Sigman doesn't care about you or the work they perform in your home! I've called and spoke to two…read moredifferent gentlemen, catching both of them in lies in regards to my furnace's warranty. They just don't care. All my paperwork says I have a 10 year warranty and they won't honor it. I'll attach photos, please beware using Sigman. They are not good people and won't stand behind their own work

Imagine enjoying Christmas Day with your family all day and you notice that the house seems too…read morecool at bedtime. With the thermostat set at 71F, the inside temperature had dropped to 66F with the furnace apparently running. We went to bed and called Sigman first thing in the morning...now the temperature was at 62F with the furnace still running! Sigman sent Sam out who was courteous and professional. He diagnosed the problem as a clogged condensation line. He disconnected three lines and blew them out and we were back in business in roughly 30 minutes. Fast, clean, affordable, and professional! We have our HVAC under contract for seasonal maintenance and have that done twice a year. We would definitely recommend them.

Great experience, received a quote in one day, came out and installed a new air conditioner and…read morefurnace two days later. Mark, Brad and Tyler were professional and explained everything about my new units and did a fantastic clean up. I have already recommended them to another family member. Five stars, thanks for getting us cool again.

Our 18 year old air conditioner died at the end of spring, Merten's responded to us very quickly…read moreand came out with a very competitive quote for a new HVAC system. Upon walking through our 115 year old home they also provided good recommendations on home improvements we could make to increase the efficiency of our system. On installation day they were on time and very respectful of our home, and were always very friendly. Highly recommended

No call no show for scheduled appointment…read more Whereas I understand things do not always go as planned; with businesses like this a simple "heads-up" phone call or email should be standard. When a client has allotted time for service and no one shows up or has the courtesy to call it tells you everything you need to know about the product & business overall. Unprofessional, unreliable.

Pricing was very expensive. The worker that showed up was rude and condescending. He talked to me…read moreand my daughter like we were a huge inconvenience to him. He came back to fix a gas leaked he did the previous day and change the hookup on washer and dryer. He put hot on cold and cold on hot. He thought I was crazy and said they were correct, until I pointed out the H and the C on the back of the washer. I wanted him to look at other things and he got real defensive and said he wasn't paid to do those things. I said, well can you look at them? I've never been treated so badly. I had to tell him to leave and not come back.Horrible company. will not use again or recommend. Unfortunately, it did not get his name.

If we could give Ehret a higher rating, we would because this company is reliable, honest,…read morethorough, and very helpful. We actually have been using them for quite a few years now, and they have never failed to come through for us. If ever we encountered a difficulty, they "bent over backwards" to accommodate our request and fix whatever was needed. We don't look elsewhere anymore, whether the job is large or small.

Devin was great. Showed up in the time window, diagnosed the problem, fixed the problem, and didn't…read moretry to up sell us anything. Issue with our A/C

I have to say that this company has amazing people working here. And the owner Kaycee don't mind…read moregetting his hand dirty to get the job done. His workers have no bad words to say about him or his company. And what I really like is they don't have you waiting all day they give you a time and they are on time if not they will call and let you know. I have nothing but good comments about this company I recommend everyone to use XCELL Williams.

Friendly & thorough. They have been our go-to source for both our home and commercial office…read morebuilding we own. Don't look anywhere else for HVAC service or installation. Williams is THE BEST IN STL.

Full disclosure, I called Degenhardt for a bid, and I was astounded with their honesty, and being…read moreupfront. Bottom line, I have an older unit that needed a repair/replace and they set me on the right path. Degenhardt gave me the facts that I needed, and I will call them again. I recently repaired a furnace, and it needed a subsequent repair. Degenhardt recommended the repair, and recommended I use the previous service provider to maximize warranty. He also noted considerations when I decide to replace, which all made sense. I can turn a wrench, and I have serviced my HVAC in the past, but Degenhardt is next level. Dan clearly is well-informed on the practice and science of HVAC as evidenced by his assessment, recommendation, and the fact that I am in a nice cool house again. TL;DR: Hot AF STL in Aug. Paid another contractor to fix the AC fan, broke again. Degenhardt recommended a fix, I trust them, way less sweaty. Call them again no hesitation.

My a/c went out on Thursday, 9/10. I called Degenhardt because two of their young employees said…read moreit was a great company. (I met these men at Ted Drewes after their work hours while my friend and I were getting concretes.) I called the company on Thursday. They sent a repairman on Friday morning. Jim, the repairman, checked out the a/c unit completely and said that the compressor was no longer working. He checked to see if it was still under warranty. It wasn't. He gave me quotes for repair and for replacement. I chose to replace. Monday 9/14, the men arrived to replace the unit. They called about 30 minutes ahead of time to let me know they were on their way. That was great! When they arrived, they told me what was going to happen. Dante did the sheet metal work while Jim did the a/c tower. They were pleasant, friendly, respectful, and efficient. They treated my home like it was their home by cleaning up any messes they made while doing the install. I was particularly impressed with their tidiness and their information. Well Done, Degenhardt Heating and Cooling! I will call you for future service.

Called three different places as my HVAC shut down, left a message with all three, HCS had a call…read moreservice. With in 45 minutes they called me. The other two have yet to return my call. 30 minutes later at my door total cost repair was $200 took an hour, $120 to show up. When he got it running he then inspected the system for a cause, fixed that as well. He answered my question. Offered to cut the cost if I paid cash. I had cash so I paid it. Very good service you pay for what you get. HCS fixed my HVAC same day I called.

The response time that I received during a furnace breakdown on a Saturday (considered an Emergency…read moreCall) was second to none. However, if this happens to you, be prepared to pay premium dollar for the service. It was $120.00 just to show up, whether it be 5 minutes or 60. Any time-charge beyond the first hour will also be formulated at $120.00/hr. In my case, one issue was the replacement of an Automatic Condensate Removal Pump. I was charged $120.00 for the pump and an additional $20.00 for the removal and replace. After the job was completed and the technician was on his way, I decided to do a little price comparing of the pump, on the internet. I soon realized that the average cost of the same pump was priced out at around $40.00 at most of the big-box stores. It's bad enough to pay an extreme, high dollar rate for the service, but to get hosed on the cost of the pump...Well, as the old proverb goes, "Fool me once, shame on you, fool me twice..." Anyway, you get my drift. Consumer beware.

We asked for an estimate on installation of a water softener and an RO system. Turns out a water…read moresoftener is not possible with our setup but RO system is. After a week, never received an estimate. Contacted the office via email and called the plumber who came for the estimate, leaving a voice message. Crickets. If you don't want the work just say so, don't waste my time.

Chase assessed and solved the problem very quickly. He was friendly, and the price was fair. Highly…read morerecommended.