Phoenix, Arizona (NAPSI) - When it’s time to have your home’s heating and cooling ducts cleaned, it’s important to do your homework and avoid scam artists.

So say the experts at the nonprofit National Air Duct Cleaners Association (NADCA). They recently exposed some companies that use bait-and-switch tactics to take advantage of consumers.

Said Executive Director Jodi Araujo, “Consumers should always be on the lookout for duct-cleaning companies whose advertised prices seem too good to be true. Beyond the pricing issues, incomplete and unprofessional work on air duct systems could damage the integrity of consumers’ HVAC system. Be sure to work with a qualified, NADCA-certified HVAC professional.” She offers the following advice:

• Make sure the ductwork, coils and all components are cleaned in accordance with NADCA standards.

• Be sure this is all documented on the bill of sale.

•For more information and to find a certified NADCA member, visit