Since you really don"t see your ducts most of the time (they are hidden behind drywall, floors, and seldom used rooms) it"s often a struggle to understand why they may need regular cleaning. However, the ducts in a home circulate air through them regularly that comes through the return vents; the air that enters the return vents contains debris, skin flakes, pet dander, and other contamination. Over the span of a year, this debris will begin to build up along the inside of the ducting, and after three years this contamination level is often enough to begin to create problems for your home, the quality of your air, and the furnace.
To fight the problems of dirty ductwork, you should schedule regular duct maintenance. Every 3– 5 years is recommended, although some homes may need it more regularly. The job requires professionals with power vacuums and agitation equipment; it isn"t something you can handle yourself using a commercial long-hose vacuum and a mop
To protect your indoor air quality: Indoor air quality has been on the decline since home design created more effective insulation. Duct cleaning removes a major source for air contaminants from inside a home, helping to keep it a healthier and more enjoyable place.
To lower your heating and cooling bills: Even the thin layer of dust that can start to accumulate in ducts after only a year is good enough to create friction against the airflow from an ac system or forced-air heater. The harder an AC or heater has to work to overpower friction, the more power it will use, and you will see this reflected on your bills. Heavy congestion in the ducts can mean a comfort system that costs a 33% more to run. Keeping the “lungs" of your HVAC system clean will keep costs down.
To keep your property clean: Here"s a startling fact: a six-room home on average circulates 18 kilos. of dust through its ventilation system every four seasons. Try to think of that much dust spread over your home furniture! If your home is filled with dust no matter how much effort you put in to keep it clean, a clogged ductwork system is undoubtedly contributing to the trouble. Cleaner ductworks mean a cleaner house.