Profile: Complete Heating and Air Conditioning Ltd. is specialized in supplying Lennox & Carrier heatpumps, high-efficiency furnaces, and air conditioning systems. We also carry many other heat pump, furnace, and air conditioner brands, such as York, Amana, Coleman, Intertherm, Tempstar, Aire-Flo, Payne and Heil. Flammable Vapour Ignition Resistant (FVIR) Superfluer safety system is a cutting-edge design unique to GSW power vented residential gas water heaters. The Superfluer safety system features a flammable vapor sensor that protects the consumer by detecting the presence of flammable vapors in the atmosphere around the water heater, and disabling the unit to minimize the risk of ignition. It also features a robust air intake snorkel that inhibits flammable vapors from entering the combustion chamber, and igniting.