Comfort Systems USA IncCompany is expanding Modular capacity with capex about 5% of 2026 revenues and investments paying back within one to two years.

Comfort Systems USA is expanding its Modular business to capture sustained demand from customers building large-scale technology infrastructure, combining higher production capacity with customer commitments to limit the risk of speculative investment. Modular accounted for 17% of revenues in the first six months of 2026, with production capacity surpassing 3.5 million square feet and expected to exceed 4 million square feet by year-end, on the way to about 5 million square feet by late summer 2027. Modular generated $510 million of bookings in the second quarter, adding more than $500 million to backlog after accounting for the strong pace of revenue recognized, and management said customers continue to seek as much Modular capacity as Comfort Systems can produce. The company expects capital expenditures to equal about 5% of 2026 revenues, and management indicated that Modular investments have achieved full paybacks within one to two years, with customer volume commitments including from two hyperscalers helping reduce the risk of adding capacity. Comfort Systems competes with EMCOR Group and Quanta Services across mechanical and electrical construction, mission-critical projects and large-scale infrastructure, and its shares have surged 70.4% year to date, trading at a forward 12-month price-to-earnings ratio of 29.09, while earnings estimates for 2026 and 2027 have moved upward in the past 30 days to $46.40 and $58.31 per share, implying year-over-year growth of 60.7% and 25.7%.
Comfort Systems USA IncCompany is expanding Modular capacity with capex about 5% of 2026 revenues and investments paying back within one to two years.
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