(NAPSI)—Keeping your home’s heating, ventilation and air-conditioning (HVAC) system clean and well maintained can help you breathe better air and save energy and money.

Here’s a list of things to look for when you hire an HVAC cleaning company to ensure quality work.

 Can the company show proof of NADCA membership and certification? NADCA members must adhere to a strict code of ethics.

 Will the contractor conduct a thorough inspection of the HVAC system before doing any work?

 Will the contractor clean the supply ductwork and return air ductwork?

 Will the company remove, clean and reset supply registers and return air grilles? Are the plenums free of moisture, stains, dust, debris and other contaminants?

 Are access panels properly sealed according to ACR, the NADCA Standard?

 Will the contractor clean the airstream side of the heat exchanger plus the secondary heat exchanger?

 Will the company remove, clean and reinstall the blower motor, housing and assembly?

 Will the contractor clean the evaporator coil, drain and pan?

 Will the contractor replace the air filter so it fits properly and meets the efficiency recommended by the manufacturer?

For a full checklist and additional tips, go to http://nadca.com/en/evaluation-checklist.