DEERFIELD, IL, April 21, 2026 — PremiStar, an industry leader providing commercial and industrial HVAC, plumbing, and building automation services, announced today that Armistead Mechanical has joined the PremiStar family of companies. This partnership extends PremiStar’s capabilities to New Jersey and the Hudson Valley region of New York and strengthens its commitment to customers in the industrial/manufacturing, healthcare/senior living, education, pharmaceutical, commercial real estate, and property management sectors.

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DEERFIELD, IL, February 13, 2026 — PremiStar, an industry leader providing commercial and industrial HVAC, plumbing, and building automation services, announced today that McCormick Allum, a commercial HVAC mechanical contractor in Springfield, MA, has partnered with Air Temp Mechanical, a PremiStar company headquartered in Berlin, CT.

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DEERFIELD, IL, October 21, 2025 — PremiStar, an industry leader providing commercial and industrial HVAC, plumbing, and building-automation services, announced today that Smith’s Refrigeration, a full-service mechanical contractor in Lumberton, North Carolina, has joined the PremiStar family of companies. This partnership extends PremiStar’s capabilities in North Carolina and South Carolina and strengthens its commitment to customers in the healthcare, senior living, education, research, manufacturing, and government sectors. Smith’s Refrigeration was advised by Copper Run of Columbus, Ohio.

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DEERFIELD, IL, July 22, 2025 — PremiStar, an industry leader providing commercial and industrial HVAC, plumbing, and building automation services, announced today that Rabe Environmental Systems, a mechanical contractor in Erie, PA, has joined the PremiStar family of companies.

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DEERFIELD, IL, July 16, 2025 — PremiStar, an industry leader providing commercial and industrial HVAC, plumbing, and building automation services, announced today that Farmer & Irwin, a mechanical contractor based in Riviera Beach, Florida, has joined the PremiStar family of companies.

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DEERFIELD, IL, June 17, 2025 — PremiStar, an industry leader providing commercial and industrial HVAC, plumbing, and building automation services, announced today that B.T. Lindsay & Co., a commercial HVAC design/build installation and service provider in West Hartford, CT., has partnered with Air Temp Mechanical, a PremiStar company headquartered in Berlin, CT.

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DEERFIELD, IL, March 4, 2025 — PremiStar, a leader in commercial and industrial HVAC, plumbing, and building automation services, has acquired the HVAC services division of Dahme Mechanical Industries, Inc., based in Countryside, IL. This acquisition expands PremiStar’s service capabilities in northern Illinois and northwest Indiana.

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DEERFIELD, IL, January 21, 2025 — PremiStar, a leader in commercial and industrial HVAC, plumbing, and building automation services, has partnered with Air Temp Mechanical, Connecticut’s largest independent commercial HVAC contractor.

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DEERFIELD, IL, January 15, 2025 — PremiStar, a leader in commercial and industrial HVAC, plumbing, and building automation services, has partnered with Trademark Mechanical, a commercial HVACR and controls contractor in Elmsford, NY, a suburb of New York City. PremiStar’s first expansion in the state of New York, this partnership extends the company’s national footprint to encompass the NYC metropolitan area, strengthening its commitment to customers in the manufacturing, technology, education, healthcare, commercial/industrial, and property management segments.

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DEERFIELD, IL, December 10, 2024 — PremiStar, a leader in commercial and industrial HVAC, plumbing, and building automation services, has partnered with Chadwick Service Company, a commercial heating and air conditioning contractor based in Bensalem, PA, a suburb of Philadelphia.

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