Lennox International LII

NYSE LII

$375.83 -9.35 (-2.43%)

As of: Sep 9, 2026 · 3:59 PM EDT

Key Stats

Market Cap13.02 Bn

P/E16.51

P/S2.46

Div. Yield0.01

Total Debt (Qtr)1.58 Bn

Revenue Growth (1y) (Qtr)2.96

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About

Lennox International Inc. designs, manufactures and markets a broad range of energy-efficient climate-control solutions for heating, ventilation, air conditioning and refrigeration markets. The company generates revenue primarily from the sale of HVACR products such as furnaces, air conditioners, heat pumps, packaged systems, indoor air quality equipment, comfort controls, replacement parts, and related services, distributed through wholesale distributors, contractors,…

Lennox International Inc. designs, manufactures and markets a broad range of energy-efficient climate-control solutions for heating, ventilation, air conditioning and refrigeration markets.

The company generates revenue primarily from the sale of HVACR products such as furnaces, air conditioners, heat pumps, packaged systems, indoor air quality equipment, comfort controls, replacement parts, and related services, distributed through wholesale distributors, contractors, company-owned Lennox Stores, and direct sales, with 2025 net sales of $3,343.4 million from Home Comfort Solutions and $1,851.9 million from Building Climate Solutions, totaling $5,195.3 million.

The company operates through the following segments: Home Comfort Solutions and Building Climate Solutions.

Home Comfort Solutions: This segment provides furnaces, air conditioners, heat pumps, packaged heating and cooling systems, indoor air quality equipment, comfort control products, replacement parts and supplies for residential replacement and new construction markets, sold under brands including Lennox, Dave Lennox Signature Collection, Armstrong Air, AirEase, Ducane, Concord, MagicPak, ADP Advanced Distributor Products, Allied, Supco, LINEBACKER, Elite Series, Merit Series, iComfort, ComfortSense, Healthy Climate, Healthy Climate Solutions, and through Lennox Stores and independent installing dealers.
Building Climate Solutions: This segment provides unitary heating and air conditioning equipment, applied systems, controls, installation and service for commercial heating and cooling, variable refrigerant flow products, refrigeration equipment under Heatcraft Worldwide Refrigeration, National Account Services, and recent acquisitions of AES Industries and Duro Dyne and Supco, serving light commercial, refrigeration, and service markets across North America.

Lennox International Inc. holds a leading position as a global provider of energy-efficient climate-control solutions, competing with major players such as Carrier Global Corporation, Trane Technologies plc, Paloma Industries (Rheem, Ruud), Bosch Group (York, Luxaire, Coleman), Daikin Industries (Daikin, Goodman, Amana), and Madison Industries (Maytag, Westinghouse), while differentiating itself through innovation, product quality, reliability, a broad portfolio of brands, and a multi-channel distribution strategy.

The company serves a diverse customer base that includes residential homeowners, commercial building owners, HVAC contractors, independent dealers, distributors, national account customers, and service providers across the United States, Canada, and selected international markets.

Investment Thesis

▲ Bull case

Lennox International Inc. is positioned to benefit from a structural shift in residential demand toward heat pump adoption, which is being accelerated by regulatory changes and consumer preference for energy efficiency, yet this long-term tailwind remains underappreciated by the market focused on near-term new home construction weakness. The company’s expanded cold-climate heat pump portfolio, including the GOOD DESIGN Award-winning SL22KLV model capable of reliable operation down to -20°F, directly addresses a critical gap in northern markets where heating demand is highest and replacement cycles are most urgent. This innovation not only broadens Lennox’s addressable market but also increases attachment rates through integration with its Ariston joint venture heat pump water heaters, creating a full-home electrification solution that enhances share of wallet. While management highlighted product launches, they understated how these offerings are gaining traction in retrofit and space-constrained applications—areas with less cyclical exposure than new construction—and how backward compatibility with existing ductwork reduces installation friction, a key barrier competitors have not solved. The market is underestimating the durability of this demand shift, which is less tied to interest-rate-sensitive new builds and more driven by replacement economics, utility rebates, and tightening efficiency standards that favor Lennox’s early-mover advantage in cold-climate technology.
The Building Climate Solutions segment is experiencing a multi-year inflection point in national account penetration and emergency replacement scale, yet the market continues to view its strength as cyclical rather than structural, overlooking the durability of its full lifecycle value proposition. Lennox’s emergency replacement initiative, now deployed across most U.S. metro areas through a configured-to-order factory model shifted from Stuttgart, has restored confidence among national accounts by shortening lead times and enabling custom solutions—directly addressing a key pain point in commercial HVAC where downtime costs are severe. This is compounded by the service business benefiting from bundled offerings that increase customer retention and lifetime value, a trend management acknowledged but did not quantify in terms of margin expansion or renewal rates. Crucially, the segment’s 300 basis point margin expansion in Q1 was driven not just by volume but by mix and price benefits from the R454B transition, which has now been fully completed, removing a major headwind and allowing pricing power to flow through more directly. The market is ignoring how these dynamics create a self-reinforcing cycle: stronger national account relationships lead to more service attachments, which improve forecasting and inventory efficiency, reducing under-absorption risk over time—a structural advantage not yet reflected in valuation multiples.
Lennox International Inc. is leveraging its disciplined capital allocation and acquisition integration expertise to generate compounding returns from bolt-on M&A, yet the market fails to recognize how recent deals like DuroDyne and Subco are creating synergistic growth vectors beyond top-line contribution. The integration of these parts and supplies businesses is strengthening attachment rates in both residential and commercial channels by enabling Lennox to offer a more complete solution—from equipment to filters, controls, and maintenance—thereby increasing share of wallet and reducing customer churn. Management noted the on-track integration of Subco and DuroDyne but did not emphasize how these acquisitions are de-risking the supply chain, particularly for critical components affected by Section 232 tariffs, as localized sourcing reduces exposure to volatile import costs and improves gross margin stability. Furthermore, the company’s healthy pipeline of bolt-on opportunities, prioritized for return thresholds, suggests continued accretive growth that is not priced into the stock, especially given Lennox’s proven ability to integrate acquisitions without significant SG&A drag—a capability honed over years of disciplined execution. The market is underestimating the scalability of this model, which turns M&A from a growth tactic into a sustainable compounding engine for both revenue and margin expansion.

Lennox International Inc. is positioned to benefit from a structural shift in residential demand toward heat pump adoption, which is being accelerated by regulatory changes and consumer preference for energy efficiency, yet this long-term tailwind remains underappreciated by the market focused on near-term new home construction weakness. The company’s expanded cold-climate heat pump portfolio, including the GOOD DESIGN Award-winning SL22KLV model capable of reliable operation down to -20°F, directly addresses a critical gap in northern markets where heating demand is highest and replacement cycles are most urgent. This innovation not only broadens Lennox’s addressable market but also increases attachment rates through integration with its Ariston joint venture heat pump water heaters, creating a full-home electrification solution that enhances share of wallet. While management highlighted product launches, they understated how these offerings are gaining traction in retrofit and space-constrained applications—areas with less cyclical exposure than new construction—and how backward compatibility with existing ductwork reduces installation friction, a key barrier competitors have not solved. The market is underestimating the durability of this demand shift, which is less tied to interest-rate-sensitive new builds and more driven by replacement economics, utility rebates, and tightening efficiency standards that favor Lennox’s early-mover advantage in cold-climate technology.
The Building Climate Solutions segment is experiencing a multi-year inflection point in national account penetration and emergency replacement scale, yet the market continues to view its strength as cyclical rather than structural, overlooking the durability of its full lifecycle value proposition. Lennox’s emergency replacement initiative, now deployed across most U.S. metro areas through a configured-to-order factory model shifted from Stuttgart, has restored confidence among national accounts by shortening lead times and enabling custom solutions—directly addressing a key pain point in commercial HVAC where downtime costs are severe. This is compounded by the service business benefiting from bundled offerings that increase customer retention and lifetime value, a trend management acknowledged but did not quantify in terms of margin expansion or renewal rates. Crucially, the segment’s 300 basis point margin expansion in Q1 was driven not just by volume but by mix and price benefits from the R454B transition, which has now been fully completed, removing a major headwind and allowing pricing power to flow through more directly. The market is ignoring how these dynamics create a self-reinforcing cycle: stronger national account relationships lead to more service attachments, which improve forecasting and inventory efficiency, reducing under-absorption risk over time—a structural advantage not yet reflected in valuation multiples.
Lennox International Inc. is leveraging its disciplined capital allocation and acquisition integration expertise to generate compounding returns from bolt-on M&A, yet the market fails to recognize how recent deals like DuroDyne and Subco are creating synergistic growth vectors beyond top-line contribution. The integration of these parts and supplies businesses is strengthening attachment rates in both residential and commercial channels by enabling Lennox to offer a more complete solution—from equipment to filters, controls, and maintenance—thereby increasing share of wallet and reducing customer churn. Management noted the on-track integration of Subco and DuroDyne but did not emphasize how these acquisitions are de-risking the supply chain, particularly for critical components affected by Section 232 tariffs, as localized sourcing reduces exposure to volatile import costs and improves gross margin stability. Furthermore, the company’s healthy pipeline of bolt-on opportunities, prioritized for return thresholds, suggests continued accretive growth that is not priced into the stock, especially given Lennox’s proven ability to integrate acquisitions without significant SG&A drag—a capability honed over years of disciplined execution. The market is underestimating the scalability of this model, which turns M&A from a growth tactic into a sustainable compounding engine for both revenue and margin expansion.

▼ Bear case

Lennox International Inc. remains structurally exposed to the cyclical volatility of the residential new construction market, which continues to weigh on Home Comfort Solutions performance despite management’s optimism about channel restocking, and this dependency creates a persistent earnings drag that is not being adequately priced into the stock. The one-step channel, which is heavily tied to new home starts, remains depressed due to weak builder confidence and affordability constraints, with organic sales volumes down 21% year-over-year in Q1—a decline that, while improved from 32% in the prior year, still reflects deep secular challenges in a segment representing a significant portion of HCS revenue. Management acknowledged that share loss in new construction is “baked into guidance” and will negatively impact performance through the year, yet they offered no concrete strategy to regain lost ground beyond relying on two-step channel recovery, which is more dependent on distributor sentiment than end-user demand. The market may be ignoring how prolonged weakness in new construction could erode installer loyalty and brand preference over time, particularly if competitors gain share through stronger relationships with volume builders—a risk exacerbated by Lennox’s limited ability to influence macroeconomic factors like interest rates and housing supply.
The company’s ability to offset inflationary and tariff-related cost pressures through pricing actions is overstated, as management’s confidence in maintaining price elasticity ignores the growing sensitivity of end-users to total installation costs, where equipment represents only 30–40% of the final price and contractor labor and margins dominate—leaving Lennox vulnerable to pushback if price increases are not matched by perceived value. While Lennox claims it can offset rising input costs (aluminum up 25%, steel up 20–25%, diesel up 50%, copper up 10–15%) through price and productivity, it provided no evidence that its recent price actions have achieved the 90% drop-through rate it targets, nor did it address how competitors might respond in a deflationary volume environment. More critically, the FIFO accounting change means tariff impacts will not hit the income statement until Q3, creating a delayed but significant headwind that could undermine second-half profitability assumptions if cost mitigation efforts fall short. The market may be underestimating the risk that Lennox’s pricing power is weaker than advertised, particularly in price-sensitive replacement markets where consumers have multiple options and financing constraints.
Lennox International Inc.’s free cash flow guidance of $750 million to $850 million for 2026 relies heavily on inventory normalization and assumed profitability recovery, yet this outlook ignores the risk of persistent overstocking in specific SKUs and the working capital strain from ongoing supply chain reconfiguration efforts aimed at mitigating tariff exposure. Although Q1 inventory build was reduced to $60 million from $210 million in the prior year—a sign of discipline—the company is still building inventory for peak season, and any misjudgment in demand timing could lead to renewed under-absorption or obsolescence risk, especially as it shifts production toward U.S.-sourced components to avoid Section 232 tariffs. Management acknowledged that inventory normalization will occur by end of Q2 but did not address the potential for costly production line changes, tooling adjustments, or dual-sourcing expenses that could offset expected SG&A savings from productivity initiatives. Furthermore, the reliance on bolt-on M&A to drive growth introduces integration risk, particularly if acquired businesses like DuroDyne and Subco fail to deliver expected synergies or if cultural misalignment disrupts operations—a concern not discussed despite the company’s active M&A pipeline. The market may be ignoring how these execution risks could constrain free cash flow conversion even if revenue targets are met.

Lennox International Inc. remains structurally exposed to the cyclical volatility of the residential new construction market, which continues to weigh on Home Comfort Solutions performance despite management’s optimism about channel restocking, and this dependency creates a persistent earnings drag that is not being adequately priced into the stock. The one-step channel, which is heavily tied to new home starts, remains depressed due to weak builder confidence and affordability constraints, with organic sales volumes down 21% year-over-year in Q1—a decline that, while improved from 32% in the prior year, still reflects deep secular challenges in a segment representing a significant portion of HCS revenue. Management acknowledged that share loss in new construction is “baked into guidance” and will negatively impact performance through the year, yet they offered no concrete strategy to regain lost ground beyond relying on two-step channel recovery, which is more dependent on distributor sentiment than end-user demand. The market may be ignoring how prolonged weakness in new construction could erode installer loyalty and brand preference over time, particularly if competitors gain share through stronger relationships with volume builders—a risk exacerbated by Lennox’s limited ability to influence macroeconomic factors like interest rates and housing supply.
The company’s ability to offset inflationary and tariff-related cost pressures through pricing actions is overstated, as management’s confidence in maintaining price elasticity ignores the growing sensitivity of end-users to total installation costs, where equipment represents only 30–40% of the final price and contractor labor and margins dominate—leaving Lennox vulnerable to pushback if price increases are not matched by perceived value. While Lennox claims it can offset rising input costs (aluminum up 25%, steel up 20–25%, diesel up 50%, copper up 10–15%) through price and productivity, it provided no evidence that its recent price actions have achieved the 90% drop-through rate it targets, nor did it address how competitors might respond in a deflationary volume environment. More critically, the FIFO accounting change means tariff impacts will not hit the income statement until Q3, creating a delayed but significant headwind that could undermine second-half profitability assumptions if cost mitigation efforts fall short. The market may be underestimating the risk that Lennox’s pricing power is weaker than advertised, particularly in price-sensitive replacement markets where consumers have multiple options and financing constraints.
Lennox International Inc.’s free cash flow guidance of $750 million to $850 million for 2026 relies heavily on inventory normalization and assumed profitability recovery, yet this outlook ignores the risk of persistent overstocking in specific SKUs and the working capital strain from ongoing supply chain reconfiguration efforts aimed at mitigating tariff exposure. Although Q1 inventory build was reduced to $60 million from $210 million in the prior year—a sign of discipline—the company is still building inventory for peak season, and any misjudgment in demand timing could lead to renewed under-absorption or obsolescence risk, especially as it shifts production toward U.S.-sourced components to avoid Section 232 tariffs. Management acknowledged that inventory normalization will occur by end of Q2 but did not address the potential for costly production line changes, tooling adjustments, or dual-sourcing expenses that could offset expected SG&A savings from productivity initiatives. Furthermore, the reliance on bolt-on M&A to drive growth introduces integration risk, particularly if acquired businesses like DuroDyne and Subco fail to deliver expected synergies or if cultural misalignment disrupts operations—a concern not discussed despite the company’s active M&A pipeline. The market may be ignoring how these execution risks could constrain free cash flow conversion even if revenue targets are met.

Statement Geographical Breakdown of Revenue (2025)

Peer group

Peer Comparison

Companies in the HVAC

S.No.	Ticker	Company	match	Market Cap	P/E	P/S	Total Debt (Qtr)
1	TT	Trane Technologies plc	primary	98.27 Bn	47.77	4.42	4.62 Bn
2	JCI	Johnson Controls International plc	primary	87.97 Bn	24.09	3.52	10.03 Bn
3	FIX	Comfort Systems Usa Inc	primary	56.85 Bn	165.41	14.36	0.05 Bn
4	CARR	CARRIER GLOBAL Corp	primary	47.99 Bn	40.84	2.17	11.95 Bn
5	LII	Lennox International Inc	primary	13.02 Bn	16.51	2.46	1.58 Bn
6	MOD	Modine Manufacturing Co	primary	9.82 Bn	-	-	0.44 Bn
7	SPXC	SPX Technologies, Inc.	primary	9.64 Bn	34.77	3.89	0.68 Bn
8	AOS	Smith A O Corp	primary	7.92 Bn	15.84	2.08	0.64 Bn

Lennox International LII

About

Investment Thesis

Segments Breakdown of Revenue (2025)

Statement Geographical Breakdown of Revenue (2025)

Peer Comparison

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