23 00 00 "Heating, Ventilating, and Air-Conditioning (HVAC)"

23 20 00 HVAC Piping and Pumps

23 21 00 Hydronic Piping and Pumps 23 22 00 Steam and Condensate Piping and Pumps 23 23 00 Refrigerant Piping 23 24 00 Internal-Combustion Engine Piping 23 25 00 HVAC Water Treatment

0 Manufacturers