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Smith & Willis Heating & Air Conditioning
We at Smith & Willis Heating & Air Conditioning, LLC, are committed to comfort. We serve Castle Rock, Longmont, Denver, Commerce City and the surrounding areas, providing premier heating and cooling installation services. Our HVAC company specializes in designing, engineering, and installing personalized complete comfort systems.

We are dedicated to delivering you the best HVAC products and the finest, most professional service and workmanship. We take our responsibility very seriously when you place your trust in us. Our pledge is to always tell you up front the cost will be to complete your job correctly. We make it a point to go over any details or limitations of the proposed system that will affect your enjoyment of the end result.

You are told exactly what to expect up front. We back this philosophy with our exclusive written guarantee when choosing Smith & Willis Heating & Air Conditioning, LLC. to contract your job. We take pleasure in being your #1 source when it comes to Denver Metro Area heating and cooling companies.
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To accomplish our mission, a foundation of core values was developed, agreed upon, and implemented by the Smith & Willis Heating & Air team. Smith & Willis Heating & Air Conditioning, LLC. is a customer focused heating and air-conditioning company that was originally started in 2002. Located in the Denver area, we employ highly trained people whose goal is to make our company the best HVAC company in the Denver Metro area.
With Denver having a sporadic climate, you must always be prepared for all kinds of weather. No matter what the forecast has in store, you'll be ready with Smith & Willis. Our heating and air conditioning services are the best in the Greater Denver area. Whether you need a new air conditioner for those sweaty summers or you're looking for a new furnace to help keep cozy during the winter, we have the experts to keep you comfortable all year long.
When your old furnace or heat pump just can't handle the Colorado winter anymore, get in touch with the experts at Smith & Willis! We're Commerce City's trusted furnace replacement contractor. No other heating company in the area is better qualified for your next heating installation project.
Life in Colorado is pretty good thanks to our front-row view of mother nature. Still, the climate here is unpredictable at times and this means that you need to always be prepared. One day we can have snow falling from the sky and the next day we can experience a wave of heat. In order to stay cool this summer, Smith & Willis can help.
We get it: It's easier to picture the benefits of a state-of-the-art heating and cooling system than it is to imagine how you'll pay for one. That's why we're proud to offer a variety of flexible financing options with approved credit. These days many homeowners are choosing to finance their new furnace or air conditioning systems.
Reviews (20)
Kevin W.
Kevin W.
Apr 01, 2021
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I've had an issue with my HVAC for 2 years and had several well known companies try and fix it to no avail. S&W had it diagnosed and fixed in 15 minutes! Great work.
Suzan K.
Suzan K.
Jul 08, 2020
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Our Heat System was not delivering any heat or air to an entire section of the house. David from Smith and Willis came out and installed a scoop and now that section recieves much better air flow and stays more consistent in temperature with the rest of the home. Summers are more comfortable and winters less cold in the Master Bedroom. David also took his time and explained all the features of the upgraded thermostat that he suggested. David was polite, helpful and professional. Definitely recommend them and be sure to ask for David.
Tedra A.
Tedra A.
Feb 07, 2020
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We have a new build home that Smith & Willis had installed the HVAC system in. I felt like the air in two rooms wasn't getting warm so the builder sent them out to do a CFM test. David and Brody were sent to do the test and they are amazing amazing! Brody let my 4 year old follow him around and watch to "help". David took the time to teach me the features of the thermostat and brought up other things they could install, which is obviously a sales pitch but he did a great job of just telling me the facts and answering my questions. If I need service from Smith & Willis again
Jessica S.
Jessica S.
Aug 19, 2019
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These guys did the work for our builder at our new home. They were less than helpful. Our furnace was off for an entire weekend and the compressor wasn't turning on during our inspection. They told us everything was fine and the inspector was wrong. It was insanely hot out and the AC was pushing ZERO air, but apparently that's fine.
Kristin B.
Kristin B.
Apr 08, 2019
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We just moved into a brand new house and the fan was already malfunctioning day 3. So first the positives, the company was able to make an appointment within 3-4 days of me calling. When the guy showed up he was able to find and fix the issue within five minutes.

The reason why I gave them only two stars is because when he was cleaning out the fan, apparently he just dumped a bunch of drywall and bugs into our toilet AND left it there! We had a guest come over an hour later and it was extremely embarrassing when they said "ummm you have bugs in your toilet". How hard is it to first
Eric T.
Eric T.
Dec 11, 2018
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Their work is completely garbage, got a new home from Lennar and every night I hear popping noise from the HVAC system. They have tried to fix it like 5 times and every time they fail, now they're saying it's perfectly normal. Even their own tech that came out said there's probably a tear or something jacked up with the system and told me to call a duct cleaning company and see if they can send a camera to look for tears. Wouldn't trust them near any furnace. Potential customers BEWARE
Jeremy Y.
Jeremy Y.
Jun 14, 2018
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Had my new furnace/AC installed in by Smith & Willis in November of 2014, and have subsequently had my Freon refilled twice since then. After the second refill, I called them up and was surprised to hear that their warranty department would no longer exist. I am currently faced with a window A/C unit as a short-term fix, but that is on its last legs. I wish the warranty department still existed with Smith & Willis so I could save some $$ in getting this addressed. Be very careful if you need warranty work done on your new install. Smith & Willis may not honor it.
Scott T.
Scott T.
May 25, 2017
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SO...Driving on Titan Road last week a van driver of theirs decided he would drive right behind me when I was going the speed limit through a new construction zone. 10 MPH is the limit and I'd imagine he knows how my bumper smells, he was so close. Once I got through the construction zone - ZOOOOM goes the van around me on a double yellow. I called the number on the van to complain and no one returned my call. Guess there was a serious plumbing problem in the area for the driver!... If they drive like that, I can't imagine them in my home. ***Update: Had a follow up call with Catherine
G. W.
G. W.
Mar 02, 2017
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I had troubles with my new home. After some explaining we now understand that the building and energy codes are why we are forced into having to use our smaller system differently than our other homes. Great company we are grateful they helped us understand our new system and how to use it.
Kay J.
Kay J.
Dec 14, 2016
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Ask for Monty! He was a great and knew what to do to fix the issues. I am so glad that Smith & Willis sent this gentleman because he took great professional care with our problem and made certain all was working properly and to optimum levels before he left. Very pleased customer from Leyden Rock, Arvada! Thank you Monty!!!
Kitty H.
Kitty H.
Aug 22, 2016
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I called to book a service call and was told to call someone else (really) because my builder warranty has expired and the wait time for a non-builder-warranty appointment is 5-6 weeks. Someone from Blue Sky is coming out tomorrow. If Smith and Willis is this backed up with builder warranty work it makes me wonder about the quality of their installations.
Felecia D.
Felecia D.
Aug 09, 2016
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I can't speak highly enough of Smith & Willis. They go out of their way to ensure a job is completed correctly and professionally. I had a ductless split AC unit recently installed in a historical building that was over 114 years old. We ran into a few problems due to the nature of the building structure but the company went out of its way to make sure everything was just right with the instal. My hat is off to the fabulous work from Chris Stibbs and his son. They do fantastic work. Also a special thanks to Jim, Jacob and Chris Dolif. I highly recommend Smith & Willis for your
Sue G.
Sue G.
Aug 04, 2016
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New construction installation was faulty. They were out first summer and filled the unit with refrigerant and called it fixed. This second summer when it is no longer under warranty they could not be here for 3 weeks and would charge a service charge and an hourly rate. When I hired another company and they found the faulty installation issue and fixed it I sent Smith and Willis the bill. The owner determined he would not reimburse any part of it. Do not consider working with an owner and a company that treats customers so poorly. Owner, would you have asked a member of your family to sleep
Matt L.
Matt L.
Jul 10, 2016
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Called on 7/1/16. to make an appt. to have my humidifier repaired and I was told by the girl answering the phone that the scheduler would call me back because she was not at her desk. It's now July 10 and still have not been called to schedule my appointment. Again another example of a poor customer experience.
Jared L.
Jared L.
Jun 30, 2016
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I want to thank Anthony and David for taking the time to show me what customer satisfaction is about! They took the time to inspect both my units, set them properly and explain what they did and the levels of freon put into my system. They walked around and made sure my vents were all blowing properly and I appreciate that. They were very courteous to myself and to my kids and that is very important to me. Thanks again.
Brent B.
Brent B.
Jun 08, 2016
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Be very careful with these guys. My system is just over a year old. It was admittedly installed incorrectly, and when they came to fix it, it was STILL incorrectly done... however now that the season is changed and we noticed that it was still not corrected, they wanted to charge us for a visit. Our house is uncomfortable and our LEED certified house wastes energy and now our electric bill is doubled!

I read this on several occasions on new builds.

Very friendly on the phone, but be warned. Good luck!
Jason K.
Jason K.
Jun 03, 2016
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New construction installation. Refrigerant leaked due to poor installation. Naturally discovered on a Friday when unit was first turned on for the hottest weekend of the year. Warrantable work considered "non-emergency" on a brand new install. 4 day lead time on repair. Poor customer service. Wouldn't allow options for another company to fix and in fact threatened they would void warranty!

That sums it up... We will see if they can fix it

Smith and Willis is just another company all about the $$$ and not about customer satisfaction. Their website says honesty and integrity is
Trent E.
Trent E.
Aug 16, 2015
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Terrible Experience - Don't buy from this place.

We purchased a large house with a 6 Zone AC system in the Columbine area of Littleton. Our air conditioner went out and not knowing anyone else, I ended up contacting Smith & Willis.

They came out and replaced the existing unit with a new air conditioner and for months afterward we had nothing but problems with lack of ability to cool our house and frequent freeze ups. After multiple visits and issues, I ended up contacting a couple other AC businesses and inquiring about the problems. I was told repeatedly that anyone in the AC business
Jason L.
Jason L.
Jul 19, 2015
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They installed the HVAC on our new build house. We have two units. These guys have been AWESOME!!! When I purchased the house, the air conditioning units were too far away from the house, and with new homes, there isn't much space. They moved both units closer to the house even though they weren't obligated to.

I also had a huge problem with the upstairs HVAC freezing over. This happened several times. They came out, charged the A/C and dorked with some other things. This happened about three times. Finally, this summer, just out of warranty (this problem was reported in warranty though
Mark S.
Mark S.
Jul 01, 2014
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The worst service ever.

I needed a certification on my furnace in a home less than two years old it took two weeks to get a tech out to the house one week before closing. The tech called me down stairs and said put your hand on this fan motor it was warm it is burnt out you need to replace it. Keep in mind that the furnace is 18 months old and I have replace filter every month. So I told the tech this has to be done in the next five days he side ok. Eight days later 270.00 for a certification I don't have when I call the office they tell me the tic is not closed and they don't know