AQUAH PARAMOUNT DIRECT VENT NATURAL GAS TANKLESS WATER HEATER $409.95 AQUAH 12L (3.2 GPM) Natural Gas Tankless Water Heater $219.99 AQUAH PLUS DIRECT VENT NATURAL GAS TANKLESS GAS WATER HEATER $299.95 AQUAH 10L (2.65 GPM) Natural Gas Tankless Water Heater $399.90 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 PREMIUM DIRECT VENT NATURAL GAS TANKLESS WATER HEATER $389.95 Output Temperature Sensor (10L) $9.95 Gas Inlet (10L) $14.50 On/Off Switch (6L) $8.95 Diaphragm (16L, Silicon Gel) $15.95