Very prompt and professional ! I have recommended Thielmann for real estate transactions as well…read moreas my personal residence. My "go to" HVAC company for quality service !

Our experience was a good one. We requested a quote came out the same week. We received the quote…read morewith furnace and air options the next day. We scheduled an appointment for 2 weeks later. Installers showed up on time and worked efficiently and had both units installed in about 6 hours. We were very happy with the knowledge, helpfulness and friendliness of the crew. All equipment is working as it should. I would recommend.

I just really appreciated what seems like an honest assessment. I was looking for a second opinion,…read morebecause two other companies had recommended major, costly repairs or replacement for my gas furnace. The Grenz folks came, carefully looked at the unit, and said, "If it were my furnace, I wouldn't do anything. It is running the way it's supposed to." This second opinion cost me something, naturally, but it also saved me between $5,500 and $19,500 (two quotes from the other two companies). Jim seems like a straight shooter. I'd recommend you give these folks a try.

He called me back and talked me through the fix. He did not wait to come out and wouldn't take any…read morepayment for his assistance. He clearly knew what he was doing. He was able to talk me through several troubleshooting exercises without seeing the gas fireplace itself. If I have any HVAC or fireplace needs in the future, I will definitely use Grenz

Had a frozen pipe and couldn't figure out where. Called and had service in about an hour! Tech…read moreBalen was SUPER helpful and gave me tips to help prevent it happening again. 100% will call again for any plumbing needs.

Their technicians - for the most part - are good. However, their prices are way too high, and their…read morecustomer service stinks. It takes 5 phone calls to get anything done because all I get is the stupid AI rep who can't solve any problems. I've heard they've been bought out by a national company in the past year, and changed a lot over to AI. I don't think they are locally owned anymore. I'm wondering if they are not hiring people to answer phones (or worse - letting people go) because all I get is the AI rep.

Very knowledgeable serviceman who answered all of our questions. Very professional yet with a…read morepersonal touch. Was truly interested in our specific concerns and questions. Did not take long to arrange an appointment. Offered suggestions on best way to set and regulate our furnace. After many years with another company that we've learned to distrust, a change was necessary and Donovan & Jorgensen definitely left us with a very good impression.

Just wanted a ballpark quote on my boiler that's working but acting up. To start they demand info…read morelike address and a phone number straight out the gate, I'm sure it's so they can harass me later with "do you still need" calls a week from now and when you give it you find out they charge $100 just for a diagnosis. Don't waist your time They clearly don't want the business.

i had a great experience thanks to technician Jose Rivera. Friendly, knowledgeable and patient…read more Took the time to explain things to me and answered all my question. Did a wonderful job from start to finish.

Joe is so thorough and professional, explains things simply, and answers all questions…read moreknowledgeably. I don't think I've ever dealt a service tech as kind and respectful. Before the appointment, I was hoping that he'd be "my" tech. We did discuss a possible add on for air quality, and he left information about it to review.

Didn't get to use his services - his time frames did not work for my project... however his honesty…read moreand knowledge of information was outstanding. His ability to communicate honesty was very appreciated and should I work in the area again I would contact him first!

From the owner: 10+ years of experience in heating & cooling system repairs and installation for Residential,…read moreCommercial & Industrial.

Clearly the worst experience with a company I had. Vinny came out to check out my ice maker and…read moredetermined the unit needed to be replaced. the part was ordered and he set up an appointment for 1:00 the following Friday. Friday came and went he did not show up or communicate that he as not coming. I reached out to him to get an update and finally got in touch with him on Monday. I was told the part did not come in and he would let me know when it did. He came yesterday to install the part, today I called him to say the until still was not working, and he offered to come out tomorrow to see what was wrong. i was not happy about it but said that will have to do, that's when he got very belligerent and started swearing and screaming at me that somehow his lack of communication was my fault. I now have to call another company to fix what he couldn't. think twice about using him

My refrigerator quit working over the weekend. I called numerous places, but none of them could…read moresend someone until the end of the week to look at it. Plus, they all wanted to charge me a couple hundred dollars, which did not include any repairs. Thankfully, Vinny's could come out on Monday morning, which was appreciated. He looked at my fridge and diagnosed it as a faulty defroster causing the issue. He ordered the part and was able to install it the following day, and everything was working by the end of the installation. However, when I came home from work later that day, I found that my fridge was again no longer working. I sent them a message, and they could come out the next day to take a look. When he came out, we discovered the electrical panel was the issue. He explained that when the electrical panel fails, even after it is repaired, other issues tend to follow, requiring additional repairs over time. He took the time to explain this thoroughly, answered my questions, and gave me the option to repair the electrical panel or get a new fridge. I appreciated that he took the time to explain everything so I could make an informed decision. Ultimately, I chose to replace the refrigerator, and they changed their initial visit from a repair to a diagnostic visit and refunded me the difference. I recommend Vinny's if you need an appliance repair. They're very responsive and honest, and the pricing is fair.

Have used this company many times, but NEVER again…read more They literally charged us $465 to unplug a drain. This was about an hour's worth of work, not counting the time they spent going back to their service center because they didn't bring the necessary equipment. Avoid unless you want to get ripped off.

Scott did an excellent job installing my new A/C. I also had Horsch & Miller install a new hot…read morewater heater in my home and again another excellent job. They are do a very through job and are reasonably priced. I would highly recommend them!

I needed to have a completely new central air unit installed. There were vehicle complications,…read morehowever, they were still determined to get it handled. They checked on the unit two weeks after the install. Their quote was cheaper than others I called. I'd like to personally thank Briar and Alex for all their help and patience.

Very disappointed messaged them many times to get my central air units up and running for 2026…read morecause they put them in 2025 but couldn't finish the job due to electric issues but that all should have been checked out prior to even talking about central air units. Now I have hire another company to get my units up in running. Plus hire a lawyer for them not finishing what they started. Very disappointed.