Trefz Mechanical, Inc.’s HVAC services include installation and maintenance of heating systems, steam and steam condensate piping systems, steam and hot water boilers, chilled water systems, condenser water systems, chillers, cooling towers, variable refrigerant flow systems (VRF), traditional refrigerant-based systems, packaged rooftop units, central air handlers, heat exchangers, terminal units, sheet metal, natural gas piping, fuel oil piping, process piping, controls, and more.

Trefz is fully fit with 3D CAD capabilities to streamline coordination, prefabrication, and installation with the use of laser layout systems. This streamlines projects, minimizes errors, and facilitates higher quality construction. We are experienced in steel, stainless steel, copper, polypropylene, PVC and CPVC materials and jointing methods, and use industry-leading methods and equipment for pipe fabrication including:

  • Threading
  • Welding
  • Brazing
  • Soldering
  • Grooving
  • ProPress
  • MegaPress
  • Butt fusion, socket fusion, and electrofusion


“Among the many aspects that impress me about Trefz Mechanical is how conscious they are of their environment and how incredibly organized they are. They completed a $125k HVAC and electrical upgrade project for us and made sure they were as unobtrusive as possible since our church was functioning with services, weddings, etc. at the same time. You’d hardly know there was this huge project going on behind the scenes! They’re also a super “clean” company, which is a rarity these days. Moreover, after completion of the job they presented me with this incredibly organized, alphabetical parts binder complete with diagrams and even a table of contents. I would give them a big A+ overall and highly recommend them to others.”

- Tom Martin

Director of Buildings and Grounds, Our Lady of the Sacred Heart