23 70 00 Central HVAC equipment
23 54 16.16 Oil fired furnace
23 81 26 Split-system air-conditioners
23 81 46 Water source unitary heat pumps
23 54 13 Electric-resistance furnaces
23 72 00 Air to air energy recovery equipment
23 74 00 Packaged outdoor HVAC equipment
23 81 43 Air-source unitary heat pumps
23 81 13 Packaged terminal air-conditioners
23 54 16.13 Gas fired furnace
23 73 00 Indoor central-station air-handling unit