Firebox volume | 3.04 cu ft |
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | No |
| EPA certification number | 166-18 |
What space does the FPI/Regency Fireplace Products F3500 suit?
- Its 36,174 BTU/h peak output covers roughly 1,050–1,450 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 3.04 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 Cord Wood — the test fuel closest to real-world firewood.
Similar wood stoves
- Jotul North America (Jotul U.S.A., Inc.) C550 V2 (1.1 g/hr)
- Hussong Manufacturing Company Kozy Heat Z42 (1.2 g/hr)
- Blaze King Industries 30.2 Series: Sirocco 30.2 (SC30.2) (0.81 g/hr)
- FPI/Regency Fireplace Products F5200 (2) (0.84 g/hr)
- 509 Fabrications Chinook VCV 2.1.5 (1.3 g/hr)
- Hearthstone Quality Home Heating Products Heritage 8024 (0.54 g/hr)
Frequently asked questions
Is the FPI/Regency Fireplace Products F3500 EPA certified?
The FPI/Regency Fireplace Products F3500 holds EPA certification number 166-18 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 FPI/Regency Fireplace Products F3500's emission rate?
The FPI/Regency Fireplace Products F3500 is certified at 0.9 grams of particulates per hour (tested with cord 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 FPI/Regency Fireplace Products F3500 heat?
Roughly 1,050–1,450 sq ft, estimated from its 36,174 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 FPI/Regency Fireplace Products F3500 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 FPI/Regency Fireplace Products F3500's certified efficiency is 81% 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)