I interviewed many AC / Furnace contractors after our AC went out and the furnace needed to be replaced too; it was on its last leg. I got the recommendation for Controlling Systems through ChatGPT and they didn't disappoint. The sales process best of the bunch. Chris, our sales rep. took the time to do a manual J measurement throughout the house to ensure we were getting the right system for the house, which none of the other contractors even considered. After showing me all the options, we went with their RUUD top of the line system which came with a multi stage furnance, variable stage AC, and a heat pump. They applied the rebates offered by Xcel, so we didn't have to wait for the rebates, we just signed over the rebates to them during the sales process. The installers were top notch, kind, and ensured they took good care of our home. I couldnt be happier and highly recommend them. From a price point, they came out thousands less than the closest competitor, and I'd note the closest competitor wasn't willing to do a transfer of the rebates. We would have had to claim those after the sale. read more

So few companies will even do mini splits, much less demonstrate true expertise in the technology. Rudy and the team designed and installed an excellent system to heat and cool our garage and home office, completed the job ahead of schedule and for $2500 less than my nearest quote. There was a slight deviation from the equipment in the quote and what was installed and I wasn't even worried. Three weeks later I got a call that they had the part and they installed it! Being true to what they commit to, even if I wasn't bothered by it, seems to be their culture. Thanks! read more

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We recently had our heating/cooling system replaced by Controlling Systems and we could not be happier with their service from beginning to end. Chris in sales, who is as nice and responsive as can be, gave us a fair and comprehensive breakdown of our options and all associated rebates. Jimmy and Darin, the installers were friendly, knowledgeable and efficient. Highly recommend! read more

We had a positive experience with Controlling Systems. They changed our old furnace and set up a new AC unit. Ryan promptly provided an estimate and scheduled the installation. Gemini and his team were very professional, explaining everything once the job was completed. Gemini surprised us by playing the piano beautifully, a treat! read more

Controlling Systems - Great job replacing the furnace and installing a new AC unit! - Heating & Air Conditioning/HVAC Near Me - Denver, Colorado

Upgraded our mini split. We now have heating / cooling in our bedrooms. It's more efficient in low temperatures. They also helped us take advantage of several rebates. Professional. Clear Communication. Great Experience. read more

They were on time and had an appointment that would work for the tenants in the house. Good work, and the tenants loved Vincent! Thanks! read more

I can't recommend Controlling Systems highly enough. We hired them to install a mini split heat pump (AC & Heat) system in our 1908 house. This was a pretty big installation with 4 mini splits on the main level and a multi-vented blower system on the upper level. We talked to 4 different groups and got bids before going with Controlling Systems. They were really well priced, but it was their understanding of the technology and what the job was going to entail that put them heads above everyone else. This was a somewhat complicated job with the age of the house. They did an amazing job from evaluation to quoting to installing and follow-up. Chris was great to work with and Rudy went above and beyond to make sure everything looked great as well as worked great. Professional, honest, just really outstanding. You want to talk to these guys! read more

I am so glad I found this company. I have a few rentals with swamp coolers and boilers, and they were able to take care of everything at each property. They worked with my tenants to arrange an appointment, arrived on time and then worked with me for the payment. Their service towards me and my tenants were stellar. I will definitely continue working with them going forward. read more

Our heat pump system was installed by expert professionals who went above and beyond what was required. I have recommended and will continue to recommend Controlling Systems! read more

Easy to work with and timely in their responses and scheduling appointments quickly. Super friendly and informative through the entire process. read more

I cannot recommend Controlling Systems, unfortunately. I got a new furnace and AC unit installed in April 2021, and it wasn't a smooth process; the inspections failed at least twice, and after a month the exterior seal completely melted off. I altered them to a weird sound I started to hear, and they brushed it off. I finally got a different company to come take a look and we found not one but TWO pieces of metal scrap inside of the fan! A small one I could maybe understand, but not the bigger one which measures 3x8 inches! I will not be using them for any future projects. They also mistakingly sent me another customer's invoice which detailed: "Condensation line to unit was not hooked up properly this is why the unit was leaking into the attic there is no visible damage done to the drywall with a little water did come out should dry up by the end of the day." read more

Controlling Systems - Heating & Air Conditioning/HVAC Near Me - Denver, Colorado

These guys are great! Eduardo went above and beyond in the AC service we had today, and thoroughly explained everything he was doing. He took care of everything in great time and is a genuinely nice guy as well. I'd recommend looking into the PCC program they have too. I have found my HVAC company! read more

These guys did a great job getting HVAC installed into my old house. The estimate went smoothly. Ryan noticed issues other HVAC companies did not notice and was timely in getting an estimate to me. Rudy and his team did a fantastic job installing the furnace, AC, and water heater in just one day. They also took care of me by fixing a few additional problems they found in the crawl space. Can't recommend these guys enough! read more

I would recommend Controlling Systems. I received several bids and theirs was the most competitive, so from a value perspective they were great. The install was a bit challenged and took a long time. The head tech Roman, worked a 12+ hour day into the night to try to make sure everything was finished, all while maintaining a friendly customer service positive attitude. The other techs were also great, no complaints. After their work was done we noticed our hot water heater was leaking. I called and got a less than helpful reaction from the receptionist, but then someone called me back (James I believe) and said they'd send someone right over. A supervisor came over and installed two new connections, free of charge. That is the sort of service you hope for when you're spending massive amounts of money on a new HVAC and it was much appreciated! As a side note, we also had them install an automatic (measures outside temperature and adjusta automatically) bypass humidifier. The cost was a drop in the bucket and it's done an excellent job maintaining higher humidity this winter. I recommend adding one of these! read more

I have been working with Controlling Sytems for several years, and am enrolled in their annual Evaporative Cooler and HVAC service. They always do a thorough job, are on time, and pricing is always fair. I plan to continue working with them. read more

I had an AC installed Mid-May, 2022. I have requested the a detailed invoice and the orginal estimate multipal times. I have never recieved it. I was told I never have to do put filters in because they would be out to change the filters every 4 months. I will never have to do repairs. I started reading my docuuments I can't find that anywhere. I was told I would get an Xcel energy rebate after inspections were done. I called the county I cannot get an inspection because ARS NEVER filed the electrical permit. I have call ARS Aurora multipal times left messages because they do not answer there phones. There is an main ARS call center but it is not the local office. They have sent emails, messages and left voice messages over several months. It is now 09/18/2022, I have yet to get my Xcel because I can't get one without the permit they never filed. I didn't know that the Nest thermistat came with the AC install when I said something the service person he went to his truck came back and said oh you didin't pay for it. I found the invoice that are lump sum amounts, but the nest was listed. Yes, I paid for it. So they had to have these people come back to install it. I moved everything away from the old AC to install the new AC. I asked if they needed me to move anything farther away. I was told no. I had about 10, planter pots, some made by a family member who passed a way 15 years ago that are not replacable, and some ceramic pots from Home Depot that cost me $30 to $40, knocked off another storage containter and broke. I have gotten ahold of Abla or Alva the office manager several times. assured everything would be taken care of. I have left several messages since with no return call. I spoke with Lauren almost 2 months, who does the permits, sets up the inspections and fills out the Xcel rebate paper work, said it would be taken care of. I left a direct message for her two weeks ago no return phone call. I have been more than patient. My next call is to Home Depot to let them know how their customer has been treated through one of their contractors and on to the BBB. I should not have to have gone through all of this for a an AC to be installed. ARS is a shitty company. read more

Another great experience with Controlling Systems as they replaced both a furnace and AC that were older and beginning to have problems. Great attention to detail as they covered my carpets and even put plastic over the storm door to keep from scratching my solar film. The furnace is in an attic so they were working in a cramped and hot environment for most of the day without complaint. I could not get into the attic to view the work so Gemini took pictures and explained each part of what they had done and why. They tested everything after the work was finished and explained the new thermostat to a techno-challenged senior. Each of the four men who worked here was polite, friendly, and professional. I chose them for the installation based on previous experience and knowledge that I could trust them to stand behind their work. Elaine R. read more

Installed an AC system in an older house we bought. There were no air returns in the upstairs bedrooms. They were the only ones that would even consider doing the work. They got the work done in a day! read more

From estimate to installation, this crew was on their game. Ryan was helpful in walking us through our home's needs for a new AC. He was quick with the quote and got us on the schedule pronto (and even kept that date without delay, which I find rare these days). Gemini and Sasha were prompt for install and got everything running without any hiccups. What you want is someone who is not only timely and efficient, but also takes the time to run you through how to maintain the new system, and Gemini was that guy. And a tip: If you have a piano, let Gemini tickle the ivories. You won't regret it. Great job all around... Chris read more

Andy installed a new water heater today. He's very skilled and knowledgeable. Great job!

We have not used anyone else for years Now! I so wish we had used them to install our Boiler, they fixed all the problems that we had from the not so good install. They are prompt, courteous, and fair priced for the good job they have always done. Everyone there is kind and friendly and they always try and get service to you as soon as possible! They truly are the best! For them customer service is not a thing of the past! read more

Just had them replace my Furnace, AC, and tankless hot water heater. Great crew. Neat and professional. Did a great job explaining the work. We are very pleased with the work. read more

they replaced my condenser and furnace, plus installed vents for my kitchen and restroom exhaust. They were courteous , knowledgeable, and there work is of high quality. I will use them again if I have any HVAC work. read more

As always, Controlling Systems did a great job. I had them install a new central air conditioning system and a new furnace. They are not cheap but they are reliable, professional, and honest. read more

Controlling Systems is the best HVAC company that I've ever used in Denver. We had a very complex air conditioning installation due to an attic that is way too small. As a result, we needed some follow up work to teak it and get it working optimally. Controlling system really stood behind their products and their install and didn't quit until it was right. They were very responsive and courteous. I highly recommend them. read more

Always dependable. We have maintenance agreements for both our home and rental townhouse. CS remedied all the initial problems when we purchased our home in 2021. Their staff are true experts. Beyond that kind and courteous. read more

I've used Controlling Systems for more than 25 years. Everyone of their representatives coming to our home during that time has been knowledgable and professional. Recently we received a bid from Ryan for a new air conditioner and furnace. A week ago Roman and Gemini spent 10 hours in our home installing them. They performed in an an excellent manner. They communicated well throughout the process, answered all our questions and clearly covered the operations of all they installed. We appreciated their willingness to explain all their work and their guarantees. All was good. Controlling Systems will continue to be our first choice for heating and air conditioning. read more

They were very considerate in understanding my communication difficulties. Came out and did a thorough evaluation. I have nothing negative to say about them. Just decided to go in another direction. read more

We had a previous HVAC company come out and diagnosed our AC unit as having a refrigerant leak and quoted us $2100 to repair the line. This was assuming the leak was in the line, and that it was repairable. They drew up 3 quotes for a new system which I thought was odd. I called Controlling Systems as a second opinion, and Aireus came out. Within 10 minutes, he was not only able to find the leak (on one of the valves at the AC unit out back -- apparently a common leak spot that the other company missed), but he was also able to make a same-day repair. I'm 100% glad I called Controlling Systems for that second opinion. They definitely gained a customer for any future repairs. When I need a new system I also know who I'm calling. read more

I was impressed how quick they came out and resolved our issue. Aireus was our technician he was super friendly and quickly found the problem. The price was very reasonable. Will be calling them in the future! read more

Excellent, easy service! They are very reasonably priced & getting an estimate was fast and simple. They didn't try to push us into a purchase & worked to find available rebates & discounts when we did decide to go with a new system. The install was faster than estimated & everyone was incredibly pleasant and kind. Next time we need anything updated or fixed for our heating/cooling systems we will be using them. read more

Best service and professionalism from the team. They came to analyze a duct design situation and solved it after 4 other try's I had with other vendors who claim to be knowledge it were not. The team came and worked for 2 days , always kept the area clean and keeping me informed. Their price was very competitive as well so you get great value and fresh seduce. Hats off for these guys. read more

Hallelujah! Gave these guys a call based on the Yelp reviews and everything went super smoothly from booking to finish. I've had bad luck with service appointments with other companies in the past so I am always ready for the worst when I have to book any sort of service appointment, but these guys provided service as it should be! They called to confirm their arrival, were within my appointment window, and I am back with heat on. The technician provided a ton of really helpful information and options in getting me back on and for future work to keep my system running great. I will definitely use these guys again. read more

After over a month of sending messages and multiple calls to see if someone could come out to service our AC unit and also service 30 of our neighbors AC units. I still haven't been able to get an answer back. Unfortunately I can't speak on the actual quality of the work they do but their customer service needs major improvement. Very frustrating and disappointing dealing with this company. read more

We've been working with Controlling Systems with all aspects of HVAC in our home for over 8 years. They've been consistently reliable, helpful, and fast, and we recommend them to all of our friends. read more

We had Controlling Systems come out to inspect our furnace before the winter season. To preface-- we are first-time homeowners who did some research online before hiring someone, but we are by no means experts. We chose this company because of the mostly-positive Yelp reviews. Sean came out, took apart the majority of our furnace, came up and told us the heat exchanger was missing a cap and the entire furnace needed to be replaced immediately. He also said he needed to leave the furnace disassembled, because that's what another company would prefer when they came out for a second opinion, plus he said putting it back together may risk a carbon monoxide leak. He did give us the option to reassemble it, but he pushed for leaving it disassembled. Since we felt like we should trust the experts, we took his advice. That absolutely was a mistake on our part. We did decide to have another company come out for a second opinion, to examine all our options. When the tech showed up, he asked me "what the hell happened down here?" when he looked at our furnace. I told him what happened, and he said a tech should never leave the furnace disassembled. He put our furnace back together and began his inspection. He turned our furnace on for a while to also check for any carbon monoxide leaks and tested how the furnace was running as well. This is not something Sean did. The second-opinion-tech from the second company said that other than a couple of very minor (and not time-sensitive) issues, our furnace is in fine working condition and will get us through this winter with no issues. Bottom line, we will never, ever work with Controlling Systems again. read more

Had some service done on my furnace. Great service. Prompt and very nice to deal with. Did a great job! Thank you for coming right out!

I've used Controlling Systems over five years and two houses. Let's start with reliability, something always appreciated. CS techs arrive when they are scheduled. They do great work and are nice to work with. Most recently, Izzy came to service my central AC. He found a ridiculously high buildup on the condenser coil. (Previous owners probably had no service on it for years.) It was an extra cost to clean, but that meant the unit won't shut off now at 80 degrees. More than worth the cost. Speaking of cost, ask for the annual maintenance contract. Great deal. read more

Amazing service!! Kind, reliable, professional, and knowledgeable. They'd been servicing our old A/C unit for years; we finally decided to do a replacement and couldn't be more happy! Highly recommend. read more

I contacted Controlling Systems to replace our old gas powered water heater with a new heat pump water heater. From the day I called to the day it was installed was exactly one week, and they managed to fit me in just before the deadline for the Denver Climate Action rebate. After the initial installation, we realized that the mixing valve wasn't working correctly, and they came back the next day to fix it right away. Even though I talked to multiple different people through the process, it felt like everyone was on the same page, and there was no miscommunication. Everyone on the team from the owner Bill on down was professional and a pleasure to work with. Thanks to all of you guys! read more