Blaze King Industries Princess PI29 Insert (2) vs Hearth and Home Technologies Quadra-Fire 21M-ACC-C
The Blaze King Industries Princess PI29 Insert (2) is the cleaner burner: 1 g/hr certified particulate emissions versus 1.7 g/hr. The Blaze King Industries Princess PI29 Insert (2) is the more efficient unit: 80% versus 76% HHV — more heat from every cord. The Blaze King Industries Princess PI29 Insert (2) produces more peak heat (30,194 vs 29,322 BTU/h), suiting roughly 850–1,200 sq ft. The Blaze King Industries Princess PI29 Insert (2) has the larger firebox (2.63 vs 1.48 cu ft), which generally means longer burns between reloads. Combustion technology differs: the Blaze King Industries Princess PI29 Insert (2) 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 Princess PI29 Insert (2) | 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) | 80 % | 76 % |
| Heat output (low) | 9023 BTU/h | 13585 BTU/h |
| Heat output (high) | 30194 BTU/h | 29322 BTU/h |
| Firebox volume | 2.63 cu ft | 1.48 cu ft |
| Carbon monoxide | 0.704 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 | 123-18 | 250-20 |
| Covered model numbers | Princess PI29 Insert | Quadra-Fire 21M-ACC-C, Discovery-1-C, FF-WP-100 |
Frequently asked questions
Which burns cleaner, the Blaze King Industries Princess PI29 Insert (2) or the Hearth and Home Technologies Quadra-Fire 21M-ACC-C?
The Blaze King Industries Princess PI29 Insert (2): 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 Princess PI29 Insert (2) 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.