Whether you're looking to purchase an Ultra Series Water Heater or a Luxury or Value Series, we have it all here at Cosmopolitan Heating Services Hamilton.In order to satisfy residential requirements of hot water, Rinnai manufactures units that are Energy Star qualified, are light in weight & small in size, support both natural gas & propane as fuel and offer over 9 GPM supply of hot water. In case you're tired of conventional Water Heaters and want a solution that is light in weight and small in size, rush! Purchase a Rinnai Water Heater.