Las Vegas, Nevada (NAPSI) - Be warned: Dirt, allergens and pollutants may be lurking in the cleanest home, hidden away where you can’t see them, but you can get help getting rid of them.


The mold, fungi, bacteria and dust clogging your home’s heating, ventilation and air-conditioning (HVAC) system can affect your family’s health.


Frequency of cleaning depends on whether there are pets or smokers in the house, there’s been water damage or remodeling done or anyone has allergies or asthma.


The most effective way to clean air ducts and ventilation systems is to have a professional contractor place the system under negative pressure, through the use of a specialized, powerful vacuum.


Ask if the contractor you’re considering is a member of the National Air Duct Cleaners Association (NADCA). These have a Code of Ethics and follow NADCA Standard.


Find a nearby association member at