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.

I would like to just say how wonderful this company is. When we talk great customer service which…read moreseems to be rare these days, Josh and his apprentice are of the highest standard. Straight to the point, friendly and makes sure that his quality of work is of the highest standard. Thank you Josh and looking forward to have both HVAC and Furnace serviced in the future.

Josh was prompt, knowledgeable, and friendly. Same day service when our AC and fan stopped working…read more Thankfully it was a quick fix and the price was very reasonable. Definitely will be using again for future heating/cooling issues.

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.

Excellent response time! Great technician, who was very fair and honest with me! Very rare in…read moretoday's world!!

Jason, Brandon, and Adam did a great job installing my furnace. They were all very professional,…read moreknowledgeable, and friendly. The furnace is working great and a huge improvement from what I had, without the huge expense that other companies quoted me. Thank you to Tyler for being so diligent in working with us to get the best price and equipment that fit our space and needs. I would highly recommend this local company for anyone with HVAC needs!

My technician, Greg Ritter, from B and B Heating and Cooling just left. They always send a text of…read morearrival with a picture, which is really nice. He was simply awesome as he inspected the unit inside, thermostat, and the unit outside. He took the time to thoroughly explain in detail with layman's terms while showing the operation of each one and any problems they may have. I really appreciated his expertise, patience, and overall great personality. The service provided was exceptional. B and B is the best and I always recommend them.

A coworker of mine recommended B&E when I told him about an issue with my AC. Bill called me…read moreshortly after and despite a busy day managed to get me scheduled for that day. He came out and quickly found the problem. From being very personable to showing and explaining to me what he was looking while inspecting my heating and ac system, the service provided was exceptional. Best of all, I was honestly shocked at how reasonable the costs were. I cannot recommend B & E Heating and Cooling highly enough. If you need your heating or ac inspected or repaired you need to call Bill at B & E. Thank you Bill, you've earned a lifelong customer and I will be sure to tell my friends and family about you!

They are no longer in Florissant. Their shop is in St. Charles. Extreme parts markup. They charged…read moreme $225 for an outside temperature sensor.

These guys were amazing. During one of our biggest heat waves they were able to get my air…read moreconditioner up and running fast. And I thought that their price was more than fair. I would definitely use them again. They explained everything very clearly and gave a professional estimate that they were able to stay within. I would definitely refer them to others!

When it comes to home HVAC systems (indoor/outdoor) Sean Murnan of Ambient Air is the way to go. He…read morehas great, low & affordable prices on cost effective equipment. That will not only save $$ on your electric and gas bills but will also improve your overall health and well-being. 5/5 stars and thanks for the great work!!! - Corey

I've dealt with a lot of HVAC companies, and this has been the smoothest experience I've ever had…read more I've used Ambient Air three times now for both my own system and a tenant's. I'll never use anyone else.

(I'd give them 100 stars if I could!)…read more We met Jason earlier this year while purchasing a home that needed a total rehab. We were ready for him to replace the entire HVAC system right away, but because of his experience with rehab homes, he advise us to wait until all the dust settled first -- a very smart suggestion. Here's where you really see how much he cares about his customers: Jason told us about upcoming changes in the HVAC industry that would make new units more expensive. He suggested we buy the unit early to lock in the lower price, and he even offered to store it for us until we were ready for installation. Six months later, when we were finally ready, we coordinated everything with Laura, and the timing couldn't have been better. Jason and Cory also handled our whole-house vent cleaning -- and thank goodness we took his advice to do that before installing the new system. His team showed up right on schedule, worked efficiently, and did everything as professionally as possible. The entire experience was smooth from start to finish. Highly recommend -- truly a 100-star service!

Bill Campbell- My Honest Accounting of My Experience My…read moreexperience with this company has become a credibility issue more than anything else. I was told I would receive a text when the technician was on the way -- that never happened. For them, that seems to be "no problem," but for me it meant I had no chance to be present, observe the work, or verify anything firsthand. From there, the story kept changing. I was first told the technician ran the furnace for 10 minutes, then later that he ran it for almost an hour, and now I'm being told it was 48 minutes but they round up. These explanations cannot all be true, and the constant shifting makes it hard to trust what actually happened. When I arrived shortly after the technician left, the furnace was running with no heat, the same intermittent failure pattern I've been dealing with all week. Nothing was diagnosed, nothing was resolved, and the system was left in worse condition than before. When I spoke with the supervisor, I was offered a return visit -- but only if I paid another service fee and hourly rate. The suggestion was that "we can watch the furnace all day," but at my expense. Meanwhile, I was already charged for a full hour even though the technician was reportedly there for 48 minutes. If they're rounding up, it raises the question of whether I'm entitled to the remaining time I paid for. At this point, the pattern feels less like a repair‑focused service and more like a replace‑the-unit operation. When a company can't keep its story straight, doesn't follow through on basic communication, leaves the equipment still failing, and immediately pivots to more charges or the implication that replacement might be the next step, it's hard not to feel like the goal is selling a new furnace rather than fixing the one I have. This is simply my honest experience and how it comes across from my side.