Osburn Horizon Wood Fireplace | OB04010

Osburn Horizon Wood Fireplace | Model OB04010

The Osburn Horizon OB04010 is a large, high-efficiency built-in wood fireplace for substantial living areas and new fireplace installations. Its wide double-door viewing area creates the open, inviting presence of a traditional hearth while a modern combustion system supplies controlled, practical heat.

With a 4.28-cubic-foot firebox and a large fuel-loading opening, the Horizon suits households that want fewer reloads and an impressive view of the fire. Its included blower helps move warm air away from the fireplace, and optional faceplate styles make it easier to integrate the unit into a finished surround without losing its traditional character.

Who Should Choose the Osburn Horizon Wood Fireplace?

The Horizon is designed for a major fireplace project in a generous living area, not for simply sliding an insert into an existing masonry hearth. Its 4.28-cubic-foot combustion chamber accommodates a sizeable load of cordwood and the manufacturer publishes up to 11 hours of burn time under suitable conditions. For buyers comparing high-efficiency built-in fireplaces, the Horizon places particular emphasis on firebox capacity, a wide glass viewing area and the possibility of heating larger floor plans. Its 1,000 to 2,800 square foot guideline is a starting point rather than a promise of whole-home performance.

Plan the Horizon early in a remodel or new build: the approved 8-inch chimney system, chase construction, framing and noncombustible finish affect the design substantially. Osburn identifies the Prairie-style faceplate and molded refractory brick panels as required components in its listed configuration; verify which pieces are included in WoodStovePro's package before purchasing. The included blower helps deliver warmth to the room, while the fireplace's larger dimensions demand careful coordination with the surround and mantel layout.

Why Choose the Osburn Horizon Wood Fireplace?

• Large 4.28 cu. ft. firebox for full-size wood fires
• Double cast iron-framed glass doors and air-wash glass
• Included heat-circulation blower
• Choice of faceplate styles to suit the fireplace surround
• Non-catalytic combustion and EPA-certified performance

Osburn Horizon Wood Fireplace Specifications

• Manufacturer model: OB04010
• Manufacturer-recommended heating area: 1,000-2,800 sq. ft.
• Fuel: Dry cordwood (manufacturer recommends 16" pieces)
• Maximum heat output using dry cordwood: 95,000 BTU/h
• Tested overall heat output range: 16,900-43,000 BTU/h
• Maximum published burn time: Up to 11 hours
• Overall firebox volume: 4.28 cu. ft.
• EPA test loading volume: 4.28 cu. ft.
• Maximum log length: 25"
• Average overall efficiency (HHV): 64%
• Average overall efficiency (LHV): 69%
• Optimum overall efficiency: 70%
• Average particulate emissions: 1.6 g/h
• Overall dimensions (W x H x D): 50 3/4" x 43 3/8" x 31 3/4"
• Firebox interior dimensions (W x H x D): 25 3/8" x 17" x 17 7/8"
• Viewing glass size (W x H): 29 3/4" x 13 1/2"
• Door construction: Double glass doors, cast iron frames
• Shipping weight: 560 lb
• Flue outlet diameter: 8"
• Manufacturer minimum chimney height: 15 ft; verify complete installation requirements
• Blower: Included 176 CFM
• Mobile home approval: No
• 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

The Horizon is a factory-built, high-efficiency fireplace, not a drop-in insert for an existing masonry opening. Confirm the approved 8-inch chimney, framing, clearance and air-distribution requirements in the installation manual.

Frequently Asked Questions

Is the Horizon a wood insert or a built-in fireplace?

It is a factory-built wood fireplace intended for an approved framed installation. It is not a masonry-fireplace insert, and the framing, approved chimney and finishing details are different.

What makes the Horizon different from the Stratford II?

The Horizon has a larger 4.28-cubic-foot firebox and an 11-hour published maximum burn time, compared with the Stratford II's 2.5-cubic-foot firebox and 8-hour maximum. Choose by the room's heat loss, appearance and installation envelope, not only maximum BTU figures.

Can I connect it to a standard 6-inch stove pipe?

No. Osburn specifies an approved 8-inch chimney system for the Horizon. Confirm the exact listed chimney brand and component configuration in the current installation manual.

Osburn Manuals and PDF Resources

• Osburn Horizon 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 Horizon Wood Fireplace | OB04010, OBO4010, OB 04010, Osburn OB04010