Osburn 3500 Wood Stove OB03500 Heats 1000-2700 sqr ft, 22-inch log, 110,000 BTU’s, 77% efficiency, 3.5 Cu. Ft Fire box, 549 lbs
Specifically designed to face the rigor of winter, the Osburn 3500 is essential for any spacious home, especially in harsh weather conditions. Despite its emissions of 1.6 g/h, this wood stove utilizes a user-friendly, non-catalytic technology and significantly reduces 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 airdate for optimal heat distribution and unparalleled comfort.
What’s Included
- 3500 Wood Stove Assembly
- Door Overlays (Required)
Not Included
- Air Intake Kit
- Venting Kit and Accessories
Features
- Construction & Durability: Made from black metallic carbon steel, providing long-term durability
- Heat Distribution: Equipped with heavy-duty ceramic bricks for even heat distribution
- Combustion Efficiency: Features a unique vacuum design for efficient combustion, reducing creosote build-up on the glass
- Secondary Air System: Creates a second combustion zone to enhance fuel efficiency and cleaner burning
- Fuel Type: Uses dry cordwood with a recommended maximum log length
- Approved for a mobile home installation
Specifications
| 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 |
Appliance Performance
| 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 |
Clearance
| Minimum clearances to combustibles* (Data expressed in inches. 1 inch = 25.4 mm) |
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| Canada | United-States | |||
| Single wall pipe | Double wall pipe | Single wall pipe | Double wall pipe | |
| Clearance – back wall | 13 1/4″ | 6″ | 13″ | 6″ |
| Clearance – corner | 7 1/4″ | 7″ | 7 1/4″ | 7″ |
| Clearance – side wall | 14″ | 14″ | 14″ | 14″ |
| Clearance – top (measured from the platform on which the appliance is installed)** | 84″ | 84″ | 84″ | 84″ |
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* The information given on the certification label affixed to the appliance always overrides the information published in any other media (owner’s manual, catalogs, flyers, magazines, and/or websites). |
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** Some appliances have been tested with a low ceiling. Before setting up your unit, refer to the installation manual. |
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