AQUAH PLUS DIRECT VENT LIQUID PROPANE GAS TANKLESS WATER HEATER 10L / 2.7 GPM Brand New AQUAH Plus direct vent liquid propane gas tankless water heater 2.7 GPM with 45 temperature rise, Thermal Output: 20,000 Watt /68,242 Btu/h; Compact, highly efficient and ideal for indoor use with thermal efficiency of &gt;=88%. Constant water temperature regulated by thermistor regardless of fluctuations of water/gas flow. Runs automatically with no need for user intervention.