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