22.34.00 Fuel-Fired Domestic Water Heaters
22.34.13 Instantaneous, Tankless, Gas Domestic Water Heaters
22.34.13 Instantaneous, Tankless, Gas Domestic Water Heaters 22.34.30 Residential Gas Domestic Water Heaters 22.34.30.13 Residential, Atmospheric, Gas Domestic Water Heaters 22.34.30.16 Residential, Direct-Vent, Gas Domestic Water Heaters 22.34.30.19 Residential, Power-Vent, Gas Domestic Water Heaters 22.34.36 Commercial Gas Domestic Water Heaters 22.34.36.13 Commercial, Atmospheric, Gas Domestic Water Heaters 22.34.36.16 Commercial, Power-Burner, Gas Domestic Water Heaters 22.34.36.19 Commercial, Power-Vent, Gas Domestic Water Heaters 22.34.36.23 Commercial, High-Efficiency, Gas Domestic Water Heaters 22.34.36.26 Commercial, Coil-Type, Finned-Tube, Gas Domestic Water Heaters 22.34.36.29 Commercial, Grid-Type, Finned-Tube, Gas Domestic Water Heaters 22.34.46 Oil-Fired Domestic Water Heaters 22.34.46.13 Large-Capacity, Oil-Fired Domestic Water Heaters 22.34.56 Dual-Fuel-Fired Domestic Water Heaters