I performed a heating maintenance on two gas furnaces and one heat pump air handler I replaced two 20x25x5 and one 16x20x5 and one 14x17.5x2 homeowner supplied filters I checked all electrical components one the heat pump air handler and checked the temp rise and checked the Freon levels and checked the capacitor and on the gas furnaces I checked all electrical components and checked the temp rises and checked and cleaned the flame sensors and checked the heat exchangers on both units and checked the gas pressures everything is in good working order at this time.