Therm 2.7 kW Low Flow Heater Assembly [240V] (C3403 1) plugs The Products Unlimited contactor is The Products Unlimited contactor is designed for compatible electrical systems that require a double pole switching component rated for 220 volt operation and 50 amp capacity Helps provide pneumatic activation in compatible control systems 7 kW low flow heater assembly is designed for compatible 230 volt applications where the system operates with a lower flow heating arrangement Low flow heater assemblies are useful because they are matched to systems that need dependable heating without the higher flow requirements of larger mainstream heater designs