The biggest mistake we ever made was allowing this company to install our furnaces. Their furnace installation did not pass our city's code, air duct leakage, wrong size, chimney not lined (1990 CODE), not installed according to Payne's manual. Manufacturer's warning says "never connect return-air ducts to the back of the furnace. Failure to follow this warning could result in personal injury, death and/or property damage." We are now having the new furnaces ripped out after less than one year at our expense. 5 reputable companies won't put in an air conditioner until these furnaces are removed. Phone call not returned.