Blaze King Industries Princess PI29 Insert (2) vs Stove Builder International 1.4 Series (Osburn 950
The Blaze King Industries Princess PI29 Insert (2) is the cleaner burner: 1 g/hr certified particulate emissions versus 1.8 g/hr. The Blaze King Industries Princess PI29 Insert (2) is the more efficient unit: 80% versus 74% HHV — more heat from every cord. The Blaze King Industries Princess PI29 Insert (2) produces more peak heat (30,194 vs 26,500 BTU/h), suiting roughly 850–1,200 sq ft. The Blaze King Industries Princess PI29 Insert (2) has the larger firebox (2.63 vs 1.55 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 Stove Builder International 1.4 Series (Osburn 950 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) | Stove Builder International 1.4 Series (Osburn 950 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Cord Wood |
| Emission rate | 1 g/hr | 1.8 g/hr |
| Efficiency (HHV) | 80 % | 74 % |
| Heat output (low) | 9023 BTU/h | 12100 BTU/h |
| Heat output (high) | 30194 BTU/h | 26500 BTU/h |
| Firebox volume | 2.63 cu ft | 1.55 cu ft |
| Carbon monoxide | 0.704 g/min | 1.2 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | No |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 123-18 | 289-21 |
| Covered model numbers | Princess PI29 Insert | 1.4 Series (Osburn 950, Escape 1200, Gateway 1400, Solution 1.4, Spark II, Fox, Déco Nano, S250, Harmony 1.4, HES140, Blue Ridge 100) |
Frequently asked questions
Which burns cleaner, the Blaze King Industries Princess PI29 Insert (2) or the Stove Builder International 1.4 Series (Osburn 950?
The Blaze King Industries Princess PI29 Insert (2): 1 g/hr certified particulate emissions versus 1.8 g/hr for the Stove Builder International 1.4 Series (Osburn 950.
Are the Blaze King Industries Princess PI29 Insert (2) and Stove Builder International 1.4 Series (Osburn 950 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.