22 34 00 Fuel-Fired Domestic Water Heaters
22 34 13 Instantaneous, Tankless, 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