McCormick Allum LLC, at 165 Stafford Street in Springfield, Massachusetts, is the oldest HVAC company in the state, in continuous operation since 1888. The firm delivers commercial and industrial heating, cooling, ventilation, plumbing, and mechanical contracting throughout western Massachusetts and Connecticut, performing nearly all work with in-house refrigeration and service technicians, sheet-metal workers, pipe fitters, plumbers, electricians, designers, and engineers. Services include air conditioning installation and repair, heating systems such as furnaces, boilers, and heat pumps, ductwork installation, refrigeration, and sheet-metal fabrication, with regular office hours Monday through Friday and around-the-clock emergency service. The company's own website does not advertise dedicated ground-source geothermal installation; a third-party geothermal directory lists the firm, but that claim is not confirmed on its primary site, so its geothermal scope is flagged for editorial review.
Verified active operator per https://www.mccormick-allum.com/ (Bundle 4 audit 2026-05-28)
Springfield-based geothermal contractor specializing in ground source heat pump design and installation for Hampden County residential and commercial properties.
