Life in Lake St. Louis blends natural beauty with modern convenience—your home’s comfort should reflect that same balance. At Thomas Hoffmann Air Conditioning & Heating, we offer premium heating, cooling, and indoor air quality services to match the lifestyle and expectations of Lake St. Louis residents.
We’re not a big-box brand with a local-sounding name. Our local, family-owned HVAC companybelieves in craftsmanship, service, and doing right by our customers—one home at a time.
Our HVAC Services
Furnace Repair & Installation
Strange furnace noises or uneven heating? We service all major brands and offer repairs or replacements to restore comfort. Energy-efficient upgrades are also available to help lower heating bills.
Air Conditioning Repair & Replacement
If your AC isn’t cooling or cycling too often, we’ll diagnose and fix the issue quickly. We also install complete AC systems tailored to your home. Same-day service is frequently available.
Keep your system running smoothly with a maintenance plan. We offer seasonal checkups to extend system life, prevent breakdowns, and help you stay prepared year-round.
The Thomas Hoffmann Advantage
When you hire an HVAC company in Lake St. Louis, you trust them with your home, your comfort, and your investment. We take that seriously—and it shows in everything we do.
Genuinely Local
We’re not owned by a national brand or backed by private equity. We’re a small business rooted in the St. Louis metro and proud to serve the Lake St. Louis community with integrity and accountability.
Elevated Customer Experience
From white-glove service to prompt, respectful communication, we deliver a level of care that aligns with your expectations and schedule.
Highly Skilled Technicians
Our certified pros are meticulous, respectful, and committed to doing the job right—no shortcuts, no guesswork.
Solutions Over Sales
We don’t believe in high-pressure tactics or selling what you don’t need. We believe in honest assessments, fair pricing, and long-term value.
HVAC Solutions as Reliable as a Midwestern Sunrise
Whether you enjoy lake views from your back deck or host family in the middle of summer, your HVAC system should support your lifestyle—not interrupt it. From system design to emergency repairs, we’re here to help you stay comfortable in style.
Extremely quick response for appointment and did quick fix for our furnace and heat is working great !
Response from the owner:Thank you for your kind words! We're glad to hear our team was able to respond quickly and get your furnace working great. We appreciate your feedback!
They were timely, polite, professional and they saved us from too much sweating. In a field full of pompous and arrogant technicians, these guys take the time to explain what is wrong and how they are correcting it. Other folks just assume you are incompetent but these folks take the time to educate. Cannot recommend highly enough.
Response from the owner:Thank you for your kind words! We truly appreciate your feedback and are glad we could provide you with a positive experience.
I would like to have a receipt for my payment which I did not receive. On a positive note he was very punctual very early actually he did his job and was very professional and I'm hoping and praying this took care of the issue thank you and I would not hesitate at this time to use your services
Response from the owner:Thank you, Mark, for your feedback and for highlighting the punctuality and professionalism of our team; we appreciate your support and will ensure you receive your receipt promptly.
Our experience with them was fantastic all the way through! Not only were they able to get to our business that day but the customer service from the phone call to the on-site service was professional and quick. We'll definitely be using Thomas Hoffmann Air Conditioning and Heating in the future.
Response from the owner:Thank you, Michelle, for your wonderful feedback! We're glad to hear about your fantastic experience and appreciate your kind words about our team's professionalism. We look forward to serving you again in the future!
I couldn’t be happier with the service from Thomas Hoffmann Air-Conditioning! From the moment I called, the team was professional, responsive, and truly knowledgeable. Thomas personally made sure everything was handled with great attention to detail. The installation was smooth, efficient, and the quality of the work exceeded my expectations. It’s rare to find a company that is both skilled and genuinely cares about their customers. I highly recommend Thomas Hoffmann Air-Conditioning to anyone looking for honest, reliable, and top-notch service. They’ve definitely earned a loyal customer!
Response from the owner:Thank you, Rick, for your kind words and for recognizing our team's hard work; we're grateful for your support and thrilled to have earned your loyalty!
Amazing service from Thomas Hoffmann! They made space in their schedule to come out the next day to fix our air conditioner. They were on time, honest and fixed the problem on the spot. Thank you!
Response from the owner:Thank you, Ashley! We appreciate your kind words about our team's service – it's great to hear we could help you so quickly.
Fast efficient service. Both of the gentlemen that came to my home were very help and informative not to mention polite. It’s difficult to get service advisers to appear at your home when scheduled most times they’re late or don’t show up at all. Not an issue with this team on time, clear diagnosis, quick repair. I would definitely use Thomas Hoffmann Air Conditioning again. I recommend them highly.
Response from the owner:Thank you, Anna, for your wonderful feedback! We're glad to hear that our team provided you with timely and helpful service, and we appreciate your high recommendation.
First visit for my maintenance program. Arrived on time. Very polite to talk to. They discussed what they did and everything was good. They were professional. I would recommend this company to everyone.
Response from the owner:We're delighted to hear about your positive first visit experience with us! Thank you for recommending our services.
Very knowledgeable. Very professional. Tom was very thorough and finally confirmed the issues in the system that no one else bothered to check.
Response from the owner:Thank you, David, for your kind words; it's great to hear that Tom's thoroughness made a difference in addressing the issues in the system. We look forward to working with you in the future!
I’ve been using “THOMAS Hoffmann Airconditioning and Heating” for years now. We have a 30 +\- year old system that works perfectly for us. Although we’ve not had to use it yet, it is comforting to know they offer a 24 hour on call service. I really appreciate that the technicians don’t try to upsell us on anything. They’re a very professional, knowledgeable, and courteous, local-family owned and operated business. I’ve also found their pricing to be very fair and by”fair” I don’t mean “cheap” but reasonable… especially for the quality of service provided by THOMAS Hoffmann HVAC. I love supporting smaller family owned business and this one is top-notch! Thank you guys!
Response from the owner:Thank you so much for your continued support and kind words, Mari! We truly appreciate your loyalty and are glad to hear about your positive experiences with our services. We look forward to continuing to provide you with top-notch service in the future.
Great customer service & experience for our HVAC System! They installed two UV lights and a dehumidifier. On time, great service, the new items work great - Great HVAC Service in St. Louis! Thank you!
Response from the owner:Thank you, Brandon, for your wonderful feedback! We're glad to hear that you had a great experience with your installations Your satisfaction is our priority!
Thank you Thomas Hoffman Air Conditioning for doing a great of repairing our HVAC system that was damaged during a power outage. You installed our new HVAC system late last year and promptly responded to our call for repair after a power surge impacted our subdivision.
Response from the owner:Thank you, Don, for your kind words! We're glad to hear that Thomas Hoffman Air Conditioning was able to assist you so quickly after the power surge and that you're satisfied with your new HVAC system. Your support means a lot to us!
This company is so responsive that I love them. They respond immediately, and I trust them to tell me what needs to be done. I haven’t been steered wrong yet. They are genuinely nice to work with and honest. I use their maintenance program which I highly recommend.
Response from the owner:Thank you for your kind words, we truly appreciate your trust in us and are glad to hear about your positive experience with our services.
Quick response and did a great job. On a Saturday.
Response from the owner:Thank you, Scott! We're glad to hear you appreciated the quick response and great service, especially on a Saturday. We look forward to continue serving you.
As owner of rental and living out of town, it is very easy and painless to have Thomas Hoffman schedule all of my seasonal work with the tenant. Highly recommend!
Response from the owner:Thank you for trusting us with your rental property maintenance, Dan! We appreciate your recommendation!
Just had our annual service on our A/C. The technician, Giovanni, was very professional, friendly, thorough and spent time explaining what all he did and what his findings were. Couldn't be happier. I HIGHLY RECOMMEND THOMAS HOFFMAN AIR CONDITIONING AND HEATING.
Response from the owner:Terry, we're so grateful for your kind words and for recommending us! We're thrilled to hear that you had a positive experience with our technician during your annual furnace service. Thank you for choosing Thomas Hoffman Air Conditioning and Heating!
I called on December 25th at midnight and started leaving a message and Thomas Hoffman the owner called me back almost immediately. He said he would come out the next morning between 8:00 and 10:00 am snd he was promptly on time. He fixed my problem and while he was there I decided to get an estimate for a new furnace and air conditioning unit. The price was very reasonable and the installers one of them being his son were both very professional very courteous, polite, arrived on time and finished the same day. I enjoy knowing that I now have the support of Thomas Hoffman heating and air conditioning along with the peace of mind that comes with owning a Trane. Nothing stops a Trane.
Albert Koesterer
Response from the owner:Albert thanks so much for your kind reviews and your business. We truly appreciate it!!!
I made another service call years after my last review. Once again, Tom did not disappoint. He identified the cause of my newly purchased system installed by another HVAC company. He explained it so simple and easy to understand without the technical jargons. I just wished I had purchased the new equipment from Tom instead of saving a few hundred dollars from his competition.
Response from the owner:Thank you, J, for your kind words! We're glad to hear that Tom was able to assist you so effectively and make everything easy to understand. We appreciate your continued trust in our services and hope to help you again in the future!
I've used these guys twice now and their response time is great, they are friendly, informative, and most importantly, effective. I'm calling these folks every time my furnace sounds weird.
Response from the owner:Thank you for the wonderful feedback, Greg! We're glad to hear that you've had such positive experiences with our team. Providing timely and effective service is our priority, and we're here whenever you need us. Looking forward to assisting you again!
Nick was on he way to our house when I had to cancel my appointment for service. Nick was very understanding and professional about it. While we didn't get to utilize him, I have no doubt he'd have been just as professional in his job.
Response from the owner:Thank you for your kind words. We appreciate your understanding and are glad to hear that Nick made a positive impression. If you ever need our services in the future, don't hesitate to reach out.
I couldn’t be happier with Thomas Hoffman. They are quick, courteous, and super knowledgeable as well as providing service at a good value. Most importantly to me, they have great integrity. I could not recommend them more highly!
Response from the owner:Thank you for your wonderful review, Josh and Nikki! We’re thrilled to hear that you had such a positive experience with our team. Providing quick, courteous, and knowledgeable service is our priority, and we're glad to know that our efforts resonate with our customers. Your recommendation means a lot to us!
Tom was a great service technician- arrived promptly on time - and fixed our issue within a few minutes!! Very nice guy too!
Response from the owner:Thank you for the wonderful feedback! We're glad to hear that Tom provided prompt and effective service. Our team strives to deliver a great experience, and it's fantastic to know that you were satisfied. If you need any assistance in the future, don't hesitate to reach out!
Very prompt and friendly service. Will definitely call them again.
Response from the owner:Thank you for the positive feedback! We're glad to hear that you were pleased with our prompt and friendly service. We look forward to assisting you again in the future!
Tom Hoffmann has been servicing both our residential and commercial equipment for several years. Tom is an experienced, innovative engineer, he can troubleshoot and solve any problem that arises. He has even personally serviced our furnace on a holiday! The trust, communication, knowledge, and relationship we have built is why we choose Tom Hoffmann every time, and highly recommend him to all our colleagues
Response from the owner:Thank you, Dan, for your wonderful review and for highlighting Tom's dedication and expertise; we're grateful for your trust and support over the years!
24/7 Service Call Now
At Thomas Hoffmann Air Conditioning & Heating, we pride ourselves on being a locally owned and operated HVAC company. With more than 30 years of experience and a master technician and mechanical engineer as our owner, we can replace, repair, and maintain your business or home’s HVAC system.
