volume water heaters (VWH), residential heat pump hybrid water heaters, residential gas and electric water heating, indirect and storage tank, tankless, solar water heating
CSI code / Product type
22 34 13 Instantaneous tankless gas domestic water heaters
22 33 30.26 Residential, collector-to-tank, heat-exchanger-coil, solar-electric domestic water heater
22 33 30 Residential electric domestic water heaters
22 34 30 Residential gas domestic water heaters
22 33 30.16 Residential storage electric domestic water heaters