Lennox International acquired the HVAC division of NSI Industries, a portfolio company of private equity firm Sentinel Capital Partners, for $550 million in an all-cash deal. The transaction closed on October 16, 2025.

Acquirer: Lennox International
Target: NSI Industries' HVAC Division
Type of deal: Acquisition
Closing date: October 16, 2025
Deal value: $550 million

The acquisition allows Lennox International to bolster its presence in the HVAC market, complementing its existing product offerings and expanding its customer base. For NSI Industries, divesting the HVAC division returns it to a pure-play manufacturer of branded electrical products.

Lennox International is a leading global provider of climate control solutions with operations spanning residential, commercial, and industrial markets. The company aims to leverage the acquired HVAC division's complementary product lines and customer relationships to enhance its market position in North America.

The deal was announced on October 16, 2025, but details regarding buy-side or sell-side financial advisors and legal counsel have not been disclosed. NSI Industries is owned by private equity firm Sentinel Capital Partners.