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Is a 90% Backlog Jump Enough to Lift Comfort Systems' 2027 Growth?
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Key Takeaways
Comfort Systems' backlog jumped 90% year over year to $17.8 billion, with same-store backlog up 85%.
Technology accounted for 59% of nine-month revenues, while management expects same-store growth in 2027.
Labor constraints, rising costs and project delays could challenge backlog conversion.
Comfort Systems USA, Inc. (FIX - Free Report) is entering 2027 with substantial growth visibility after reporting a record backlog, supported by robust demand for mechanical and electrical contracting services. As of Sept. 30, 2026, backlog reached $17.8 billion, up 90% year over year and 27% sequentially. The increase was not just acquisition-led: same-store backlog climbed 85% year over year, reflecting strong technology-related bookings.
The demand backdrop remains favorable for FIX. Technology accounted for 59% of revenues in the first nine months of 2026, up from 42% a year earlier, while industrial customers generated 76% of sales. Data centers were a key growth driver. Management expects same-store revenues to grow in the mid-20% range in 2027, following anticipated mid-40% growth in 2026. Modular operations, alongside traditional construction, are also expanding, with capacity expected to reach approximately 6 million square feet by year-end 2027.
However, converting backlog into profitable growth will depend on execution. Management cited labor availability as the main constraint on industry capacity, alongside rising labor costs and intermittent equipment and material delays. A higher mix of equipment and materials also weighed on sequential margins, while large projects are still in early stages where profit estimates remain less certain. Further, backlog mainly reflects contracted installation and replacement work and is not a guarantee of revenues across multiple quarters.
Overall, strong bookings, data-center investment and capacity expansion support Comfort Systems’ 2027 outlook. Still, labor availability, supply-chain conditions and disciplined project execution will determine how much of its record backlog translates into sustained earnings growth.
Comfort Systems, Carrier & Watsco: Who Owns the Next Wave?
Comfort Systems, along with Carrier Global Corporation (CARR - Free Report) and Watsco, Inc. (WSO - Free Report) , can benefit from HVAC and data-center spending, though their business models differ.
Carrier enjoys robust demand, with strong commercial HVAC and data-center orders, while long-term supply agreements add longer-term visibility beyond its backlog. Watsco benefits from improving residential replacement demand, a distribution network, acquisitions and digital tools that deepen contractor relationships. FIX leads in project visibility and execution, not across the entire HVAC value chain.
Notably, Comfort Systems has an advantage in executing complex, large-scale infrastructure projects. In contrast, Carrier benefits from product innovation and long-term customer agreements, and Watsco from distribution scale and contractor relationships.
FIX Stock’s Price Performance & Valuation Trend
Shares of this Texas-based heating, ventilation, air conditioning and electrical contracting service provider have climbed 28.6% so far this year, outperforming the Zacks Building Products - Air Conditioner and Heating industry, the Zacks Construction sector and the S&P 500 Index.
Image Source: Zacks Investment Research
FIX stock is currently trading at a premium compared with its industry peers, with a forward 12-month price-to-earnings (P/E) ratio of 19.08, as the trend lines suggest below.
Image Source: Zacks Investment Research
Earnings Estimate Trend of FIX
FIX’s earnings estimates for 2026 and 2027 reflect an upward trend over the past 60 days, currently settling at $50.18 and $65.30 per share, respectively. The revised estimates for 2026 and 2027 imply year-over-year growth of 73.8% and 30.1%, respectively.
View the Zacks #1 Rank List
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Is a 90% Backlog Jump Enough to Lift Comfort Systems' 2027 Growth?
Key Takeaways
Comfort Systems USA, Inc. (FIX - Free Report) is entering 2027 with substantial growth visibility after reporting a record backlog, supported by robust demand for mechanical and electrical contracting services. As of Sept. 30, 2026, backlog reached $17.8 billion, up 90% year over year and 27% sequentially. The increase was not just acquisition-led: same-store backlog climbed 85% year over year, reflecting strong technology-related bookings.
The demand backdrop remains favorable for FIX. Technology accounted for 59% of revenues in the first nine months of 2026, up from 42% a year earlier, while industrial customers generated 76% of sales. Data centers were a key growth driver. Management expects same-store revenues to grow in the mid-20% range in 2027, following anticipated mid-40% growth in 2026. Modular operations, alongside traditional construction, are also expanding, with capacity expected to reach approximately 6 million square feet by year-end 2027.
However, converting backlog into profitable growth will depend on execution. Management cited labor availability as the main constraint on industry capacity, alongside rising labor costs and intermittent equipment and material delays. A higher mix of equipment and materials also weighed on sequential margins, while large projects are still in early stages where profit estimates remain less certain. Further, backlog mainly reflects contracted installation and replacement work and is not a guarantee of revenues across multiple quarters.
Overall, strong bookings, data-center investment and capacity expansion support Comfort Systems’ 2027 outlook. Still, labor availability, supply-chain conditions and disciplined project execution will determine how much of its record backlog translates into sustained earnings growth.
Comfort Systems, Carrier & Watsco: Who Owns the Next Wave?
Comfort Systems, along with Carrier Global Corporation (CARR - Free Report) and Watsco, Inc. (WSO - Free Report) , can benefit from HVAC and data-center spending, though their business models differ.
Carrier enjoys robust demand, with strong commercial HVAC and data-center orders, while long-term supply agreements add longer-term visibility beyond its backlog. Watsco benefits from improving residential replacement demand, a distribution network, acquisitions and digital tools that deepen contractor relationships. FIX leads in project visibility and execution, not across the entire HVAC value chain.
Notably, Comfort Systems has an advantage in executing complex, large-scale infrastructure projects. In contrast, Carrier benefits from product innovation and long-term customer agreements, and Watsco from distribution scale and contractor relationships.
FIX Stock’s Price Performance & Valuation Trend
Shares of this Texas-based heating, ventilation, air conditioning and electrical contracting service provider have climbed 28.6% so far this year, outperforming the Zacks Building Products - Air Conditioner and Heating industry, the Zacks Construction sector and the S&P 500 Index.
Image Source: Zacks Investment Research
FIX stock is currently trading at a premium compared with its industry peers, with a forward 12-month price-to-earnings (P/E) ratio of 19.08, as the trend lines suggest below.
Image Source: Zacks Investment Research
Earnings Estimate Trend of FIX
FIX’s earnings estimates for 2026 and 2027 reflect an upward trend over the past 60 days, currently settling at $50.18 and $65.30 per share, respectively. The revised estimates for 2026 and 2027 imply year-over-year growth of 73.8% and 30.1%, respectively.
Image Source: Zacks Investment Research
Comfort Systems currently sports a Zacks Rank #1 (Strong Buy). You can see the complete list of today’s Zacks #1 Rank stocks here.