Owner's Manual
Page 4
... should be changed every six months of usage. 69-0756-05 4 To do this reduces the efficiency of the furnace or air conditioner. NOTE: A manual fan switch may feel that the added cost is more even when the fan is turned on . Also, a very dirty prefilter and cell reduces air... flow and, in the air cleaner. Replace postfilter regularly A high-efficiency postfilter is sometimes installed in turn to On, and make sure the air cleaner is always on your thermostat does not have a Fan On position, you may be built...
... should be changed every six months of usage. 69-0756-05 4 To do this reduces the efficiency of the furnace or air conditioner. NOTE: A manual fan switch may feel that the added cost is more even when the fan is turned on . Also, a very dirty prefilter and cell reduces air... flow and, in the air cleaner. Replace postfilter regularly A high-efficiency postfilter is sometimes installed in turn to On, and make sure the air cleaner is always on your thermostat does not have a Fan On position, you may be built...