Trefz Mechanical
Forming Partnerships That Redefine Construction

Trefz Mechanical Logo

Trefz Mechanical, Inc. (TMI) encompasses more than 40 years’ experience in the HVAC, plumbing, and electrical industries. Our commercial customers include educational facilities, office buildings, retirement communities, municipal buildings and healthcare organizations.  Read More…

We’re Proud of our “Excellence in Construction” Award!

Trefz Mechanical, Inc. recently won the Associated Builders & Contractors (ABC) Eastern Pennsylvania chapter’s “Excellence in Construction” award! This achievement stems from our CUP renovation efforts for MRA Group’s Springhouse Innovation Park in Ambler, PA.
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Featured Projects


HVAC Services

HVAC Services

With more than 40 years of HVAC experience, Trefz understands that a successful project relies on the contractor and customer working as partners with one common goal.

Commercial Electrical Services

Commercial Electrical

Trefz’s fully seasoned team of electrical specialists includes highly experienced project managers working with master electricians proficient in today’s latest systems and technologies.

Commercial Plumbing Services

Commercial Plumbing

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.

Trefz Mechanical Installation Services

Fast Support When You Need it!

Trefz Mechanical, Inc. serves the Tri-State area of Pennsylvania, New Jersey and Delaware. We will troubleshoot any problem quickly, 24/7/365, in order to minimize repair costs. Call us today for your ductwork modifications, process piping installation or equipment replacement/retrofit.

Licensed, Insured and Bonded.


Contact us for a free consultation.


“Our firm relied on Trefz for replacement and upgrade of RTUs, split systems, cast iron boilers, condensing boilers, computer room air conditioners, unit heaters, etc., along with ductwork modification and installation, electrical work, and updates to the controls and the building management system, to incorporate the new equipment at various types of facilities from municipal buildings to community centers to a firehouse. We find Trefz competent in their field, knowledgeable, responsible, efficient, cooperative, and pleasant to work with and look forward to continuing to work with them on future projects.”

- Joann Ma

Architectural Engineers, Pennoni Associates