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Carbon monoxide detectors and signage for Massachusetts side-wall venting

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What is going on

Side-wall horizontal venting where the exhaust terminal is under 7 ft above grade needs CO detectors and signage.

Check in this order

  1. Confirm a hard-wired CO detector with alarm and battery backup is installed on the floor level where the appliance is installed.
  2. Confirm a battery or hard-wired CO detector with alarm is installed on each additional level served.
  3. If the appliance is in a crawl space or attic, the detector may go on the next adjacent floor level.
  4. If the detectors cannot be completed at install, allow 30 days for the owner to comply, with a battery-operated CO detector installed in the meantime.
  5. Install a metal or plastic sign at least 8 ft above grade directly in line with the exhaust terminal, with lettering at least 1/2 in high that reads: GAS VENT DIRECTLY BELOW, KEEP CLEAR OF ALL OBSTRUCTIONS.
  6. Leave the venting kit installation instructions with the appliance when BAYAIR30AVENTA or BAYVENT200B is used.

Applies to: Side-wall horizontal venting in Massachusetts

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Source: Trane installer's guide, p. 25-29. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.