Allied Furnace: Return air must not come from a room with a gas appliance
Return air must not come from a room with a gas appliance on a Allied furnace: Pulling return air from a room with a gas water heater, gas appliance or wood fireplace creates negative pressure. Flue gases can then be drawn back down the vent and produce carbon monoxide that is spread through the duct system.
Applies to: Return air plenum installations
How to fix return air must not come from a room with a gas appliance: step by step
- Do not draw return air from a room that contains another gas appliance or combustion device.
- Seal the plenum to the furnace cabinet with fiberglass strips, caulk or equivalent when using bottom or side return.
If the unit shows an error code, look it up: Allied Furnace codes
Models
92G1UH92G1UH0450892G1UH0451292G1UH0700892G1UH0701292G1UH0901292G1UH0901692G1UH1101692G1UH1102092G1UH1352095G1UHA93UHA95UH
Source: Allied 92G1UH installation manual, p. 17 (PDF p. 17). Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.