Why does duct work need cleaning?

Dust made up of dirt, pollen fibers, mold spores, hair and more get drawn into your HVAC system. About 95% of these particles will pass through your filter and back into the room, or it accumulates on the fan blades of the blower motor, the grills or inside your duct work, this buildup can reduce the air flow up to as much as 40%. These are things that can cause allergic reactions in allergy sufferers, and are a source of musty odors.

Dirty Ducts

When should they be cleaned?

When anyone in the house has breathing problems such as asthma, allergies, or emphysema, before moving into a new home, when installing a new furnace and after renovation work has been completed. When dust appears on walls, floors, ceiling fixtures, carpets or drapes and around registers.

How often should they be cleaned?

In most homes duct work should be cleaned every three to five years.

How are the ducts cleaned?

Duct Cleaning Truck
A truck mounted vacuum system especially designed for duct work cleaning is used. The duct work is air swept with 200 lbs of applied pressure while the vacuum hose pulls 12,000 cubic feet per minute back out of the duct work. Everything is pulled back towards the furnace so there will be no mess to clean up afterwards. Everything is drawn into the truck and contained inside a sealed compartment on the truck. The return registers can be hand cleaned with disinfectant. The return, supply plenums, and evaporator coil can also be cleaned if accessible. Disinfectant can be applied to the internal duct system.

What are the benefits of duct cleaning?