TDH Mechanical, Heating and Cooling Contractors — St. Charles

“Absolute professionals.”

Absolute professionals! TDH went out of there way to take care of us when our furnace died in the dead of winter. Reasonably priced and very knowledgeable technicians. Wally was terrific, answered all my questions and left everything nice and clean. Highly recommend!!

Jim Jans

Feb 2025

“TDH did an installation of 6 ductless air handlers for an office.”

TDH did an installation of 6 ductless air handlers for an office. They were very efficient and worked around our office availability to get the work completed on time and at a reasonable price.Excellent communication and tidiness throughout the project were above expectations and appreciated. Wally and his crew were on time and easy to work with. Would highly recommend them for professional quality work and craftsmanship.

Julie Weingarz

Sep 2024

“TDH Mechanical did an outstanding job on the replacement of our furnace and AC systems.”

TDH Mechanical did an outstanding job on the replacement of our furnace and AC systems. Tim (owner) came out quickly to review the job and gave us a competitive price for a complete replacement. His installation crew are true HVAC craftsmen. The quality of their work is outstanding!

Kris Dahl

Jul 2024

“Called TDH and it was a pleasure dealing with Wally.”

Called TDH and it was a pleasure dealing with Wally. We received quotes from other companies just to receive the same old story from every salesman. Wally came out, was incredibly knowledgeable and was also onsite for the install to ensure everything was done correctly. He was not just a sales guy. He’s part of the install team and I appreciated that. Our friends have used their services multiple times and we will too!

Adam Wilk

May 2024

“Phone access to the owner.”

Phone access to the owner. Same day estimate. Fair pricing (I had other estimates, theirs was significantly lower). None of the over-selling pressure so common in HVAC. No deposit required, perhaps because I'd used them for a similar job 13 years earlier in a different home. Easy scheduling for install of A/C. Early arrival. All requests met or exceeded. Safety inspection of furnace which did not need replacement. Great at handling my questions. New A/C worked correctly the first time. Actually a pleasant experience. Paid securely by credit card at the end of the job. Tim (owner), Wally (estimator and lead installer), Jesus, Reuben, and Jackie (scheduling) know what they are doing and treated us with respect and good humor. TDH Mechanical, Inc people are first class in every way.

Ken Graham

Apr 2024

“Updated: TDH Mechanical installed a tankless water heater today.”

Updated: TDH Mechanical installed a tankless water heater today. It was a big job (they had to remove two old heaters and an old water softener system), but they did it, and it works great! As with the prior job that I hired them for (furnace, etc.) they cleaned up when they finished. Previous: TDH Mechanical did a fantastic job installing a new furnace, AC unit, whole house humidifier and Nest thermostat. They also cleaned all the ducts. Their price was more than reasonable, in fact it came in below other quotes.. those other quotes that had inferior equipment. They arrived on time, got the job done exactly as promised, and cleaned up before they left. I highly recommend them.

David Kaplan

Mar 2024

“Very responsive & dependable.”

Very responsive & dependable. Had 2 furnaces simultaneously installed in my home on same day. The 2 technicians were very efficient. They were very tidy. They had covered their entire indoor walkway area and stairs with canvas tarps, hauled away both units and swept up everything including the driveway. They had also previously installed an AC unit a few years ago in my prior home, and also did a great job. They will also soon be installing a new furnace and AC unit, new ducting etc, this spring in another property of mine. Highly recommended!

Peter Calabrese

Jan 2024

“TDH folks are great and pros in the HVAC services they offer.”

TDH folks are great and pros in the HVAC services they offer. Rolando was great, he came and serviced our AC condenser unit, and also addressed the inducer motor sound issues in the furnace unit, and their back office scheduled a follow up visit to replace the part. My experience with their team has been positive and I recommend that you try them as well.

Sirish Capoor

Jun 2023

“They cleaned my AC unit after another firm I had called left my unit dirty even though I had called...”

They cleaned my AC unit after another firm I had called left my unit dirty even though I had called for a AC cleaning and spring checkup. The other firm's technician claimed I had multiple things wrong with my unit and I needed to shell out a minimum of $600. And he then kept going by telling me I should get a package deal which guarantees certain things for $1600. I said no thanks and told him I'd be calling the firm that installed my unit. He then told me they aren't really supposed to clean a defective AC unit and he wasn't kidding as he did a terrible job of it. And this company's policy is that they no longer open the top of an AC unit to clean out all the leafs and debris.

Alan Kaisher

May 2023

“Jorge and Cesar were as professional as they come.”

Jorge and Cesar were as professional as they come. I appreciated that they explained what they were doing as they went through each step replacing the boiler in my home. They provided answers to all my questions and were able to remove my old boiler, install the new one, and get all the radiators bled and working all in one day! Exceptional service. Would recommend to anyone having boiler issues. Thank you!

Reece Conroyd

Mar 2023

“Jose was a great technician.”

Jose was a great technician. He came in at the promised time and did a fantastic job. Before replacing my old furnace with the new Trane model, he cleaned up the space, paid attention to small details - like the way my old PVC pipes were draining from AC unit, and replaced it with new and made the whole area much better to use and helped ensure that for the maintenance of the furnace, water heater and my humidifier all can be accessed easily . Jose thank you for your excellent service and the professional approach. I would strongly recommend TDH to anyone who asks me. Love the no nonsense way of doing business knowing I have 12 years of parts and labor warranty. Thanks again TDH team and special thanks to Jose.

Raghu Srinivasan

Feb 2023