22 33 00 Electric Domestic Water Heaters
22 33 36.16 Commercial Storage Electric Domestic Water Heaters
22 33 13Instantaneous Electric Domestic Water Heaters22 33 13.13Flow-Control, Instantaneous Electric Domestic Water Heaters22 33 13.16Thermostat-Control, Instantaneous Electric Domestic Water Heaters22 33 30Residential, Electric Domestic Water Heaters22 33 30.13Residential, Small-Capacity Electric Domestic Water Heaters22 33 30.16Residential, Storage Electric Domestic Water Heaters22 33 30.23Residential, Collector-to-Tank, Solar-Electric Domestic Water Heaters22 33 30.26Residential, Collector-to-Tank, Heat-Exchanger-Coil, Solar-Electric Domestic Water Heaters22 33 33Light-Commercial Electric Domestic Water Heaters22 33 36Commercial Domestic Water Electric Booster Heaters22 33 36.13Commercial Domestic Water Electric Booster Heaters22 33 36.16Commercial Storage Electric Domestic Water Heaters