Our Certifications at Kowalski Heating, Cooling & Plumbing Our team at Kowalski Heating, Cooling & Plumbing in McMurray strives to have the most comprehensive heating and cooling service around. One way we sustain 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. 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 McMurray 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, Kowalski Heating, Cooling & Plumbing 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.