Blaze King Industries King KE40 (3) vs Hearth and Home Technologies Quadra-Fire 21M-ACC-C
The Blaze King Industries King KE40 (3) is the cleaner burner: 1 g/hr certified particulate emissions versus 1.7 g/hr. The Blaze King Industries King KE40 (3) is the more efficient unit: 81% versus 76% HHV — more heat from every cord. The Blaze King Industries King KE40 (3) produces more peak heat (38,516 vs 29,322 BTU/h), suiting roughly 1,100–1,550 sq ft. The Blaze King Industries King KE40 (3) has the larger firebox (4.55 vs 1.48 cu ft), which generally means longer burns between reloads. Combustion technology differs: the Blaze King Industries King KE40 (3) is a catalytic stove and the Hearth and Home Technologies Quadra-Fire 21M-ACC-C a non-catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| Blaze King Industries King KE40 (3) | Hearth and Home Technologies Quadra-Fire 21M-ACC-C | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1 g/hr | 1.7 g/hr |
| Efficiency (HHV) | 81 % | 76 % |
| Heat output (low) | 10392 BTU/h | 13585 BTU/h |
| Heat output (high) | 38516 BTU/h | 29322 BTU/h |
| Firebox volume | 4.55 cu ft | 1.48 cu ft |
| Carbon monoxide | 0.49 g/min | 1.5 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 220-19 | 250-20 |
| Covered model numbers | King KE40 | Quadra-Fire 21M-ACC-C, Discovery-1-C, FF-WP-100 |
Frequently asked questions
Which burns cleaner, the Blaze King Industries King KE40 (3) or the Hearth and Home Technologies Quadra-Fire 21M-ACC-C?
The Blaze King Industries King KE40 (3): 1 g/hr certified particulate emissions versus 1.7 g/hr for the Hearth and Home Technologies Quadra-Fire 21M-ACC-C.
Are the Blaze King Industries King KE40 (3) and Hearth and Home Technologies Quadra-Fire 21M-ACC-C both EPA certified?
Yes — both appear on the U.S. EPA's current list of certified wood heaters, and every figure on this page comes from their certification records.