21 (FS21/Elite)
Previously certified
EPA lists 21 (FS21/Elite) under New Buck Corporation (Buck Stove Corp.) as a previously certified non-catalytic wood stove.
The listed emission rate is 4.4 grams per hour.
EPA does not list an HHV efficiency for this model line.
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 | 4.4 grams per hour |
| HHV efficiency | Not listed |
| Heat output | 12,000–44,400 BTU/hr |
| Firebox | Not listed |
| CO | Not listed |
| Certified fuel | Crib Wood |
| Test method | Not listed |
| 2020 NSPS | No |
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.
- 21 FS21/Elite
Other model lines from this manufacturer
- 21NC Currently certified
- 81C, Carolina 82C Currently certified
- Model 91, Carolina 92 Currently certified
- 18 Previously certified
- 20 Previously certified
- 261 Previously certified
- 41BCV, BBay, CD, CS, CV, CBAY, PCV, PCBAY Previously certified
- 50PCV, 50PBay, 50CV, 50CBay, 50CD, 50BCV, 50BBay Previously certified
- 71 Freestanding/Insert Previously certified
- 81/85 Previously certified
- 94NC Previously certified
- Bay 91 Previously certified
- Buck Bay 91 Previously certified
- Buck Carolina/Tharington 51/T-51/C82 Previously certified
- Buck Master Previously certified
- Buck/Tharrington 74/T-74 Previously certified
- Little Buck 26000-C Previously certified
- Model 74 Previously certified
- Model 81 Previously certified
- Model 91 Previously certified
- New Buck/Carolina 17 Previously certified
- Regular Buck 27000-C Previously certified
- Townsend III Previously certified
- XL-80 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
- 1710 — 4.4 grams per hour
- 2.5 ZC Series (2008) (Monaco, Stratford, Solution 2.5ZC, FP-10, Lafayette, WFP75, HE250, FP-12 Mundo) — 4.4 grams per hour
- ANSWER, ANSWER Insert, Republic1250 and Avalon Spokane — 4.4 grams per hour
- ANSWER/LOPI PATRIOT/LOPI PARLOR, Republic1250 and Avalon Spokane, Avalon Camano — 4.4 grams per hour
- C450, Tamarack — 4.4 grams per hour
HHV efficiency
EPA does not list an HHV efficiency to compare, or no other line lists one.
Heat output
- NZ3000H, TZ3000H — 14,215–42,203 BTU/hr
- 202 Palladian, 204 Keystone — 9,989–46,437 BTU/hr
- Vermont Castings Dauntless Flexburn Catalytic Model — 14,518–41,943 BTU/hr
- Fireplace Xtrordinair 44 Elite — 11,000–45,300 BTU/hr
- Shaker — 26,473–29,801 BTU/hr
New Buck Corporation (Buck Stove Corp.) hub · EPA Certified Wood Heater Database