I needed my A/C repaired immediately and received some outrageous quotes from different companies. Luckily, I came across Duffy's on Yelp. Shaun responded quickly, did a thorough inspection, and gave me a reasonable quote with immediate installation for a complete HVAC system. He was very polite and informative, not rude or pushy. He and his crew replaced the complete system in one day, including old system haul away. They provided quality installation at a reasonable price. Would definitely recommend if you need an HVAC system or repairs! read more

My A/C went out last night and Shawn arrived this morning. He repaired it quickly. I thought I might need a whole new A/C unit. Turns out it just needed a new part. He didn't try to sell my something I didn't need. The cost was minimal. I would Trust Duffey's over any of those big fancy painted vans who try to sell you something you don't need. I won't even consider calling them. Always call Duffey's Heating and Air Conditioning. read more

Thanksgiving week my 20-year-old Bryant furnace failed (rusted heat exchangers) so I got four bids from two kinds of contractors: two high overhead corporate HVAC companies with fancy brightly-colored vans and starched-shirt techs, and two small business HVAC'ers with low overhead, decaled pickup trucks, and jeans. While I was prepared to pay much higher replacement costs across the board than pre-Covid prices , the bid range was shocking, as much as $15K difference between high and low. Duffey's was one of the low bidders, and I am so glad I went with them. The higher bidders tried to upsell me to replace my AC at the same time, get a higher btu furnace, etc., but not Shawn Duffey. Instead, he explained why my current size was fine, and respected the fact that heat was the priority. But what impressed me was how he explained parts availability for the brand he would install (Amana) and certain models whose parts replacement costs were as much as 50% lower (pricey variable vs torque-drive motors). He and his helper Mike came over and had the old one out and the new one installed, including wider venting pipes and other upgrades, cleanly and efficiently in about 4.5 hours. He also had the new furnace delivered by the distributor, who hauled the old one away for recycling--again, saving costs. But what really impressed me was he refused payment until Jeffco signed off on the inspection the next week. So Shawn and Mike literally installed the same Amana, with upgraded venting, for $13K less than the top corporate bidder, and I couldn't be happier. So lessons learned: 1) get at least four bids from different kind of companies, 2) if there is any upsell, avoid, and 3) make Shawn Duffey one of your bids. I highly recommend going with him; you will not be disappointed. His service area is also limited to SW Denver Metro, and that's a good thing. Local, knowledgeable, reasonable, and personable. read more

Duffey's Heating & Air Conditioning - Heating & Air Conditioning/HVAC Near Me - Littleton, Colorado

Shawn came and explained and suggested to be replace on AC and furance. His price was very fair and reasonable. It was installed on June 12, 2025. We are happy and would recommendation to anyone who may need it. read more

Called Duffey's because we have an old lennox system that is starting to fail. Just in describing the problems to Dorthy, she immediately went into things I can try on my own to fix the problem, helped check my general assumptions and worked over the course of the morning to provide several back and forth help sessions. Seriously awesome support, definitely have my business in the future. Super responsive with real recommendations. read more

Awesome service. Furnace was out when I woke up the other day when we had our last snowstorm. Duffey's had my furnace running again within 3 hours of me waking up to a 63 degree house. Fast, friendly and good pricing! read more

I was having trouble with my furnace (on the coldest weekend since forever naturally). Mike showed up in about an hour, did a thorough check of the system, set up a work around until a part was available then came back in the evening the day he got the part and installed it. The furnace is not only repaired but works better than it ever has while I've lived here. They are definitely where I'm going from now on. Thanks guys! read more

Shawn was so knowledgeable, helpful, and quick! He came the day I called him, and was here for less than an hour. The cost was reasonable and he was very friendly. read more

We had a great experience with Duffey's today. Our AC suddenly stopped working this morning and within a short time our house was getting pretty uncomfortable. I called and left a voicemail and received a call back in a short time and was able to make an appointment for the same day, within a couple of hours . The technician that showed up was very professional, was wearing a protective face respirator and kept his distance while in our home. He was able to quickly diagnose and fix our issue and the cost was reasonable. I highly recommend! read more

Really great service from Mike! He came out and inspected our AC unit, diagnosed the problem and was able to get it fixed! He provided great explanations of our problem and what he did to fix it and things we should watch for in the future. read more

My ac has not worked in 8 years. I have had several repair companies out with not much luck except the option to buy a new unit. Duffey's came out early, found the problem in 5 minutes, had parts with them, and for the first time since moving into this house, was able to get the temp in my house to 74 degrees on a 100 degree day. I will be using them for any hoax need and strongly recommend them. read more

I knew the furnace in my new (for me) house was old and in need of repair and I brought in a firm which sends out a letter with huge discounts to inspect it (It turned out that I didn't qualify for any huge discounts) and then I had one of the big box stores give me an estimate to replace it. The estimate was way more than I had expected. Finally I called Duffey's for a second estimate because of their good reviews on Yelp. I liked Shawn right away, and asked him to prepare an estimate which he said he would send later in the day. Even before the estimate arrived I had decided to give him the business. When his estimate was about half of the big box store I was even more sure. He did a wonderful job of replacing the furnace and my hot water heater. But the best part was working with someone one I could trust. ( don't know how to explain it - but working with the owner, rather than the salesman of a larger firm, make it easier to trust) If you need HVAC work, give Shawn a call. read more

My furnace has been working fine (that I can tell) but I recently installed a Nest thermostat and it sent me a message that my furnace might not be working properly and I should have it checked. Mike came out ran a full diagnostic on my system. He clearly and thoroughly explained what was going on with my system and provided a number of recommendations on how to improve my system's performance in relation to the message I was getting. He didn't try to sell me a new furnace and explained to me the diagnostics tests he ran and the test results. Mike is clearly very knowledgeable about my specific furnace (which is about 25 years old), furnaces in general and provided a lot of helpful information. I'd highly recommend Mike and Duffey's HVAC. read more

This is an outstanding reputable company. The employees are paid by the hour and not on commission so they will not try to talk you into something you don't need. I called on. Friday night for a cleaning on my furnace for the sale of my home. They called me first thing Monday morning and came the same day. Amazing service, amazing company. I recommend them to all of my friends. read more

Came home at 4 p.m. to find the A/C not working. I assumed I would have to suffer until the next day but Duffey's was able to come the same day! Woot! So, we're off to a good start with Duffey's. Shawn was a very friendly guy, prompt - arrived at the time he said he would despite coming from another job. Within the hour he had the problem diagnosed, had parts on his truck and it was fixed....ahhh, cool house again. Service call, parts and labor were all reasonable - didn't seem too high or too low. He also gave me some tips on things I can do to keep the A/C running better and save myself some money. I appreciate that. By all counts Duffey's was great to work with and I would recommend them to anyone! read more

Duffey's does an amazing job! Quick service, friendly, and professional. Shawn and Mike have taken care of us on 3 occasions and they have always been fair and reasonable. They even helped me make a temporary fix over the phone until they could arrive and fix the problem. Fantastic customer service and I would recommend them 100%!! Thanks Shawn and Mike!! read more

I had to call Duffey's after I had another company come out to service my furnace and tell me that I needed a new furnace. They were able to come out the same day and ran some diagnostics on my machine and explained everything they were checking and what they were doing on the furnace. Turns out the furnace was completely safe and they saved me from buying a furnace that I didn't need. It was the best service experience that I have had with an HVAC company and I highly recommend them if you want honest, reliable and quick service. I am extremely thankful and impressed by their customer service and will definitely use them again and let everyone I know about them as well. read more

Heat went out yesterday morning. Called Duffeys because of great Yelp reviews. Was very cautious because of bad experiences with other HVAC companies. Diagnosis was quick and with no upsell attempts. They had to special order the part because furnace is quite old. Fixed today, heat is back on, and price was very reasonable. I recommend these guys. They are honest and they are good. read more

Our a/c unit broke on Saturday night..we made a few phone calls Sunday and left voicemails. Duffey's called my husband first thing this morning (Monday) and had Tim out here by 11:30am. He was friendly and was quick to diagnose the problem (some sort of fuse melting if I understand correctly). He left to get a part and had our unit up and running within 2 hours from arriving. I always get nervous when something breaks that I'm not knowledgable about but I'm glad I found Duffey's on Yelp. Fast, fair-priced and trustworthy. read more

Shawn was on time, quick, clean, friendly, knowledgeable, and went through more than the necessary repair. The repairs were completed quickly and professionally, and for a very reasonable cost to me. I can recommend Duffey's without reservation. And i will go a step further. When I find a vendor or contractor this good, I'll put them on my recommended vendor wall on my new website.Duffey's definitely earned a spot there. read more

Shawn was great and got someone out the same day. Mike was on time, answered all my questions and was professional.

I was very happy with Duffey's. After contacting 3 other HVAC companies about a humidifier, Shawn was the only one who took the time to walk me through several options. And, on top of that, I was hoping to get the job done super quick, because we had relatives visiting who were really sensitive to the dry air. Shawn got me in--which I really appreciated! Mike installed the humidifier and was polite and efficient. I'd definitely recommend them! read more

Same day service, excellent service! By the time Shawn arrived, he turned the AC on, and it remarkably came back to life. He explained that the motor may have overheated and may need to be replaced soon, but it's working for now, so we didn't replace anything this time. He didn't charge me anything, since he didn't actually repair/replace anything which is awesome! And, he took a pic of my AC serial number so that he can easily order me a new motor when I do need one! He also spent some time educating me on how the AC works, it's limitations, and how to get the most life out of it. Great guy, great service! read more

My AC decided to stop working the other day when it was 95+ degrees outside. The result: my home became a sweltering hellhole within about 20 minutes. After calling around and getting told I couldn't have anyone come out until at least July 1, I called Duffey's. Shawn told me he was very busy but that he would get to my house that same day. And even though he was delayed due to a problem with his truck, he still showed up and promptly replaced the capacitor. I felt the price was extremely fair and I really appreciate Shawn's willingness to squeeze me in on a day when many other homeowners were having AC problems. When we need any HVAC services in the future, we are calling Duffey's first! read more

Tim came to my house after hours, fixed the problem with our AC and diognosed the problem immediatley! Didnt take much time at all fixing the coils and I could tell he is very experienced! He was was super knowledgable and explained the problem and how to fix it in the future, even offered to come back on a free call if there was an issue. I will definitley recommend him to all my neighbors, family, and friends. Very affordable and efficient. Thanks Duffeys for a great technician! read more

I have been using Duffey's H&AC for about 3 years now. I have a newer house but a temperamental furnace. I believe there is a faulty issue somewhere in it which has caused problems since it was installed (before Duffey's was called). Shawn Duffey was recommended to me and I loved that he is local and independent. His guys are wonderful and very knowledgeable. I can get appointments right away and they educate you and don't make you feel like an idiot lol. The prices are very reasonable. I also like how I get 1 of 2 of the same guys each time so there is a familiarity. The company before them who installed the furnace were expensive, I always got someone different and then got charged for the time it took for them to learn the furnace. And every person had a different theory as to what was wrong. I was also charged for services they didn't do or do well such as cleaning. Mary read more

I had received a furnace service from another company and they claimed that my CO levels were too high so I would need to buy a new furnace. I was suspicious, so I called Duffey's. They had a technician out within 3 hours and he confirmed that we didn't have a CO issue. The technician was courteous and was good at explaining all the meter readings to me. Duffey's has won my business for the future. read more

We recently had an AC issue, and not only was Shawn responsive but very fair. He reacted professionally and ethically, demonstrating the attitude you crave from a repair service. I can't thank Shawn enough and recommend his services to anyone. He was terrific. read more

Mike M showed up right on time and spent the day fixing our furnace. He kept at it explaining what was happening throughout the day and even had to run and get additional parts. Fast, no surprises, very knowledgeable, fairly priced and thorough! Thank you Duffey's and Mike M for your help! read more

Duffey's did a wonderful job replacing my furnace. Their quote was fair and they were done in one day. The Douglas county inspector also said the installation was very good. read more

If you need your HVAC system serviced or repaired don't look any further than Duffey's. Shawn came and tuned up our AC and it is running like a champ. Prior to Shawn's visit the unit was running a lot and not cooling the house effectively. Not only is our house cooler (the AC can actually hold the desired temperature now) but it doesn't run nearly as much. I only wish we would have know abut Shawn earlier. He was extremely professional and courteous and answered all of our questions. He made his repairs quickly and for a very reasonable price. I can't recommend Duffey's highly enough and for any future heating or cooling needs we have we will certainly be calling him. Thanks a "ton" Shawn. read more

Shawn was amazing to work with. He actually came out the same day that I called him and had fixed my heater within 30 minutes. His prices were very reasonable and he didn't try to upsell me on anything else. He was extremely professional and gave me advice on how to make my heater run more smoothly in the future. I will never use anyone else for my AC and heater repair needs. Thanks again Shawn, you're the best! read more

I came home last week to a 49-degree home after being gone on vacation for two weeks. After reading reviews, I called Shawn. He was able to be at my place within an hour to take a look at my furnace. It turned out my ignitor light was just dirty which he was able to clean, and my heat was on within 10 minutes of his being here. Shawn is fantastic, friendly, and completely trustworthy. I can't help but wonder how many other companies may have charged me for a replacement while Shawn just let me know it was dirty. He easily won a new customer that day, and I highly recommend him to anyone. read more

After just getting our AC working (by another company) my husband had to have heart surgery, wouldn't you know that the AC broke again. After getting Shawn's contact info from a family friend I spoke with Shawn and tried to explain the problem over the phone. He came out took a look at the AC could not get it to repeat the problem, so he called me and said he would check back periodically to see if the problem would duplicate, sure enough on one of his checks he found the issue. Right away had the part and got the unit fixed all while I was sitting in the hospital with my husband. I tried to pay him and he told me to wait that he wanted to make sure everything was working first! I was blown away! In todays times that just does not happen. I can honestly say I have NEVER meet a more genuine, honest business man. I will definitely be a repeat customer if and when we are in need of an AC/Heat company I will be calling Shawn back! Thank you Shawn for all that you helped with in the most stressful time! My husband I appreciate your honesty, quality, and timeliness. read more

GREAT SERVICE!!!! I was able to get help the same day, Tim who came to my house had incredible knowledge of the heater and the fix was quick and cheap. Thanks for the great service I hope not to be back anytime soon but will call Duffey's to help me going forward! read more

When you find your AC doesn't work in the middle of a 100-degree week, you need to find someone who can help you out fast! Luckily my husband got ahold of Shawn, who was easy to reach and was available to help us out that day. Shawn gave us an initial quote up front to come out and see what was going on with our AC, which was comparable to quotes we got from others. Shawn arrived on time and was very friendly. I know this is probably silly to non-dog owners, but Shawn was so kind and patient with our little pup who is pretty anxious about strangers coming to our house (he even took some time to feed him a few treats and earn his trust). Once our dog realized Shawn wasn't scary and decided to stop barking, Shawn got right to work. He was really thorough in his quest to figure out what was going on and was able to quickly diagnose the problem. Shawn also talked about something he could do to prevent the same problem from happening again, but never put on pressure to up-sell or try to convince us to do it. Overall, Shawn was friendly, thorough, and honest--if you need heating or air conditioning work, I highly recommend Duffey's! read more