Sentinel capital partners sells nsi industries' hvac division to lennox for $550 million

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.
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