Gartman will design/build your HVAC/Refrigeration systems with our in-house auto desk design software. We offer full or partial design with the ability to provide state approved plans for all of your engineering needs.

The professionals at Gartman Mechanical are available for any of your process requirements, new construction, or service needs to existing equipment. We offer design build services, sheet metal services, hot water, steam, chilled water piping and much more. Ourqualified technicians aptly handle the challenges of energy efficiency, building occupancy, heating/cooling, load calculation, equipment selection, and budget considerations.

Gartman Mechanical will install & maintain your system to operate at optimum performance & efficiency. Our technicians are fully trained with the ability to repair any make or model.

24-hour emergency services at 920-231-5530.

To schedule a repair or to request a free estimate, please call us at 920-231-5530 or send an email to This email address is being protected from spambots. You need JavaScript enabled to view it.

 gartman chill

Other servces include:

  • Variable Air Volume (VAV)
  • Unitary Heat Pump
  • Single/Multi Zone Rooftop
  • Dual Duct
  • Dust and Fume Collection (Donaldson Torit, Messer)
  • Fan Coil
  • Induction
  • Chilled and Hot Water
  • Direct Expansion Cooling
  • Energy Recovery
  • Kitchen Hood Ventilation Systems
  • Kitchen Cook Ovens and Flat Top Repair
  • Commerical Ovens
  • Process Air Repair
  • Steam Piping
  • Ducted Supply, Return and Exhaust
  • Boiler Feedwater Systems
  • Process Air, Chiller, Gas and Hot Water Piping


  • Boilers
  • Heat Exchanger
  • Chillers
  • Cooling Towers
  • Evaporative Coolers
  • Pump
  • Air Handling Units
  • Roof Top Units
  • Condensing Units
  • Humidifiers
  • Electrostatic Filters
  • Heat Exchangers
  • Door Heaters
  • Stack Economizers
  • Incinerators Air Separators

GMS, Inc. can also provide the following services:

  • Cascade Systems
  • PSM Cad Drawing Services
  • Design/Build Turnkey Projects
  • Service and Maintenance
  • Refrigeration Control Systems
  • Refrigeration Parts and Service

We also specialize in the installation of all types of refrigeration equipment such as:

  • Walk-in Coolers
  • Walk-in Freezers
  • Ice Merchandisers
  • Ice Cream Freezer
  • Open Air Cases
  • Reaching Freezers and Coolers
  • Evaporative Condenser
  • Self-Contained Package Unit

Client Testimonials

  • Thank you to everyone I needed. From the office to the service technicians. I will always show respect. Thank you,


  • Thank you for your speedy service on our furnace. Job well done.

    Scott & Kari

  • Thank you very much. Everyone did a superb job and was very pleasant to have around.


  • Thank you for the speedy service, you guys are amazing!


  • Thank you for your prompt and efficient service.


  • The central air at home is wonderful! Thanks for a job well done!

    Loren & Judy

  • Thanks Penny! Your company was very accommodating and easy to work with long distance.
    We appreciate all you did!


  • Thank you.It’s a pleasure having your reliable service.


  • Brian gave me his cell phone number in case my EAA renters had problems with the AC. Above and beyond service! Just wanted to let you know how good he is.


  • We were very impressed with Brian’s work, conscientiousness and promptness. He was very polite also. It’s nice to be the recipient of such great service.


  • My husband was hunting and my hot water heater went out. I called Gartman and they were able to come the same day and replace the hot water heater. Very pleasant to deal with and never made me feel like it was a problem for them to come out and help me, especially on a Saturday. I will forever use their services.


  • A young gentleman came over and did a great job cleaning the boiler and checking the performance. If you have a bunch of young men like that your business is poised to do very well going forward. I feel safe, I will be calling you guys again in late spring to check the AC.


  • I just wanted to include a short note to say thank you and express how happy I was with Chad’s service. He was extremely nice and reassuring and made a stressful situation much easier to deal with. He was also great about explaining what was wrong and what he was doing. Thank you for such great service!


  • I just want to say thank you for the wonderful work you did on my furnace. Your men Jason, Matt, and Chad were great working together and explaining how and why they did the things they did.House is back to being toasty warm again.


  • I really appreciated the great, efficient service on December 31st when Jake O came to “rescue” me from the cold. He did an excellent job and was very polite – he knows furnaces. Also, I appreciate being on your list for Fall maintenance.


  • Thank you, it’s pleasure having your reliable service.


  • On behalf of my wife Patti and myself, we want to let you how happy we were with the service. GMS has done work for us in the past and we have always been very happy with the results. It goes without saying, we will not hesitate to recommend GMS to others looking to update their HVAC systems. Feel free to put our name on the list of happy customers.

    Joe & Patti

  • We greatly appreciate the excellent services you provide to our home warranty holders.


  • Thank you for installing my air conditioner so fast. Your service staff was excellent.


  • It is to late in the day to call, but I wanted to tell you we called to have a furnace worked on at one of our rentals. Not only did the tenant text me to tell me how kind Penny was, he texted me to say how extremely good Tom was. Tom took time to walk our tentant through the new thermostat (I asked to have it installed). Our tentant was so grateful. I wanted to say thank you for everything you and your crew do to help us


  • Thank you for the good work. I love my new furnace, and I will recommed you to others.


  • Good morning Penny.Our A/C stopped working yesteday and Brian was out within the hour to get it running again. He did however, identify that it's not cooling like it should be, so he's going to do some research into it to see how to go about addressing that.Nonetheless, it worked good enough to get through the night. Thanks for the great service from GMS!

    Tim B

  • Thank you so much for your prompt attention to my problem!

    Connie M.

  • Thank you for the prompt service and fair pricing!

    Terry & Carol L.

  • Thank you! Excellent service, great people skills, I will be calling for floor drain in basement and furnace/air check up.

    Alice G.

  • Eric - Thanks! Your work made a world of difference on the 3rd floor. It's warm.


  • Thank you for many years of wonderful service!

    Milda S.

  • Just a short note to tell you how much we appreciate your prompt services. In particular, I would like to single out one of your field representatives. Brian Neubauer has been extremely helpful and conscientious in servicing our church, Trinity Evangelical Lutheran. I cannot say enough about how he goes about his work always looking to save us money and make our systems more efficient. Brian is very easy to work with and tries to help me understand the systems, and because I am not that mechanical that is no easy task. Whatever you pay him you are getting a great deal. I would also say that the entire staff that we have had work on our facility has earned the reputation that your company has achieved. Thank you and we look forward to working with you in the future.

    John W.Buss

  • Thank you Penny! You and Tom have been great and I will keep using Gartman. I understand some of these things can take time to track down. Thank you for your responsiveness.


Gantry 5
520 W. South Park Avenue