Napoleon S25, Napoleon S25i, Timberwolf T25, Timberwolf T25i
Previously certified
EPA lists Napoleon S25, Napoleon S25i, Timberwolf T25, Timberwolf T25i under Wolf Steel Ltd. as a previously certified non-catalytic wood stove.
The listed emission rate is 1.3 grams per hour.
The listed HHV efficiency is 72 percent.
Source: EPA Certified Wood Heater Database, snapshot 2026-10-23.
EPA rows
| Field | Row 1 |
|---|---|
| Status | Previously certified |
| Type | Wood Stove |
| Subtype | Non-Catalytic Stove |
| Emission | 1.3 grams per hour |
| HHV efficiency | 72 percent |
| Heat output | 19,195–54,057 BTU/hr |
| Firebox | 2.51 cu ft |
| CO | 1.77 g/min |
| Certified fuel | Cord Wood |
| Test method | Not listed |
| 2020 NSPS | Yes |
Retail names in the model line
These are the names split from EPA's model cell. They are aliases for this line, not separate listings.
- Napoleon S25
- Napoleon S25i
- Timberwolf T25
- Timberwolf T25i
Other model lines from this manufacturer
- 1100 series (Napoleon 1100, 1100L, 1100C, 1150, 1101), S1 Previously certified
- 1400 series (Napoleon 1400, 1400L, 1450,1401),S4, 1402 Previously certified
- 2100 series (Timberwolf) Previously certified
- 2200 series (Timberwolf 2200, 2201) Previously certified
- EPI22 Previously certified
- EPI3 Previously certified
- Napoleon EPI3C, Napoleon EPI3T, Napoleon EPI3TN, Timberwolf TI3C-1, Timberwolf TI3T-1, Timberwolf TI3TN-1 Previously certified
- Napoleon S30, Timberwolf T30 Previously certified
- NPS45 Previously certified
- NZ3000H Previously certified
- NZ3000H, TZ3000H Previously certified
- Timberwolf 2100, Ambience AMB9000 (Outlander 15) Previously certified
- Timberwolf 2200, Timberwolf EPI22, Napoleon S20, Napoleon S20i, Timberwolf T20, Timberwolf T20i, Ambience 9010 (Outlander 19), Ambience 9100 (Outlander i19) Previously certified
- TPSI35 Previously certified
Nearest model lines by EPA figures
Nearest means the smallest absolute difference on that EPA figure, among other Wood Stove model lines that list it. Ties are ordered by model name.
Emission
- 1.7 Series - Archway 1700, Gateway 1700, Columbia II, Savannah II, Deco II, HEI170, HES170, FW2800 — 1.3 grams per hour
- 1.7 Series - Blackcomb II, Harmony 1.7, HEI170, HES170, Solution 1.7, Osburn 1700, Inspire 1700, Escape 1500, Escape 1500-I, Solution 1.7-I, Destination 1.7-I, Osburn 1700-I, Matrix 1700-I, Inspire 1700-I — 1.3 grams per hour
- 36 Elite — 1.3 grams per hour
- Ashford 20.1, Chinook 20.1, Sirocco 20.1 — 1.3 grams per hour
- Chinook Sirocco Ashford 20 — 1.3 grams per hour
HHV efficiency
- 15-W06, 50-SHW06, 50-SHW06L, 50TRW06, 15-W08, 50-SHW08, 50-SHW08L, 50TRW08 — 72 percent
- 2.3 Series (Archway 2300, FW2900, Gateway 2300, Green Mountain Insert 70, Escape 1800, Inspire 2000, Inspire 2000-I, Matrix, Escape 1800-I, Osburn 2000, Osburn 2000-I, Harmony 2.3, Solution 2.3, Solution 2.3-I, CW2900, Destination 2.3-I, Matrix-I, HES240, HEI240, Heritage, Deco Alto, Harmony 2.3-I, Blue Ridge 300P, Blue Ridge 300L, and Blue Ridge 300-I) — 72 percent
- 36 Elite — 72 percent
- 50TL — 72 percent
- Answer — 72 percent
Heat output
- Model 81 — 13,795–59,490 BTU/hr
- Model 91 — 10,367–62,745 BTU/hr
- 2.5R Series (Solution 2.5 ZC II, Stratford II, FP10 Lafayette II, FP12 Mundo II, HE250R, Destination 2.7, Matrix 2700, FP10 Lafayette IIS, WFP-75 8411, HE275, HE275CF, Green Mountain Insert 90 8460, St. Clair 2500) — 12,700–60,700 BTU/hr
- Pioneer, Galileo, Score, Magellan, Hubble, Messenger, Apollo, Gemini, Spirit, Kepler, Kocher, Cocinera, Fornello, Kouzina, Kuchenka, Komfyr, Hubble(R), Apollo(R), Gemini(R), Spirit(R), Kepler(R) — 18,372–55,107 BTU/hr
- F35 — 13,533–59,443 BTU/hr