by Mark Hansberger on March 6, 2012March 6, 2012 How The NATE And BPI Seals Help To Ensure That Your Job Will Be Done Right When you need the services of a heating, ventilation and air conditioning contractor (HVAC), strongly consider using a company that has NATE and BPI certification to get the best of the best in the field. […]Read More Filed Under: NATE Certification– Technicians Tagged With: Arizona– BPI– hvac technician– liscensing– NATE– Yuma