Spartherm M 700 Series: Spartherm M 700 Insert
Spartherm M 700 Series: Spartherm M 700 Insert is a non-catalytic wood stove from Spartherm certified at 1.7 g/hr particulate emissions with 66% HHV efficiency and a 24,269–24,906 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | Spartherm M 700 Series: Spartherm M 700 Insert, Spartherm M 700 ZC, and Spartherm M 700 Module |
| Emission rate | 1.7 g/hr |
|---|---|
| Carbon monoxide | 1 g/min |
| Efficiency (HHV) | 66 % |
|---|
| Heat output (low) | 24269 BTU/h |
|---|---|
| Heat output (high) | 24906 BTU/h |
| Firebox volume | 1.58 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 379-24 |
What space does the Spartherm M 700 Series: Spartherm M 700 Insert suit?
- Its 24,906 BTU/h peak output covers roughly 700–1,000 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 1.58 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 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
- STUV AMERICA STUV 1668IN (2) (1.9 g/hr)
- Morso Jernstoberi A/S 1410B (1.8 g/hr)
- MF Fire NOVA (1.9 g/hr)
- Hearthstone Quality Home Heating Products Castleton 8031 (0.98 g/hr)
- Morso Jernstoberi A/S 2B Standard 2020 (0.55 g/hr)
- FPI/Regency Fireplace Products F1500 (1 g/hr)
Frequently asked questions
Is the Spartherm M 700 Series: Spartherm M 700 Insert EPA certified?
Yes, the Spartherm M 700 Series: Spartherm M 700 Insert is on the EPA's current list of certified wood heaters (certification number 379-24) and meets the 2020 NSPS Step 2 emission limits.
What is the Spartherm M 700 Series: Spartherm M 700 Insert's emission rate?
The Spartherm M 700 Series: Spartherm M 700 Insert 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 Spartherm M 700 Series: Spartherm M 700 Insert heat?
Roughly 700–1,000 sq ft, estimated from its 24,906 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 Spartherm M 700 Series: Spartherm M 700 Insert 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 Spartherm M 700 Series: Spartherm M 700 Insert's certified efficiency is 66% 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)