Sentinel Capital Partners Sells NSI Industries' HVAC Division To Lennox International For ~$550M In Cash

Lennox International Inc. -2.19%

Lennox International Inc.

LII

454.64

-2.19%

Divestiture Returns NSI to Pure-Play Electrical Products Business

NEW YORK, Oct. 16, 2025 /PRNewswire/ -- Sentinel Capital Partners, a private equity firm that invests in promising midmarket companies, today announced the sale of NSI Industries' HVAC division—which includes the market-leading Duro Dyne and Supco brands—to Lennox International for approximately $550 million in cash.

With this divestiture, NSI will refocus as a pure-play manufacturer of branded electrical products sold under iconic names like Bridgeport, Polaris, and Tork. Insulated connectors, fittings, and other high-value-add components with steady, replacement-driven demand will remain the core of NSI's offering.

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