On line heaters with in built coil, Thermostat for temperature control, Conductor, Flow sensor etc. Outdoor Heat Pump Components Compressor : Scroll (low noise) , Evaporator Coils : tubes made of Copper & fins in aluminum , Fan : Axial , Condenser : Double spiral titanium tubes with PVC encased , Thermostat : Electronic thermostat with digital display of temp & other functions, Casing : Zinc Plated steel with PVC powder coating which withstand outdoor weather condition.