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Specifically designed to face the rigors of winter, the Osburn 3500 is an essential for any spacious home, especially in harsh weather conditions. Despite its emissions of 1.6 g/h, this wood stove utilizes user-friendly, non-catalytic technology as well as a significant reduction in fuel consumption. The unit features a firebox that can hold up to 50 lb. of cordwood, as well as a blower, a thermodisc, and an airmate for optimal heat distribution and unparalleled comfort.
A choice of door overlay, a fire screen, and a glass ash lip are available as options..
| Fuel type | Dry cordwood (16" recommended) | |
| Recommended heating area-ft² | 1,000 - 2,700 | |
| Overall firebox volume-ft³ | 3.5 | |
| EPA loading volume-ft³ | 2.88 | |
| Maximum burn time | 10 h | |
| Maximum heat output-dry cordwood | 110,000 BTU/h (32.2 kW) | |
| Overall heat output rate < | 17,200 BTU/h (5.0 kW) to 57,800 BTU/h (16.9 kW) | |
| Average overall efficiency (dry cordwood) | 71 % (HHV) | 76 % (LHV) |
| Optimum overall efficiency | 77 % | |
| Optimum heat transfer efficiency | 75 % | |
| Average particulate emissions rate | 1.6 g/h | |
| Average CO | 73 g/h | |
| Combustion technology | Non-catalytic |
| High-efficiency certified appliance | Yes, EPA 2020 approved |
| Maximum log length | 22" |
| Log positioning | Loading over width and over depth |
| Chimney diameter | 6" |
| Flue outlet diameter | 6" |
| Type of chimney | CAN/ULC S629, UL 103 HT (2100 °F) |
| Minimum chimney height (feet) | 15' |
| Baffle type | C-Cast or equivalent |
| Approved for an alcove installation | Yes |
| Approved for a mobile home installation | Yes, with fresh air intake |
| Shipping Weight | 549 lb (249 kg) |
| Door type | Single, glass with cast iron frame |
| Glass type | Ceramic glass |
| Glass surface – dimensions (Width X Height) | 18 7/8" x 11 3/4" |
| Glass air-wash system | Yes |
| Premium quality blower included (CFM) | 130 |
| Overall dimension (Height) | 34 3/4" |
| Overall dimension (Width) | 28 7/8" |
| Overall dimension (Depth) | 33 1/2" |
| Door opening – dimension (Height) | 9 7/8" |
| Door opening - dimension (Width) | 19" |
| Firebox – dimension (Height) | 12 7/8" |
| Firebox – dimension (Width) | 22 7/8" |
| Firebox – dimension (Depth) | 20 1/8" |
| Firebox lined with refractory bricks for better heat distribution | Yes |
| Stainless-steel secondary-air system improving gas combustion | Yes |
| Model | Pedestal |
| Steel thickness – body | 3/16" |
| Steel thickness – top | 5/16" |
| USA standard (emissions) | EPA |
| Canadian Standard (emissions) | CSA B415.1-10 |
| USA standard (safety) | UL 1482, UL 737 |
| Canadian standard (safety) | ULC S627 |
| Tested and listed as per applicable standards | By an accredited laboratory (CAN/USA) |
| Warranty | Limited lifetime |
