Homeowners can find a heating and cooling duct cleaning service by searching for local companies that offer that specific service, such as HVAC companies. It's better to select a company that offers full service duct cleaning, has good references and is fully certified by the National Air Duct Cleaners Association.
It's best that a homeowner have his ducts cleaned if his home has recently been renovated, if pests have infiltrated the ducts, if there are signs of mildew or mold, and if there are contaminants blowing out of the ducts. A duct cleaning may also be necessary if someone in the home is suffering from a sudden and unexplained illness that may be related to allergies.
There is some debate as to if duct cleaning is necessary, but it can potentially improve a home's interior air quality, prevent dryer fires and help the HVAC system operate more efficiently. Any dust, dirt and allergens that exist in a home's ducts can lead to a build up of fungi, bacteria and mold.
Homeowners should collect several estimates from different duct cleaning companies to find one that offers the best service at the best price. Cleanings done with any kind of moisture, sealants or sprays should be avoided, since they may do more harm than good.