Our Certifications at PWA Heating & Cooling Inc Our team at PWA Heating & Cooling Inc in Plainfield aims to have the most comprehensive heating and cooling service around. One of the ways we maintain our expertise and continue to expand our knowledge of HVAC products is by earning industry certifications. Discover more about the certifications our technicians have received below. 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 Plainfield 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, PWA Heating & Cooling Inc 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.