Our Certifications at Toptec Heating, Cooling, Plumbing & Electrical Our team at Toptec Heating, Cooling, Plumbing & Electrical in Libertyville aims to offer the most comprehensive heating and cooling service around. One of the ways we sustain our expertise and continue to build knowledge about HVAC products is by earning industry certifications. Learn 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 offer outstanding 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 Libertyville 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, Toptec Heating, Cooling, Plumbing & Electrical 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. Better Business Bureau Toptec Heating, Cooling, Plumbing & Electrical is a member of the Better Business Bureau. That means we abide by ethical business behaviors and share trustworthy information with our customers. We have a good rating and are proud to be part of this organization.