Stove Builder International SR-3.2 Series: St-Louis vs Travis Industries Liberty NexGen-Hybrid
The Travis Industries Liberty NexGen-Hybrid is the cleaner burner: 0.9 g/hr certified particulate emissions versus 1.8 g/hr. The Travis Industries Liberty NexGen-Hybrid is the more efficient unit: 80% versus 76% HHV — more heat from every cord. The Stove Builder International SR-3.2 Series: St-Louis produces more peak heat (83,857 vs 47,138 BTU/h), suiting roughly 2,400–3,350 sq ft. The Travis Industries Liberty NexGen-Hybrid has the larger firebox (4.14 vs 3.15 cu ft), which generally means longer burns between reloads. Combustion technology differs: the Stove Builder International SR-3.2 Series: St-Louis is a non-catalytic stove and the Travis Industries Liberty NexGen-Hybrid a catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| Stove Builder International SR-3.2 Series: St-Louis | Travis Industries Liberty NexGen-Hybrid | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Non-Catalytic Stove | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.8 g/hr | 0.9 g/hr |
| Efficiency (HHV) | 76 % | 80 % |
| Heat output (low) | 29605 BTU/h | 11598 BTU/h |
| Heat output (high) | 83857 BTU/h | 47138 BTU/h |
| Firebox volume | 3.15 cu ft | 4.14 cu ft |
| Carbon monoxide | 1.4 g/min | 0.484 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 398-25 | 381-24 |
| Test method | Alternate Test Method Used | — |
| Covered model numbers | SR-3.2 Series: St-Louis, Helia, Elevate, Chambly, HEA200 | Liberty NexGen-Hybrid |
Frequently asked questions
Which burns cleaner, the Stove Builder International SR-3.2 Series: St-Louis or the Travis Industries Liberty NexGen-Hybrid?
The Travis Industries Liberty NexGen-Hybrid: 0.9 g/hr certified particulate emissions versus 1.8 g/hr for the Stove Builder International SR-3.2 Series: St-Louis.
Are the Stove Builder International SR-3.2 Series: St-Louis and Travis Industries Liberty NexGen-Hybrid 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.