Welcome to TMS Service

Heating & Cooling Professionals


Companies, building supervisors and property managers all throughout South Eastern Wisconsin trust TMS Service with their commercial heating & cooling needs.

Unmatched experience and a friendly staff make TMS Service a valued contracting partner.

No one knows more about downtown Milwaukee’s HVAC needs. For over 30 years we’ve been the experts on commercial HVAC. Whether steam heat or state-of-the-art high effcient hot water boilers call TMS Service today.

» About Us

How Can We Be of Service

Years of experience makes a difference to our customers. Through the years we’ve witnessed a lot of HVAC technology come and go and we’ve learned what really works, what’s reliable, and what brings the best return on investment for our clients. Regardless of the size of your project call TMS Service today for a quote or review how we might make your surrounding enviornment far more comfortable. Whether the blazing uncomfortable heat of summer or the dreadful stinging cold of winter in Wisconsin TMS Service will make your home and work a cozy, enjoyable, and inviting place to be.

We are a Full Service Contractor and provide industrial, commerical, residential heating & air conditioning service or replacement installation. Here’s a list of just some of the services we provide in the Greater Milwaukee area:

Industrial, Commercial, and Residential

Heating and Air Conditioning service, repair, and replacement

Air Conditioning Sales, Service, Cleaning, and Repair

Heating Equipment Furnace Sales, Service, Cleaning, and Repair

Boilers - Sales, Service, Repair, and Cleaning

Radiant Heating

Heating & Air Conditioning - Filters


Make Up Air

Air Purifying & Cleaning Systems & Equipment

Kitchen Hoods


Water Heat Pump - Sales & Service

General Repair Services

Air Duct Systems

Sheet Metal & Piping

About us

TMS Service is a enduring family owned business that echos the quintesential American dream story line. Starting in his garage in the early 1980’s Jerry Schmitz took the route of the typical entreprenuer. Tired of the inconsistent work as a steam fitter coming out of the 70’s Jerry was armed with only an overloaded pickup truck filled with tools, a relecuntant young family, and a natural ability to lead. Together they did what they could to build their fledging Heating & AC business.

30 plus year later with Jerry’s love of Milwaukee and genuine friendly nature he quickly made a name for himself as a Milwaukee area HVAC expert. TMS employees are regulars in Milwaukee’s Third Ward District working on old steam systems or adding state-of-the-art equipment to many of the reclamation projects. Home owners throughout the area use and trust TMS Service for their general Heating & Air Conditioning repair and new installations. It’s the years of experience that make a difference to TMS’ customers. They trust the people and the work of TMS Service, they know that Jerry and his staff standbye what they do.


Years in Buisness


Satisfied clients


Hours a Day


Days a Week


TMS Service is proud to be an Armstrong Air Dealer. While we will use the best equipment available to get the job done right, we primarily use Armstrong Products.

Armstrong has been at the forefront of emerging feature and quality impromements in the HVAC industry since 1928. Every piece of equipment in the Armstrong Air lineup is designed to deliver substantial durability, comfort, and energy efficiecy, with leading-edge technology and brilliant features throughout.

Armstong Products

Contact us

Contact Info



Mailing Address:
2329 S. 71st Street
West Allis, WI 53219

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