J. A. Roby Polaris
J. A. Roby Polaris is a non-catalytic wood stove from J. A. Roby certified at 1.4 g/hr particulate emissions with 73% HHV efficiency and a 11,527–21,846 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | Polaris, Centauri, Vega, Sirius, Antares, Rigel |
| Emission rate | 1.4 g/hr |
|---|---|
| Carbon monoxide | 1.3 g/min |
| Efficiency (HHV) | 73 % |
|---|
| Heat output (low) | 11527 BTU/h |
|---|---|
| Heat output (high) | 21846 BTU/h |
| Firebox volume | 1.55 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 38-16 |
What space does the J. A. Roby Polaris suit?
- Its 21,846 BTU/h peak output covers roughly 600–850 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 1.55 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
- J. A. Roby Cook (1.9 g/hr)
- Wittus Shaker (1.8 g/hr)
- Hearth and Home Technologies Heat & Glo Pioneer-II-ARC (1.7 g/hr)
- Hearth and Home Technologies Vermont Castings by Forge and Flame Dauntless-C (1.7 g/hr)
- Spartherm S 600 Insert (2) (1.8 g/hr)
- Foyers Supreme Fusion 18 18FN (1.9 g/hr)
Frequently asked questions
Is the J. A. Roby Polaris EPA certified?
Yes, the J. A. Roby Polaris is on the EPA's current list of certified wood heaters (certification number 38-16) and meets the 2020 NSPS Step 2 emission limits.
What is the J. A. Roby Polaris's emission rate?
The J. A. Roby Polaris is certified at 1.4 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 J. A. Roby Polaris heat?
Roughly 600–850 sq ft, estimated from its 21,846 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 J. A. Roby Polaris 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 J. A. Roby Polaris's certified efficiency is 73% 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)