Empire Outside Air Kit and Duct for Blackburn Wood Fireboxes
The Empire WBOAK outside air kit brings outside combustion air to a Blackburn wood burning firebox, such as the Blackburn 54" (WB5412FB0F). Empire lists one outside air kit for its Blackburn 36", 44" and 54" fireboxes.
The kit connects with 4" flex duct, sold separately: choose the non-insulated duct (WBNID) or the insulated duct (WBID). Each is its own option here.
Features
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Outside air kit (WBOAK) for Blackburn wood fireboxes.
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Two duct choices: non-insulated (WBNID) or insulated (WBID).
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Left-side connection: the duct attaches to the left side of the fireplace.
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Chimney air kit: the 12" chimney air kit (WB12VCAK) needs this kit and a flex duct.
Fits These Wood Fireboxes
Works With
Specifications
| Model numbers |
WBOAK, WBNID, WBID |
| Parts |
Outside air kit (WBOAK); non-insulated duct for the kit (WBNID); insulated duct for the kit (WBID) |
| Duct size |
4" diameter flex |
| Maximum run |
20 ft with 4" duct; up to 40 ft with 6" duct and an adapter |
| Fits |
Blackburn wood burning fireboxes, including the Blackburn 54" (WB5412FB0F) |
Installation Notes
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Duct standard: the duct must meet UL 181 for factory-made air ducts.
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Frost: insulate the pipe to prevent frost condensation, per the installation manual.
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Length: 4" duct runs up to 20 ft; with 6" duct and an adapter, up to 40 ft.
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Termination: place the hoods where snow or leaves cannot block the inlets, and seal each hood to the house with silicone.
Downloads
Warranty
The Blackburn 54 installation manual gives accessories and parts, including the outside air kit, a limited 1-year parts warranty against defects in workmanship or material, for the original purchaser. Travel, diagnostic, freight, removal and reinstallation costs are not covered. Full terms are in the warranty section of the installation manual.
