duct cleaning is significant for the effective working of your unit. The process of duct cleaning clean the system from the inside which allow the machine to filter the air effectively. When your heating and cooling system has the duct cleaned it required less energy to work efficiently. Therefore, it enhances the life span of you machine and your room will get ventilated with fresh air . my duct cleaner suggest you to go for a professional duct cleaning services at least once in a year. It will increase the longevity of your machine as well.