American Hometec AHG-T42 NG - GAS H2O Saver Technology AHG-T42 NG Natural Gas Tankless Water Heater with 4.2 GPM at 45F for Household of 1-3 Energy Star Qualified, Silver Delivers Max hot water generation of 4.2 GPM at 45F raise or ~3GPM at 65F raise water on demand Unique Hot Water Saver Technology has push button feature that allows pre-set, limited delivery of hot water Includes: heater, owner/installer manual, mounting bracket, pressure relief valve, inlet water filter, template and mount screws Install at point of use, Green technology saves up to 50-percent energy and supplies instant hot water in 2 seconds flat Qualifies for LEED points, meets NAHB green building standards, Green Plumbers USA preferred methods