Lennox (USA) has completed the acquisition of the HVAC division of NSI Industries, including the Duro Dyne and Supco brands, for approximately $550 million in cash. The move expands Lennox’s portfolio of HVAC parts and supplies for both residential and commercial markets.
According to Lennox, the integration of Duro Dyne and Supco strengthens the company’s ability to serve customers across the full HVAC value chain—from equipment and installation to service and preventive maintenance. Both brands offer a wide range of HVAC components that complement Lennox’s existing offerings.
“This acquisition enhances our ability to support residential and commercial customers throughout the entire HVAC value chain,” said Alok Maskara, Chief Executive Officer of Lennox. He also noted the strategic importance of expanding Lennox’s distribution capabilities and product lineup.
John Van Sickle, Partner at Sentinel Capital Partners—the private equity firm that owned NSI—highlighted the strategic alignment between NSI’s HVAC division and Lennox. “This sale returns NSI to its roots as an electrical products company serving distributors nationwide,” he said.
Following the sale, NSI will refocus on its core business as a manufacturer of branded electrical products sold under names such as Bridgeport, Polaris, and Tork. The company will continue to offer insulated connectors, fittings, and other replacement-driven components.
“We’ve been proud to call NSI home for the past four years and look forward to joining the Lennox team in our next chapter of growth,” added John MacQuarrie, President of NSI’s HVAC division. “We remain focused on operational excellence, product innovation, and delivering exceptional value to our customers.”
