Research by the U.S. EPA shows that buildup of .042 inches of dirt on a heating or cooling coil can result in a decrease in efficiency by 21%. Clean systems restore capacity and lessen running time.
9 out of 10 A/C system failures are caused by dirt and dust.
Dust is made up of dirt, pollen, fibers, mold spores, hair and other allergy causing particles. About 95% of these particles will pass through your filter and back into your home.
The dust that stays in your system will accumulate on the fan blades of the blower motor, the grills, or the inside of your ductwork. This build up in your air ducts can reduce the flow of air up to 40%.
Now acknowledged as a major allergy and disease-causing problem by leading medical authorities, poor indoor air quality has prompted doctors and allergists to commonly prescribe furnace and air duct cleaning as one of the ways to reduce allergy problems.
The EPA states that indoor air is up to 70 times more polluted than outdoor air, now consider that according to the American Lung Association most people spend 90% of their time indoors.