I have two Lennox units for a medical office and one of them has had a problem since it was installed. The units are just 5 years old and one unit has had the compressor replaced and switches replaced every year. Now on both units the fan blades have broken off and need to be replaced. Stay away from Lennox. They stink. The units might have been good at one time but they maybe will last one year before all the part go bad one at a time.