Independence PS21
Currently certified
EPA lists Independence PS21 under Freedom Stoves, LLC as a currently certified pellet stove.
The listed emission rate is 1.6 grams per hour.
The listed HHV efficiency is 78 percent.
Source: EPA Certified Wood Heater Database, snapshot 2026-10-23.
EPA rows
| Field | Row 1 |
|---|---|
| Status | Currently certified |
| Type | Pellet Stove |
| Subtype | Non-Catalytic Stove |
| Emission | 1.6 grams per hour |
| HHV efficiency | 78 percent |
| Heat output | 8,526–27,884 BTU/hr |
| Firebox | Not applicable |
| CO | 0 g/min |
| Certified fuel | Wood Pellets |
| 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.
- Independence PS21
Other model lines from this manufacturer
- Patriot PS24, Frontier PS25 Currently certified
Nearest model lines by EPA figures
Nearest means the smallest absolute difference on that EPA figure, among other Pellet Stove model lines that list it. Ties are ordered by model name.
Emission
- 10-CPM, 49-TRCPM, 49-SHCPM — 1.6 grams per hour
- 5710E, AP5710E, VG5710E, 5501SE, AP5501SE, VG5501SE, 5710-XHE, US513ME, Breckwell SP600, Comfort Glow CGPS2050 — 1.6 grams per hour
- Eclipse-P — 1.6 grams per hour
- Frontier II — 1.6 grams per hour
- Giulia Air, Valentina Air N — 1.6 grams per hour
HHV efficiency
- 5770E, AP5770E, VG5770E, US5770E, KP5770E, KP5770E-W, CGPS2100, DH3000, BHPS30 — 78 percent
- Castle Serenity 41278 — 78 percent
- Enviro M55-FS-2, Enviro M55C-FS-2, Enviro M55C-FPI-2, FPI GC60-2, and FPI GCI60-2 — 78 percent
- Francesca 2015, Monica 2015, RV 80 Ceramica — 78 percent
- Frontier II — 78 percent
Heat output
- Winrich Pellet Stove — 8,500–27,900 BTU/hr
- Prescott EXP, Prescott EXL — 6,293–30,089 BTU/hr
- 25-CBPAH, 55-SHPCBPAH, 55-TRPCBPAH — 11,099–25,123 BTU/hr
- EF2, Chatham, Davenport and Kinderhook — 10,190–25,989 BTU/hr
- Quadra-fire Santa Fe/Castile — 8,500–28,200 BTU/hr
Freedom Stoves, LLC hub · EPA Certified Wood Heater Database