Comfort Systems (MEP contractor) reports $12B backlog from AI data center construction and facility work

As AI data center construction expands across the U.S., demand is rising for companies that supply the power, cooling, and mechanical systems required to keep those facilities operational. Comfort Systems is capitalizing on this buildout with a $12 billion sales backlog, while maintaining exposure to hospitals, schools, and commercial buildings.

The expansion ties to a broader U.S. infrastructure push, including a stated $500 billion Project Stargate initiative and a wider onshoring boom. According to IndustrialSage, $1.77 trillion has already been committed to U.S. manufacturing and industrial investments, supporting expectations for higher construction demand, greater fiber capacity, and increased copper usage.

Data center reliability creates additional demand for specialized contractors. These facilities are expected to operate with 99.999% uptime, a standard that requires highly engineered cooling and related building systems at scale.

Comfort Systems' $12 billion backlog reflects this trend, while the company continues to serve hospitals, schools, universities, and commercial buildings. The company's earnings tripled between 2021 and 2024, before the AI data center boom fully accelerated, with per-share profits growing at an average rate of 78% over the past three years.

This diversified end-market exposure suggests Comfort Systems is not dependent on a single growth driver. For investors, the investment thesis rests on the company's role in a long-duration U.S. buildout where cooling, electrical, and plumbing infrastructure remain essential to expanding data center capacity.

Parallels exist in the broader power infrastructure push. National Grid's U.S. grid expansion includes a confirmed $1.75 billion investment for a 35% stake in Joulent, backed by a multi-year capital program across UK and U.S. networks. While technical indicators remain mixed, the strategic push to expand power infrastructure aligns with rising electricity demand and long-term electrification trends.