Hearth and Home Technologies BIR50-B owner manual Install Outside Air Kit, Yes

Heatilator • Birmingham BIR50-B • 4059-682C • 8/12

3 ft min. from top of uppermost chimney section to air inlet.

Outside air installed on both sides (right side not shown)

Figure 7.3 Outside Air Inlet Locations

NO	NO
	Garage or	NO
Outlet blocked by	combustible
snow, leaves, etc.	liquids storage	Attic space
		NO
		Outlet placed
		higher than 3 ft
		below the
		termination cap
YES	Factory-built
Clear area
	fireplace
outside
house or in
ventilated	Use only duct materials specified by manufacturer (preferably
crawl space
	with short run or mainly straight duct, except small dip for cold
	air trap which will help prevent flow of cold air).

Figure 7.4 Outside Combustion Air Placement

E. Install Outside Air Kit

•Keep duct runs short and straight to minimize restriction.

•The outside air kits must be installed on both sides of the fireplace.

Warning! Outside air kits must be installed on both sides of the fireplace to prevent overheating and fire.

•Install as shown in Figures 7.3, 7.4 and 7.5.

•The air ducts may be run vertically.

•The outside air hoods must be at least 3 ft (.91 m) below the top of the uppermost chimney section.

Caution! Risk of Fire or Asphyxiation! Do not draw outside combustion air from wall, floor or ceiling cavity, or enclosed spaces such as an attic or garage.

•Do not place outside air hoods close to exhaust vents or chimneys. Fumes or odor could be drawn into the room through the fireplace.

•Locate outside air hoods to prevent blockage from leaves, snow/ice, or other debris. Blockages could cause the unit to overheat.

Notice: The fireplace provides some outside air for combustion. Other methods may be necessary if more air is required.

22

Flexible Duct (not supplied)

Outside Air
Hood	2 Wire Ties

Figure 7.5 Outside Air Installation