Our Certifications at Oak Grove Heating & Air Conditioning Our team at Oak Grove Heating & Air Conditioning in Hattiesburg works hard to have the most comprehensive heating and cooling service around. The primary 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 technicians 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 offer superior installation and maintenance on your heating and cooling systems. These technicians have demonstrated 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 Dave Lennox Premier Dealer™ Dave Lennox Premier Dealers™ are specially trained and independently evaluated continuously to offer a higher level of customer service. As a Dave Lennox Premier Dealer™, our team in Hattiesburg has partnered with Lennox®, a top name in home comfort, to carry some of the most innovative and energy efficient heating and cooling products in the industry. To keep “Premier” status, Oak Grove Heating & Air Conditioning participates in an independent Customer Review program that encourages our clients to honestly rate our performance so we can make sure our staff continuously is meeting or exceeding the highest standards for quality service. SunSource® Solar-Ready Dealer Designation As a Lennox SunSource Solar-Ready Dealer, Oak Grove Heating & Air Conditioning has received Lamar County certification requirements for residential solar installations. We’ve gone through training, and we’re knowledgeable not only about the solar-ready Lennox® products we offer in Lamar County, but also your community’s utility requirements, rebates and incentives. We can help make your SunSource Home Energy System installation process quick and easy. Better Business Bureau Oak Grove Heating & Air Conditioning is a member of the Better Business Bureau. That means we operate by ethical business behaviors and give trustworthy information to our customers. We have a good rating and are proud to be part of this organization.