by Mark Hansberger on March 30, 2017May 3, 2017 Does My HVAC Contractor Need to Be NATE Certified? In Arizona, HVAC contractors must have current licenses, insurance and bonding, but they’re not required to be NATE certified. However, if you want the best service and performance from your HVAC contractor, it’s a good […]Read More Filed Under: HVAC Contractor Tagged With: HVAC– hvac contractor– NATE– NATE certifications