Sentinel Capital Partners Sells NSI Industries' HVAC Division to Lennox for $550 Million

Rhea-AI Summary

Sentinel Capital Partners announced on October 16, 2025 the sale of NSI Industries' HVAC division (including Duro Dyne and Supco) to Lennox (NYSE: LII) for approximately $550 million in cash. The divestiture returns NSI to a pure-play branded electrical products manufacturer focused on connectors, fittings, and replacement-driven components sold under names like Bridgeport, Polaris, and Tork. Sentinel said the move aligns NSI with its core electrical distribution customers, while Lennox acquires market-leading HVAC parts and supplies to expand its lifecycle offerings.

Positive

• $550 million cash purchase price for NSI HVAC division
• Lennox gains market-leading Duro Dyne and Supco HVAC brands

Negative

• NSI exits HVAC, reducing business diversification into climate-control products

Insights

Strategic Transactions Analyst

Sale for $550 million shifts NSI to a focused electrical-products strategy while Lennox adds HVAC parts brands.

Sentinel Capital Partners sold NSI's HVAC division, including the Duro Dyne and Supco brands, to Lennox for $550 million on October 16, 2025, and NSI will refocus as a pure-play maker of branded electrical components such as Bridgeport, Polaris, and Tork. The transaction converts a business unit into cash and narrows NSI's product scope to insulated connectors, fittings, and replacement-driven components that the content describes as core offerings.

The outcome depends on successful use of proceeds and management execution: retaining distributor relationships and maintaining steady replacement-driven demand matter for NSI; integrating Duro Dyne and Supco into Lennox's parts and services offering matters for Lennox. Key operational risks include integration of people and systems, and preserving brand value during the ownership transition. Neither regulatory, financing, nor specific cost synergies are disclosed, so those remain unknown.

Monitor the announced integration milestones and any statements about how the $550 million proceeds will be deployed by Sentinel or NSI, plus near-term updates on distributor continuity and product availability within 6–12 months. These items will clarify whether the divestiture strengthens NSI's electrical focus and whether Lennox captures the expected strategic fit.

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.

"There is an excellent strategic fit between NSI's HVAC division and Lennox," said John Van Sickle, a Sentinel partner. "This sale returns NSI to its roots as an electrical products company serving distributors nationwide. Our partnership with NSI's talented management team builds on the company's strong record of success, great brands, and reputation for superior service to electrical customers."

"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," said NSI's HVAC President, John MacQuarrie. "We remain focused on operational excellence, product innovation, and delivering exceptional value to our customers."

Sentinel's expertise in electrical manufacturing and distribution includes prior investments in ECM Industries (electrical products for construction, maintenance, lighting, irrigation, landscape supply, and gas utility markets) and Power Products (diversified electrical products). Sentinel's broader industrial manufacturing and distribution expertise includes investments in Chromalox (commercial and industrial electric heating products and systems), Engineered Controls (specialized pressure regulators, valves, and other controls), LTI Boyd (engineered sealing and thermal management components), RotoMetrics (rotary tooling products), Sonny's (conveyorized car wash systems and related products), and Spectrum Safety Solutions (fire detection and suppression products).

About Sentinel Capital Partners

Sentinel is a leading midmarket private equity firm. Working collaboratively with portfolio companies, Sentinel offers operational resources and strategic advice that help its management teams solve challenges, capitalize on opportunities, and build stronger, more valuable businesses. Sentinel also provides junior capital solutions as a minority investor.

Sentinel focuses on niche markets across the business services, consumer, healthcare services, and industrial sectors. Since its inception in 1995, Sentinel has raised more than $11.2 billion of capital. To learn more, please visit sentinelpartners.com.

About NSI Industries

Headquartered in Huntersville, North Carolina, NSI is a leading manufacturer and supplier of branded electrical components to third-party distributors in the United States and Canada. NSI's portfolio includes well-respected brands such as Bridgeport, Polaris, and Tork, and the company offers more than 10,000 products throughout North America. For more information, visit www.nsiindustries.com.

About Lennox

Lennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. It is committed to sustainability and creating comfortable, healthier environments for residential and commercial customers. Its innovative portfolio includes cooling, heating, indoor air quality, and refrigeration systems, along with a comprehensive range of HVAC parts, supplies, and services that support the full lifecycle of customer needs. Additional information is available at www.lennox.com. For media inquiries, contact PR@lennox.com.

Contact: Roland Tomforde
Broadgate Consultants
212-232-2222

View original content:https://www.prnewswire.com/news-releases/sentinel-capital-partners-sells-nsi-industries-hvac-division-to-lennox-for-550-million-302586436.html

SOURCE Sentinel Capital Partners

FAQ

What did Sentinel announce about NSI Industries on October 16, 2025?

Sentinel announced the sale of NSI's HVAC division to Lennox for approximately $550 million in cash.

Which NSI brands did Lennox acquire in the transaction that mentions LII?

Lennox acquired NSI's HVAC brands including Duro Dyne and Supco.

How will the NSI sale affect NSI's business focus after October 16, 2025?

NSI will refocus as a pure-play manufacturer of branded electrical products under names like Bridgeport, Polaris, and Tork.

What is the immediate financial consideration for Lennox (NYSE: LII) in this deal?

Lennox is paying approximately $550 million in cash to acquire NSI's HVAC division.

Does the announcement state why the sale was made between Sentinel, NSI, and Lennox?

The announcement says the sale is a strategic fit that returns NSI to electrical products and expands Lennox's HVAC parts and lifecycle offerings.