Outlet Temperature Sensor (AQE18) $12.50 AQUAH 12L (3.2 GPM) Natural Gas Tankless Water Heater $219.99 AQUAH 10L (2.65 GPM) Natural Gas Tankless Water Heater $199.95 AQUAH PREMIUM DIRECT VENT NATURAL GAS TANKLESS WATER HEATER $389.95 AQUAH PLUS DIRECT VENT NATURAL GAS TANKLESS GAS WATER HEATER $299.95 AQUAH 12L (3.2 GPM) Outdoor Natural Gas Tankless Water Heater $229.00 AQUAH 16L (4.23 GPM) Natural Gas Tankless Water Heater $299.95 AQUAH 10L (2.65 GPM) Outdoor Natural Gas Tankless Water Heater $209.99 AQUAH 24 KW Electric Tankless Water Heater $279.75 AQUAH PARAMOUNT DIRECT VENT NATURAL GAS TANKLESS WATER HEATER $409.95 AQUAH 27 KW Electric Tankless Water Heater $299.95