Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
Lennox InternationalMIL:1LII 93 3-Year ROIIC % is 23.84 as of Dec. 2025, which is 40% below its 10-year median of 39.81. GuruFocus rates MIL:1LII with a GF Score™ of 93/100 and a GF Value™ of €501.24. The stock has 3 warning signs investors should review. Among 1,685 Construction companies, Lennox International ranks better than 77.09% on this metric.
3-Year Return on Invested Incremental Capital (3-Year ROIIC %) measures the change in earnings as a percentage of change in investment over 3-year.
Lennox International's 3-Year ROIIC % for the quarter that ended in Dec. 2025 was 23.84%. High ROIIC is generally an indication that your business is capital efficient or has a higher operating leverage.
The industry rank for Lennox International's 3-Year ROIIC % or its related term are showing as below:
MIL:1LII's 3-Year ROIIC % is ranked better than 77.09% of 1685
companies
in the Construction industry
Industry Median: 4.63
vs MIL:1LII: 23.84
Lennox International (MIL:1LII) 3-Year ROIIC % Explanation
Return on Incremental Invested Capital (ROIIC) is an extension of Return on Investment Capital (ROIC). ROIC % tells investors how efficiently that profitability is earned per dollar of company capital. ROIIC narrows the focus even further and shows how profitable each additional unit of capital investment could be. ROIIC % is a more powerful metric than ROIC because it measures how much money the company can generate going forward on future capital investments.
High ROIIC is generally an indication that your business is capital efficient or has a higher operating leverage.
Be Aware
It's important to keep in mind that when tracking ROIIC, the metric is better suited to forecasting the trend of future returns rather than measuring current return on investment.
Lennox International 3-Year ROIIC % Related Terms
Lennox International 3-Year ROIIC % Historical Data
* Premium members only.
The historical data trend for Lennox International's 3-Year ROIIC % can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
MIL:1LII vs MAIR, MAS, CSL: 3-Year ROIIC % Comparison
For the Building Products & Equipment subindustry, Lennox International's 3-Year ROIIC %, along with its competitors' market caps and 3-Year ROIIC % data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Lennox International 3-Year ROIIC % vs Construction Industry
For the Construction industry and Industrials sector, Lennox International's 3-Year ROIIC % distribution charts can be found below:
* The bar in red indicates where Lennox International's 3-Year ROIIC % falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
** Annual data of NOPAT and Invested Capital was used to calculate 3-Year ROIIC %.
*** Please be aware that the ROIIC (Return on Invested Capital) calculations are based on company-level data using the primary share class. The calculated data provided is for demonstration purposes and may slightly differ from the results displayed in the title due to potential variations caused by currency exchange rate differences throughout the year.
Lennox International (MIL:1LII) has a 3-Year ROIIC % of 23.84 as of Dec. 2025. 3-Year ROIIC % measures the change in earnings as a percentage of change in investment over 3-year. View historical data on Lennox International and its competitors. This is 40% below median its historical median of 39.81. Over the past decade, Lennox International's 3-Year ROIIC % has ranged from 23.84 to 1,028.15. According to the industry distribution chart, Lennox International ranks #386 out of 1685 companies in the Construction industry, placing it in the top 22.9%.
Is Lennox International's 3-Year ROIIC % too high?
Lennox International's current 3-Year ROIIC % of 23.84 is 40% below median its 10-year median of 39.81. Over the past 10 years, this metric has ranged from a low of 23.84 to a high of 1,028.15. The Construction industry median 3-Year ROIIC % is 4.63. Lennox International's value of 23.84 is 414.9% above this industry median. Based on the distribution chart, Lennox International ranks #386 out of 1685 companies in the Construction industry, which is in the top quartile — a strong position relative to peers. Overall, Lennox International has a GF Score™ of 93/100, reflecting its overall financial health beyond just this single metric.
How does Lennox International's 3-Year ROIIC % compare to MAIR and MAS?
According to the Construction industry distribution chart, Lennox International ranks #386 out of 1685 companies for 3-Year ROIIC %. This places Lennox International in the top 23% of its industry — outperforming the majority of peers. The industry median 3-Year ROIIC % is 4.63. Lennox International's value of 23.84 is 414.9% above this benchmark. Historically, Lennox International's own 3-Year ROIIC % has ranged from 23.84 to 1,028.15 over the past decade. While the company's 10-year median is 39.81 vs. the industry median of 4.63, Lennox International has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 3-Year ROIIC % for a Construction company?
The median 3-Year ROIIC % among Construction companies is 4.63, based on 1,685 companies in the industry. Companies in the top quartile (top 25%) have a 3-Year ROIIC % significantly above this median, while those in the bottom quartile fall well below. However, 3-Year ROIIC % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Lennox International's current 3-Year ROIIC % of 23.84 is 414.9% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 3-Year ROIIC % mean?
A high 3-Year ROIIC % can signal that a stock is expensive relative to its fundamentals. 3-Year ROIIC % measures the change in earnings as a percentage of change in investment over 3-year. View historical data on Lennox International and its competitors. For the Construction industry, the median 3-Year ROIIC % is 4.63 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Lennox International's current 3-Year ROIIC % is 23.84, which is 40% below median its own 10-year median of 39.81. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Lennox International stock overvalued right now?
Lennox International (MIL:1LII) has a current 3-Year ROIIC % of 23.84. The stock's GF Value™ is €501.24, compared to a current price of €493.20 — trading 1.6% below its estimated fair value. The current 3-Year ROIIC % is 23.84, which is 40% below median its 10-year median of 39.81 and 414.9% above the Construction industry median of 4.63. Lennox International's overall GF Score™ is 93/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-Year ROIIC % calculated?
3-Year ROIIC % is calculated from a company's financial statements. For Lennox International (MIL:1LII), the current 3-Year ROIIC % is 23.84 as of Dec. 2025. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Lennox International (MIL:1LII) Overvalued in 2026?
Based on GuruFocus' analysis, Lennox International stock appears to be undervalued.
The current stock price of €493.20 is trading 1.6% below its estimated GF Value™ of €501.24.
Key valuation signals for MIL:1LII:
3-Year ROIIC %: 23.84 (40% below median its 10-year median of 39.81)
GF Value™: €501.24 vs. price of €493.20 (1.6% below fair value)
Industry Position: 414.9% above the Construction median (#386 of 1685)
No single metric tells the full story. See the MIL:1LII stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Lennox International manufacturers and distributes heating, ventilating, air conditioning, and refrigeration products for the North American replacement (75% of sales) and new construction (25% of sales) markets. Residential HVAC (home comfort solutions) accounts for 67% of sales and commercial HVAC (building climate solutions) accounts for the remaining 33% of sales. Lennox's commercial exposure is what its peers refer to as residential and light commercial, and lacks the scale and complexity of what is referred to as an applied solution. The company goes to market with multiple brands, but Lennox is its flagship HVAC brand.
93GF Score
Get the complete analysis for MIL:1LII
3-Year ROIIC % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
MIL:1LII has been successfully added to your 
