Lennox International (NYSE: LII) announced today, October 16, 2025, that it has completed the purchase of NSI Industries’ HVAC division for approximately $550 million in cash. The transaction includes the Duro Dyne and Supco brand platforms, adding a robust portfolio of HVAC parts and supplies to Lennox’s existing product lines.
The acquisition expands Lennox’s ability to serve residential and commercial customers throughout the HVAC value chain, providing a broader range of parts and supplies that complement its core heating, ventilation, and air‑conditioning systems. By integrating respected brands like Duro Dyne and Supco, Lennox strengthens its distribution network and enhances its market position in the North American HVAC market.
This transaction reflects Lennox’s disciplined approach to strategic investment and long-term growth, aligning with its self‑help transformation plan to accelerate profitability and market leadership. The addition of Duro Dyne and Supco’s established brand presence is expected to support Lennox’s continued expansion of its parts and supplies offerings and reinforce its competitive moat in the industry.
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