22 34 00 Fuel-Fired Domestic Water Heaters
22 34 36.23 Commercial, High-Efficiency, Gas Domestic Water Heaters
22 34 13Instantaneous, Tankless, Gas Domestic Water Heaters22 34 30Residential Gas Domestic Water Heaters22 34 30.13Residential, Atmospheric, Gas Domestic Water Heaters22 34 30.16Residential, Direct-Vent, Gas Domestic Water Heaters22 34 30.19Residential, Power-Vent, Gas Domestic Water Heaters22 34 36Commercial Gas Domestic Water Heaters22 34 36.13Commercial, Atmospheric, Gas Domestic Water Heaters22 34 36.16Commercial, Power-Burner, Gas Domestic Water Heaters22 34 36.19Commercial, Power-Vent, Gas Domestic Water Heaters22 34 36.23Commercial, High-Efficiency, Gas Domestic Water Heaters22 34 36.26Commercial, Coil-Type, Finned-Tube, Gas Domestic Water Heaters22 34 36.29Commercial, Grid-Type, Finned-Tube, Gas Domestic Water Heaters22 34 46Oil-Fired Domestic Water Heaters22 34 46.13Large-Capacity, Oil-Fired Domestic Water Heaters22 34 56Dual-Fuel-Fired Domestic Water Heaters