RSF Focus 320+; Onyx2+
Previously certified
EPA lists RSF Focus 320+; Onyx2+ under RSF / Industrial Chimney Company, Incorporated as a previously certified non-catalytic wood stove.
The listed emission rate is 3.1 grams per hour.
The listed HHV efficiency is 64 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 | 3.1 grams per hour |
| HHV efficiency | 64 percent |
| Heat output | 11,200–28,400 BTU/hr |
| Firebox | Not listed |
| CO | Not listed |
| Certified fuel | Not listed |
| 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.
- RSF Focus 320+
- Onyx2+
Other model lines from this manufacturer
- Focus 320 SBR, Onyx SBR Currently certified
- OPEL PLUS Series: Opel+ 2C, Opel+ 3C, Opel+ 4C, Opel+ Keystone, Opel+ Keystone-AK Currently certified
- RSF 3600B Series: Pearl 3600B, Perle 3600B, Focus 3600B, Focus 3600Bi Currently certified
- Delta Fusion Previously certified
- ONYX AP Previously certified
- ONYX, Focus 320 Previously certified
- Opel 2000C, OPEL AP Previously certified
- RSF 3600 Series: Pearl 3600, Perle 3600, Focus 3600, Focus 3600i, Focus 3600s Previously certified
- RSF Opel2C, Opel3C, Opel4C Previously certified
- TOPAZ/CHAEMELON (With Fan), FOCUS 250, PEARL/PERLE Previously certified
- TOPAZ/CHAMELEON (Without Fan), FOCUS 250, PEARL/PERLE 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
- 100B 90 32 TV — 3.1 grams per hour
- 18 — 3.1 grams per hour
- 2500 ST — 3.1 grams per hour
- 2500, SW3100 — 3.1 grams per hour
- 3112 and 3142 — 3.1 grams per hour
HHV efficiency
- 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) — 64 percent
- 2469E — 64 percent
- Cook, Cicero, Chief, Cuistot, Elda, Marmiton — 64 percent
- Fusion FN — 64 percent
- HE350, FP-15-Waterloo, Horizon, Monaco XL, WFP100, FP-15A Waterloo, St. Clair 4300, Solution 4.5 ZC — 64 percent
Heat output
- Shaker — 18,218–21,399 BTU/hr
- 360-CR — 10,600–29,100 BTU/hr
- Ashwood — 11,400–28,100 BTU/hr
- Country Hearth, Vogelzang, Breckwell TR002, 1100, and 1100EC — 8,700–30,800 BTU/hr
- Dutchwest DW1500L02 — 10,300–29,200 BTU/hr
RSF / Industrial Chimney Company, Incorporated hub · EPA Certified Wood Heater Database