Kuma Stove And Iron Works K-250 Series Ashwood LE
Kuma Stove And Iron Works K-250 Series Ashwood LE is a hybrid (catalytic + secondary burn) wood stove from Kuma Stove And Iron Works certified at 1.1 g/hr particulate emissions with 79% HHV efficiency and a 11,196–30,308 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 | Hybrid |
| Certified fuel | Cord Wood |
| Covered model numbers | K-250 Series Ashwood LE, Wood Classic LE, Cambridge LE, Cascade LE |
| Emission rate | 1.1 g/hr |
|---|---|
| Carbon monoxide | 0.183 g/min |
| Efficiency (HHV) | 79 % |
|---|
| Heat output (low) | 11196 BTU/h |
|---|---|
| Heat output (high) | 30308 BTU/h |
| Firebox volume | 2.5 cu ft |
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | No |
| EPA certification number | 181-19 |
What space does the Kuma Stove And Iron Works K-250 Series Ashwood LE suit?
- Its 30,308 BTU/h peak output covers roughly 850–1,200 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 2.5 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 1.4 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
- Pacific Energy Fireplace Products Limited TN25 C (1.1 g/hr)
- Kuma Stove And Iron Works K-181 Series: Aspen LE-1 (1.1 g/hr)
- Blaze King Industries Princess PE32 (0.4 g/hr)
- Hearth and Home Technologies Quadra-Fire 31M-ACC-C (1.9 g/hr)
- Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) (1.1 g/hr)
- Travis Industries Evergreen NexGen-Hybrid Free-Standing (1.2 g/hr)
Frequently asked questions
Is the Kuma Stove And Iron Works K-250 Series Ashwood LE EPA certified?
The Kuma Stove And Iron Works K-250 Series Ashwood LE holds EPA certification number 181-19 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 Kuma Stove And Iron Works K-250 Series Ashwood LE's emission rate?
The Kuma Stove And Iron Works K-250 Series Ashwood LE is certified at 1.1 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 Kuma Stove And Iron Works K-250 Series Ashwood LE heat?
Roughly 850–1,200 sq ft, estimated from its 30,308 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 Kuma Stove And Iron Works K-250 Series Ashwood LE 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 Kuma Stove And Iron Works K-250 Series Ashwood LE's certified efficiency is 79% 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)