Product description(s)
residential and commercial: make-up air heaters, radiant heaters, electric boilers, air to water heat pump systems; residential only: plenum heaters, heat pump comfort systems, duct heaters, HRV/ERV heat exchanger (aftermarket parts only), generator transfer switches; commercial only: forced air heating equipment, demand monitor and control equipment
CSI code / Product type
23 52 00 Heating boilers
23 70 00 Central HVAC equipment
23 82 41 Water to water heat pumps
23 81 43 Air-source unitary heat pumps
23 83 00 Radiant heating units
23 73 00 Indoor central-station air-handling unit
