Foyers Supreme Astra 18 (2)
Foyers Supreme Astra 18 (2) is a non-catalytic wood stove from Foyers Supreme certified at 1.2 g/hr particulate emissions with 70% HHV efficiency and a 11,152–19,821 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | Astra 18, Elegance 30, Novo 18 – Soapstone, and Novo 18 – Cast Iron |
| Emission rate | 1.2 g/hr |
|---|---|
| Carbon monoxide | 1.8 g/min |
| Efficiency (HHV) | 70 % |
|---|
| Heat output (low) | 11152 BTU/h |
|---|---|
| Heat output (high) | 19821 BTU/h |
| Firebox volume | 1.56 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 137-18 |
What space does the Foyers Supreme Astra 18 (2) suit?
- Its 19,821 BTU/h peak output covers roughly 550–800 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 1.56 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 1.2 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
- Rais A/S Q-Tee II USA Series: Q-Tee II USA (0.7 g/hr)
- Foyers Supreme Lumis 22 – Soapstone (1.3 g/hr)
- Hearth and Home Technologies Vermont Castings Aspen C3 (2 g/hr)
- J. A. Roby Supero (1.5 g/hr)
- Rais A/S Nexo 100 ManualNexo 100 Classic Manual (1.1 g/hr)
- Spartherm L 800 ZC (1.3 g/hr)
Frequently asked questions
Is the Foyers Supreme Astra 18 (2) EPA certified?
Yes, the Foyers Supreme Astra 18 (2) is on the EPA's current list of certified wood heaters (certification number 137-18) and meets the 2020 NSPS Step 2 emission limits.
What is the Foyers Supreme Astra 18 (2)'s emission rate?
The Foyers Supreme Astra 18 (2) is certified at 1.2 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 Foyers Supreme Astra 18 (2) heat?
Roughly 550–800 sq ft, estimated from its 19,821 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 Foyers Supreme Astra 18 (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 Foyers Supreme Astra 18 (2)'s certified efficiency is 70% 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)