Used Denmark for our city HVAC inspection and to get a furnace humidifier replaced. Both experiences were fantastic. They fit us in very quickly and we’re very transparent about pricing and timeframes of the work. Techs were right on time & very knowledgeable. I would recommend them to anyone in the area that need hvac help.

This is the furnace company to call ! They came early. More important they are professional and I have called them when I needed to 15 plus years. Outstanding staff in office and these gentlemen Always are the best ! For those concerned they do wear masks but better yet they know what they are doing . Excellent

Gary was on time, diagnosed and fixed the problem. I was able to get an appointment right away, and they were able to fix it the same day. The price seemed reasonable, service charge ($65) plus hourly rate ($105 for 1 1/2 hours), plus parts ($65). The technician (Gary) had to go get the right part, so if you know what needs to be replaced buying it yourself might save money. I really appreciated that Gary did not seem to mind me watching what he was doing or my gas boiler questions.

I am very happy with Denmark. Everyone was courteous and helpful from start to finish. I went in with some questions after my a.c. stopped working recently, and the owner even came over to explain things to me. The technician, Gary, was prompt and thorough. I was also pleasantly surprised with the price I was charged. I will definitely use and recommend them for any heating and/or cooling needs in the future.

The heat went down at our office, Denmark came out the same day but found a part was broken. The office manager Allison called multiple suppliers and then drove to Sterling Heights to pick it up. Gus the technician did a great job and kept us informed throughout the process.

Everyone at Demark from the guys that quoted the job, the office staff and the installers were awesom ! They were always on time very mindul of the home and yard. The office staff stayed in touch with me during the process, made sure we got our rebates and inspections. would reccoment this team for all your heating and cooling needs! Dawn

Have had a great experience with this company to this point. Had to have the furnace replaced. They gave us the best price we could find around here and helped us get a rebate through the energy company after everything was installed. Very friendly and helpful.

Helped getting a part for our a/c. 30 hours after it being ordered.