Can Comfort Systems' Mechanical Margins Offset Electrical Weakness?
Comfort Systems USA, Inc. FIX delivered strong revenue growth across its Mechanical and Electrical segments in the third quarter of 2026. However, the two businesses recorded different margin trends. Mechanical profitability improved, while Electrical margins declined from the prior-year period. This difference in performance is relevant to the company's overall profitability.
Mechanical revenues increased 43% year over year, while the segment's gross margin expanded 80 basis points to 25.1% from 24.3%. Higher activity levels and improved profitability supported the segment's performance. Electrical revenues grew at a faster rate of 85%, but gross margin declined 190 basis points to 24.3% from 26.2% a year ago.
Electrical margins in the prior-year quarter benefited from discrete gains, including a gain related to a customer emerging from bankruptcy. These items added approximately 1.8 percentage points to the segment's gross margin. Excluding this benefit, Electrical margins were roughly flat year over year. As a result, the reported decline largely reflects the absence of these prior-year gains rather than a broad deterioration in the segment's underlying margin performance.
At the consolidated level, gross margin remained unchanged at 24.8% in the third quarter, while operating margin improved to 16.6% from 15.5%. Mechanical margin expansion supported profitability, while the prior-year gains in Electrical created a higher comparison base. Comfort Systems expects gross profit margins in 2027 to remain within the strong ranges achieved over recent quarters. This indicates that the company expects to maintain its recent level of gross profitability despite differences in segment-level margin trends.
Comfort Systems and Its Competitive Position
Comfort Systems USA competes with AAON, Inc. AAON and Carrier Global Corporation CARR in commercial HVAC and data center cooling markets. Rising data center investments are increasing demand for specialized cooling solutions. Product capabilities, manufacturing capacity and established customer relationships remain important factors in serving these markets.
AAON benefits from a differentiated HVAC portfolio, established sales channels and customer relationships. The company is also expanding manufacturing capacity and strengthening its BASX business to address growing demand for data center thermal management solutions. AAON's third-quarter gross margin declined 110 basis points year over year to 26.7%. Faster growth in BASX created a brand-mix headwind of more than 300 basis points. However, higher production volumes and improved cost trends supported margin gains in AAON Coil Products and BASX.
Carrier offers a broad commercial HVAC portfolio, including chillers, cooling distribution units and building management systems. Investments in digital technologies, AI and field service capabilities support its efforts to provide integrated building solutions. Carrier's adjusted operating margin expanded 260 basis points in the third quarter, supported by organic growth and pricing. However, higher input costs and slower-than-expected price realization pressured margins in its Americas segment. The company is implementing additional pricing and cost measures to address these pressures.
FIX Stock’s Price Performance & Valuation Trend
Shares of this Texas-based heating, ventilation, air conditioning and electrical contracting service provider have climbed 19.3% so far this year, outperforming the Zacks Building Products - Air Conditioner and Heating industry, the Zacks Construction sector and the S&P 500 Index.
FIX Price Performance (YTD)
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FIX stock is currently trading at a discount compared with its industry peers, with a forward 12-month price-to-earnings (P/E) ratio of 17.7, as the trend lines suggest below.
FIX P/E (F12M)
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Earnings Estimate Trend of FIX
FIX’s earnings estimates for 2026 and 2027 reflect an upward trend over the past 30 days, currently settling at $49.96 and $65.90 per share, respectively. The revised estimates for 2026 and 2027 imply year-over-year growth of 73% and 31.9%, respectively.
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Comfort Systems currently sports a Zacks Rank #1 (Strong Buy). You can see the complete list of today’s Zacks #1 Rank stocks here.
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This article originally published on Zacks Investment Research (zacks.com).
