Challenger MMX
Previously certified
EPA lists Challenger MMX under Reverso Manufacturing, Ltd. as a previously certified non-catalytic wood stove.
The listed emission rate is 2.6 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 | 2.6 grams per hour |
| HHV efficiency | Not listed |
| Heat output | 11,200–33,800 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.
- Challenger MMX
Other model lines from this manufacturer
No other model line in this snapshot uses this manufacturer string.
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
- 24IC — 2.6 grams per hour
- 41BCV, BBay, CD, CS, CV, CBAY, PCV, PCBAY — 2.6 grams per hour
- 50-TNC Timber Ridge 13-NCI/50-TNC131 (Insert) — 2.6 grams per hour
- Ashley AFS24, King K3, cat., freestanding/insert — 2.6 grams per hour
- Avalon Olympic, Liberty, Freedom Bay, Freedom Bay insert, Olympic insert — 2.6 grams per hour
HHV efficiency
EPA does not list an HHV efficiency to compare, or no other line lists one.
Heat output
- Clydesdale 8490 — 11,900–33,100 BTU/hr
- Clydesdale 8491 — 11,900–33,100 BTU/hr
- 1400 series (Napoleon 1400, 1400L, 1450,1401),S4, 1402 — 11,500–33,600 BTU/hr
- Ashley AFS24, King K3, cat., freestanding/insert — 10,300–34,600 BTU/hr
- O-2/90 — 10,800–34,100 BTU/hr
Reverso Manufacturing, Ltd. hub · EPA Certified Wood Heater Database