Osburn 3500 Wood Stove With Blower | OB03500

Osburn 3500 Wood Stove with Blower | Model OB03500

The Osburn 3500 OB03500 is a large-capacity freestanding wood stove aimed at substantial heating loads and long winter evenings. Its 3.5-cubic-foot firebox accommodates meaningful cordwood loads, making it a practical option for larger homes and colder climates.

Non-catalytic combustion keeps everyday operation straightforward, while the included blower, thermodisc and airmate help manage the movement of warm air. A glass-fronted cast iron door provides a clear view of the fire, with optional door overlays and other finishing details available to personalize the stove without changing its heating focus.

Is the Osburn 3500 a Good Fit for Your Heating Needs?

Consider the 3500 when a medium-size stove would require inconveniently frequent loading or struggle with a substantial heating demand. Its 3.5-cubic-foot firebox accepts longer cordwood than the 1700 and 2000 series, and Osburn advertises up to 10 hours of burn time under suitable conditions. The stated heating range is 1,000 to 2,700 square feet, making it a strong candidate for larger homes or colder climates with appropriate insulation and chimney draft. It is not automatically the best option for a small, well-insulated room, where a smaller stove may be easier to manage.

Plan for both the stove's footprint and the working space needed to handle longer fuel pieces. A blower, thermodisc and airmate are included; the thermodisc supports temperature-based fan operation. Its 6-inch flue outlet does not mean any existing 6-inch chimney is automatically suitable: confirm height, listing, condition and all required clearances. Osburn offers optional door-overlay and ash-lip treatments, so check the ordered package before comparing a showroom photograph with the delivered unit.

Why Choose the Osburn 3500 Wood Stove with Blower?

• Generous 3.5 cu. ft. firebox for large wood loads
• Up to 110,000 BTU/h published maximum output with dry cordwood
• Blower, thermodisc and airmate included
• Optional door overlay and firescreen
• Non-catalytic EPA-certified combustion

Osburn 3500 Wood Stove with Blower Specifications

• Manufacturer model: OB03500
• Manufacturer-recommended heating area: 1,000-2,700 sq. ft.
• Fuel: Dry cordwood (manufacturer recommends 16" pieces)
• Maximum heat output using dry cordwood: 110,000 BTU/h
• Tested overall heat output range: 17,200-57,800 BTU/h
• Maximum published burn time: Up to 10 hours
• Overall firebox volume: 3.5 cu. ft.
• EPA test loading volume: 2.88 cu. ft.
• Maximum log length: 22"
• Average overall efficiency (HHV): 71%
• Average overall efficiency (LHV): 76%
• Optimum overall efficiency: 77%
• Average particulate emissions: 1.6 g/h
• Overall dimensions (W x H x D): 28 7/8" x 34 3/4" x 33 1/2"
• Firebox interior dimensions (W x H x D): 22 7/8" x 12 7/8" x 20 1/8"
• Viewing glass size (W x H): 18 7/8" x 11 3/4"
• Door construction: Single glass door, cast iron frame
• Shipping weight: 549 lb
• Flue outlet diameter: 6"
• Manufacturer minimum chimney height: 15 ft; verify complete installation requirements
• Blower: Included 130 CFM
• Mobile home approval: Yes
• Combustion technology: Non-catalytic
• EPA listing: EPA 2020 approved (per manufacturer Specs/Manual)
• Manufacturer warranty: Limited lifetime; see written warranty for terms

Manufacturer figures are reference values, not guaranteed heating results. Maximum BTU output, tested output rates and burn-time estimates use different conditions; real performance depends on fuel quality, chimney draft, climate, home heat loss and operating settings. Confirm all dimensions and listed installation clearances in the current manual before ordering.

Installation and Compatibility

For a high-output stove of this size, verify chimney design, protected-floor dimensions and required clearances against the actual installation layout. Heating results depend on insulation, climate, fuel and house configuration.

Frequently Asked Questions

How much larger is the 3500 than the Osburn 2000?

The 3500 has a 3.5-cubic-foot firebox versus 2.4 cubic feet for the 2000, plus a longer 10-hour published maximum burn time compared with 8 hours. Actual heat needs still govern the correct size.

Is the blower an extra accessory?

No. The 3500 is offered with a 130 CFM blower, thermodisc and airmate. Optional trim items are separate from these standard heat-circulation components.

Does the 110,000 BTU/h rating mean constant output?

No. That is Osburn's maximum dry-cordwood output figure, not steady heat at every burn setting. Its manufacturer-listed tested delivered-output range provides additional context for real heating comparisons.

Osburn Manuals and PDF Resources

• Osburn 3500 Wood Stove Owner's Manual (PDF)

Questions about fireplace fit, venting or compatible accessories? Contact WoodStovePro at info@woodstovepro.com or 888-418-0005 before placing your order.

California residents: Review Proposition 65 information before purchasing.

Tags: Osburn 3500 Wood Stove | OB03500, OBO3500, OB 03500, Osburn OB03500