Our Certifications Our team at Twin Air LLC in Manassas works hard to provide the finest heating and cooling service around. One way we keep our expertise and continue to build knowledge about HVAC products is by earning industry certifications. Find out more about the certifications our professionals 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 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 Dave Lennox Premier Dealer™ Dave Lennox Premier Dealers™ are specially trained and independently evaluated regularly to offer a higher level of customer service. As a Dave Lennox Premier Dealer™, our team in Manassas has partnered with Lennox®, a top name in home comfort, to provide some of the most innovative and energy efficient heating and cooling products in the industry. To keep “Premier” status, Twin Air LLC takes part 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, Twin Air LLC has achieved Manassas 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 Manassas, but also local utility requirements, rebates and incentives. We can help make your SunSource Home Energy System installation process quick and easy.