THE WATER HEATER(S) SHALL BE RHEEMGLAS OUTDOOR GAS MODEL No. A311170 WITH AN HOURLY GAS INPUT OF 40 MJ (NATURAL) AND A HOURLY RECOVERY RATE OF 175 LITRES (NATURAL) THROUGH A 45°C RISE. THE WATER HEATER(S) SHALL BE APPROVED TO THE NEW ZEALAND STANDARD NZS5262 THE WATER HEATER SHALL BE FACTORY ASSEMBLED AND TESTED. GAS CONTROLS SHALL INCORPORATE OVER TEMPERATURE ENERGY CUT OFF SWITCH AND A 100% SAFETY SHUT DOWN FAILURE CONTROL IN THE EVENT OF THE THERMOSTAT BECOMING INOPERATIVE.