Our Certifications at Clean Air HVAC Our team at Clean Air HVAC in Pacheco works hard to have the best heating and cooling service around. One way we maintain our expertise and continue to expand our knowledge of HVAC products is by earning industry certifications. Find out more about the certifications our experts have received below. North American Technician Excellence (NATE) NATE is North America’s largest non-profit heating, ventilation, air conditioning and refrigeration certification organization. NATE certified technicians provide excellent installation and maintenance on your heating and cooling systems. These technicians have verified their knowledge in the HVAC specialty areas including: Air conditioning Air distribution Heat pumps Gas heating Oil heating Hydronics gas Hydronics oil Ground source heat pump loop installer Senior HVAC Efficiency Analyst Better Business Bureau Clean Air HVAC is a member of the Better Business Bureau. That means we operate by ethical business behaviors and provide trustworthy information to our customers. We have a strong rating and are proud to be part of this organization.