Can Comfort Systems' 81% Electrical Growth Keep Outpacing Mechanical?

Comfort Systems USA, Inc. FIX is seeing exceptional demand across both of its operating segments, but Electrical has emerged as the faster-growing business. In the second quarter of 2026, Electrical revenues surged 81.2% year over year to $969 million compared with a 40.2% increase in Mechanical revenues to $2.30 billion. The performance lifted Electrical’s share of company revenues to 29.7% from 24.6% a year earlier, signaling a meaningful shift in FIX’s revenue mix.

Technology demand, particularly data-center activity, has been the primary growth catalyst. Of the $434.3 million year-over-year increase in Electrical revenues, $301.7 million came from same-store operations, with the Texas electrical business alone contributing $186.6 million of incremental revenues from higher technology-sector activity. The remaining $132.6 million came from the Hunt Electric, Feyen Zylstra and Meisner acquisitions. Thus, acquisitions amplified the growth rate, but the strength was not merely deal-driven; underlying Electrical activity also expanded sharply.

However, Mechanical is hardly losing momentum. It remains Comfort Systems’ largest business, accounting for 70.3% of second-quarter revenues, and nearly all of its $658 million revenue increase came from same-store activity. Technology projects at operations in Texas, Indiana and North Carolina were major contributors. Mechanical also showed stronger margin improvement: its gross margin climbed to 25.6% from 22.9%, while Electrical margin increased to 26.4% from 25.3%. The backlog also provides considerable runway. Mechanical backlog reached $10.06 billion, while Electrical backlog stood at $4 billion, with both increasing roughly 73% year over year.

Electrical could continue outpacing Mechanical in the near term, supported by data-center demand, acquisitions and strong bookings. Still, sustaining an 81% growth rate will become harder as acquisition benefits normalize and comparisons toughen. Mechanical’s larger scale, strong organic growth and margin gains suggest both segments will remain key contributors to Comfort Systems’ growth.

Comfort Systems, EMCOR & Quanta: Who Has the Electrical Edge?

Comfort Systems stands out against EMCOR Group, Inc. EME and Quanta Services, Inc. PWR for the pace of its Electrical growth. Strong data-center demand, rising technology-sector activity and recent acquisitions have strengthened the Electrical business and helped it outpace Mechanical growth.

EMCOR is also benefiting from robust data-center activity, although its Mechanical Construction business grew faster than Electrical in the second quarter of 2026. Electrical Construction revenues increased 24% to $1.66 billion, supported largely by a 45% increase in network and communications revenues, while Mechanical Construction revenues rose more than 31% to $2.3 billion as data-center cooling demand accelerated. EMCOR’s record $17.14 billion RPOs provide additional visibility.

Quanta offers broader exposure to the infrastructure buildout through electric power, technology and large-load markets. Its backlog reached a record $53 billion during the second quarter of 2026, while the company continues expanding self-perform electrical, mechanical, civil and fabrication capabilities. Quanta is also scaling its technology platform with hyperscalers and has roughly 7.5 million square feet of fabrication capacity following recent acquisitions.

FIX Stock’s Price Performance & Valuation Trend

Shares of this leading building and service provider for mechanical, electrical and plumbing building systems have surged 73.1% year to date (YTD), outperforming the Zacks Building Products - Air Conditioner and Heating industry, the broader Construction sector and the S&P 500 Index.

FIX YTD Share Price Performance

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FIX stock is currently trading at a premium compared with the industry, with a forward 12-month price-to-earnings (P/E) ratio of 29.92, as evidenced by the chart below.

FIX P/E Ratio (Forward 12-Month) vs. Industry

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Earnings Estimate Trend for FIX

FIX’s earnings estimates for 2026 and 2027 have increased over the past 30 days to $45.86 and $58.33 per share, respectively. The revised estimates for 2026 and 2027 imply year-over-year growth of 38.3% and 58.8%, respectively. 

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Comfort Systems stock currently flaunts 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).

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