Osburn Horizon Wood Fireplace - OB04010


Beyond the Size!
This wood fireplace offers peace of mind due to the combination of energy efficiency and clean heating. A simple solution; its clean design suits any type of decor.

Large fireplace. Behind its large glass door, the 4.28 cubic foot combustion chamber can hold an impressive 60 lbs of wood.

Low emissions. This energy efficient fireplace complies with the EPA’s clean-air standards (only 1.6 g/hr of emissions).

High efficiency. The Horizon fireplace is capable of heating large spaces and burns for 10 hours.

Fuel type: Dry cordwood
Recommended heating area (sq.ft.): (*) 1,000 - 2,800
Overall firebox volume: 4.28
Maximum burn time: (*) 10 h
Maximum heat output (dry cordwood): (2) 95,000 BTU/h (27.8 kW)
Overall heat output rate (min. to max.): (2) (3) 16,610 BTU/h (4.9 kW) to 43,021 BTU/h (12.6 kW)
Average overall efficiency (EPA cribs / Douglas fir): (3) N.A. (HHV) (4) N.A. (LHV) (5)
Average overall efficiency (dry cordwood): (3) 63.9 % (HHV) (4) 68.4 % (LHV) (5)
Optimum efficiency : (6) (7) 69.7 %
Average particulate emissions rate : (8) 1.6 g/h
Average CO : (9) 157.4 g/h
(*) Recommended heating area and maximum burn time may vary subject to location in home, chimney draft,heat loss factors, climate, fuel type and other variables. The recommended heated area for a given appliance is defined by the manufacturer as its capacity to maintain a minimum acceptable temperature in the designated area in case of a power failure.
(1) Values are as measured per test method, except for the recommended heating area, firebox volume, maximum burn time and maximum heat output.
(2) The maximum heat output (dry cordwood) is based on a loading density varying between 15 lb/ft³ and 20 lb/ft³. Other performances are based on a fuel load prescribed by the standard. The specified loading density varies between 7 lb/ft³ and 12 lb/ft³. The moisture content is between 19% and 25%.
(3) As measured per CSA B415.1-10 stack loss method.
(4) Higher Heating Value of the fuel.
(5) Lower Heating Value of the fuel.
(6) Performances based on a fuel load prescribed by the standard at 7 lb/ft³ and with a moisture content between 19% and 25%.
(7) Optimum overall efficiency at a specific burn rate (LHV).
(8) This appliance is officially tested and certified by an independent agency.
(9) Carbon monoxide.

Horizon Wood Fireplace Features:
Combustion technology: Non-catalytic
High-efficiency EPA certified appliance: Yes, EPA 2020 approved
Maximum log length: 25"
Log positioning: Over width
Chimney diameter: 8"
Flue outlet diameter: 8"
Type of chimney: CAN/ULC S604, UL 103 (1700 °F) - CAN/ULC S629, UL 103 HT (2100 °F)
Minimum chimney height (feet): 15'
Baffle type: C-Cast
Approved for an alcove installation: N.A.
Approved for a mobile home installation: No
Shipping Weight: 550 lb (250 kg)
Door type: Double, glass with cast iron frame
Glass type: Ceramic glass
Glass surface – dimensions (Width X Height): 29 3/4" X 13 1/2"
Glass air-wash system: Yes
Premium quality blower included (CFM): 176
Overall dimension (Height): 43 3/8"
Overall dimension (Width): 50 3/4"
Overall dimension (Depth): 31 3/4"
Door opening – dimension (Height): 12 3/4"
Door opening - dimension (Width): 33"
Firebox – dimension (Height): 17"
Firebox – dimension (Width): 25 3/8"
Firebox – dimension (Depth): 17 7/8"
Moulded refractory bricks: Yes
Stainless-steel secondary-air system improving gas combustion: Yes
USA standard (emissions): EPA / ASTM WK47329
Canadian Standard (emissions): CSA B415.1-10
USA standard (safety): UL 127
Canadian standard (safety): ULC-S610
Tested and listed as per applicable standards: By an accredited laboratory (CAN/USA)
Warranty: Limited lifetime
Other Models: OB04010K (Add option: Chimney Lengths - 4 Lengths Of 8" x 36" Chimney)

Click to see the Osburn Horizon Manual

(EPA 2020) OB04010 (773388128894), OB04010K (773388131825)

California residents please click on the link for information on Proposition 65 BEFORE purchasing.

Supply chain disruptions have greatly impacted inventory levels in our industry, as well as in many other organizations across the globe. We want to personally acknowledge these shifts in supply levels have affected our ability to surpass your expectations in many situations for prompt delivery of your order. Should you not be able to wait for supply delays, please contact us about stock levels before ordering. As always, we thank you for your business!