Exhibit 99.1 CONTACT:Julie Shaeff, Chief Accounting Officer 675 Bering Drive, ir@comfortsystemsusa.com; 713-830-9687 Houston, Texas 77057 Suite 400 713-830-9600 FOR IMMEDIATE RELEASE COMFORT SYSTEMS USA REPORTS SECOND QUARTER 2025 RESULTS Houston, TX — July 24, 2025 — Comfort Systems USA, Inc. (NYSE: FIX) (the "Company") today reported results for the quarter ended June 30, 2025. For the quarter ended June 30, 2025, net income was $230.8 million, or$6.53 per diluted share, as compared to $134.0 million, or ...