Osburn 3500 Wood Insert OB03510
Fuel type: Dry cordwood
Recommended heating area: 1,000 – 2,700 square feet
Maximum heat output: 110,000 BTU/h
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Description
The Osburn 3500 Wood Insert (OB03510) is a high-performance fireplace insert designed to heat spaces from 1,000 to 2,700 square feet. EPA 2020 approved and built for installation into a masonry fireplace, this powerful wood insert delivers up to 110,000 BTUs of heat with long burn times and efficient, clean-burning performance.
With its large 3.5 cu. ft. firebox, extended burn capacity, and wide viewing area, the Osburn 3500 Wood Insert is ideal for large homes and open spaces that require maximum heat output. Its non-catalytic combustion system and included blower help distribute heat evenly while maintaining low emissions.
Key Features: Non-catalytic combustion, heats 1,000–2,700 sq ft, accepts up to 22″ logs, up to 110,000 BTUs, up to 77% efficiency, 3.5 cu. ft. firebox, and included blower.
Specs
Installation: Must be installed into a masonry fireplace.
| Fuel type: | Dry cordwood |
| Heating area: | 1,000 – 2,700 sq ft |
| Firebox volume: | 3.5 cu ft |
| Burn time: | Up to 10 hours |
| Maximum heat output: | 110,000 BTU/h |
| Efficiency: | Up to 77% |
| Emissions: | ~1.6 g/h |
