Delta Fusion
Previously certified
EPA lists Delta Fusion under RSF / Industrial Chimney Company, Incorporated as a previously certified non-catalytic wood stove.
The listed emission rate is 1.3 grams per hour.
The listed HHV efficiency is 60 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 | 60 percent |
| Heat output | 33,721–34,057 BTU/hr |
| Firebox | 4.04 cu ft |
| CO | 2.38 g/min |
| Certified fuel | Crib 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.
- Delta Fusion
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
- 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 Focus 320+; Onyx2+ 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
- 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
- Ladera-D, WRT3920-B — 59 percent
- Montecito-C Series: Montecito-C, WCT6920WSS, Bainbridge-B, WCT4920WSS — 61 percent
- Spartherm S 600 Insert, Spartherm S 600 ZC, Spartherm S 600 Module — 62 percent
- Brass Flame KS-805 — 63 percent
- FP16 LE, FP16 AR LE — 63 percent
Heat output
- F2450 — 14,179–53,563 BTU/hr
- Everest II Series HE300 II, HE325, Everest II, St. Clair 3000 — 18,057–49,654 BTU/hr
- E1-6, E1-I — 12,400–55,300 BTU/hr
- CJW2500X02, DW2500 and JW2500X10 — 9,500–57,800 BTU/hr
- CW2500X00, CW2500X02, JW2500X00, — 9,500–57,800 BTU/hr
RSF / Industrial Chimney Company, Incorporated hub · EPA Certified Wood Heater Database