Reviews of local pros in Greeley, Colorado

A to Z is run by honest, professional locals who you can trust and that is really important when dealing with your whole house. So, happy to know you, Derek!

A to Z has serviced both my AC and Furnace as well as my Dad's. They always do a great job, I am 100% confident when ever referring them.

Levi Davis, is the guy! He came in with a big welcoming smile, diagnosed our problem, and fixed our AC! I couldn't be happier with the outcome. We will be going with A to Z from here on out!

I've had two occassions to use A to Z, since they were referred to me by a friend, and I can see why my friend referrs them! Super nice, very knowledgeable, easy to work with. Did I mention super nice?! They really are going to be the HVAC company I refer from now on. Great people!

Derek and Anthony (the owners) are amazing people and incredible businessmen. They come out immediately and figure out the issue as quick as possible. They will only do what is necessary without any hidden charges and extras that are not needed BUT they go the extra mile. I highly recommend contacting them for any and ALL HVAC needs...Heating or cooling. Great addition to our community and it is always a pleasure to support this local business!

We used A to Z for air conditioning repair and would highly recommend them to any one else. We have a mini split system that stopped working and they were able to come out and diagnose the problem quickly. They explained the repairs that were needed, and scheduled the repair. Just a few days later they had a cancellation and called to see if they could come over earlier. The repair was done quickly and advised us that we still had a few years left before we would need to look into AC replacement. They did not try to upsell or charge us for more than what was required. When the time comes that we need to replace our air conditioner we will be sure to use A to Z. If we need a furnace tune up or furnace repair in the future they will be our first call.

We recently had a whole new heating and cooling system installed in our small home, and we couldn’t be happier with the experience! From start to finish, the team was professional, knowledgeable, and incredibly efficient. They took the time to assess our needs, explained our options clearly, and provided a fair and transparent quote.
On installation day, they arrived on time, worked diligently, and treated our home with great care. The system was installed perfectly, and they even took the time to walk us through how everything works. The difference in comfort is amazing—we can already tell how much more efficient and effective our new system is!
If you’re looking for a reliable and honest HVAC company, we highly recommend A to Z Heating & Cooling. Great service, excellent workmanship, and top-notch customer care!
Thank you for making our home so much more comfortable!

I just wanted to express my deep appreciation for the service, expertise and knowledge utilized in the installation of a new Daikin Heat Pump with A to Z Heating and Cooling. Derek, Anthony, April, Levi, Shaun and Ryan are absolutely the best, hands down. I've utilized their maintenance services for years, and understood back then that this a company that is top notch in every way. They go "above and beyond" at all times, and take as much time needed to answer every question I had and do a quality job. As a bonus, I've gained friendships with a number of their staff, and always look forward to seeing them when they come out to service my unit. I HIGHLY recommend A to Z to anyone who wants a honest, quality heating and cooling company. They are "SIMPLY THE BEST'!!!

AtoZ just finished a five-head mini split system in our Red Feather Lakes home. The install was very challenging, and Derek and crew worked super hard to hide all of the large bundle of pipes inside of walls etc - it all looks great! The attention to detail was superb, and they did a fantastic job of putting all of belongings in place just as they found them and cleaning up once the install was completed. Derek did a very thorough job of showing me how to control the system even including an app that allows us to monitor and control the temperatures from our other home. We HIGHLY recommend them!

I bought my Daikin HVAC unit during the pandemic at which time very little was available for an American HVAC system. I learned about Daikin, researched it, and called A to Z. They came out and evaluated my home and needs. It was winter and our furnace was close to being non-functional. A to Z helped me choose the perfect unit and they had it installed quickly. I have had the unit for several years now and I absolutely love it! Works like a charm, extremely efficient, quiet, easy to adjust at the thermostat or remotely by phone, and excellent customer service. April is always pleasant and very professional. Service visits are excellent, and I am on an annual Furnace/AC maintenance plan which is perfect. If you are looking for a high quality, reliable and reasonably priced HVAC with numerous options - think about a Daikin. And I highly recommend A to Z Heating and Cooling.

Derek and his crew was the most professional installs I've ever had. From the beginning with his communication, to the end with his walk-through of how my new heat pump system works was top notch. I used to work for a custom home builder in a high end community and this was a better install than our contractors were performing. Derek also helped diagnose my existing furnace without an upcharge. I would give over 5 stars if possible and wouldn't recommend anyone else. Communication, timing, cleanliness, and budget awareness, you won't find anyone better. Thank you Derek and team!

Great team, work ethic, and customer service. AAA rated in my book.

Joe and his team are great! Always informative and honest about what is happening with the HVAC systems. They are prompt, professional and thorough. I highly recommend!

Top notch knowledge, expertise and customer service! Installed my new HVAC system in my home ahead of schedule and under budget. I recommend Advanced Mechanical Services to everyone who requires courteous, prompt professional service.

Forever grateful to Advanced Mechanical Services for literally diving into my situation in replacing our furnace before the coming freezing cold temperatures. They worked hard and fast kept in contact and were back in minutes after concerns. Proficient , professional, respectful, kind and friendly. Thanks again!

My furnace was giving me problems and went out totally in the coldest days of this year. Joe came out first on a Sun night to help with it. Then had another gentleman come out Mon (MLK Day) to fix the issue. Both were very helpful and worked through this crazy weather. Absolutely will recommend to anyone who needs their services.

If you are looking for professional quality HVAC work look no further. Every experience we have had with Advanced Mechanical Services has been top notch. The work is always done right and the customer service is exceptional. We switched from another local company because the work was not good. We are happy we made the change and will continue to use Advanced Mechanical Services for all of our HVAC needs. Highly recommend this company!!

My property management uses this company and they are quick to respond and work with my schedule. Our heater stopped working last week and the woman that serviced our furnace was able to keep the heat going until we were able to get a new motor. Great and professional company. Everyone should use them.

My A/C cut out last night and I called AMS first thing this morning. Amanda was friendly and helpful and told me they would be able to get someone out to service the system the same day. Joe arrived promptly and within minutes had the trouble diagnosed (failed Capacitor on the Condenser) and he had the replacement unit on his truck. He was in and out in less than 30 minutes-- fantastic! My system is up and running like new. AMS will definitely be my go-to folks for future HVAC needs.

Service tech Jaime Lomeli Montes did an amazing job fixing my AC. Very friendly and professional!

Air X-treme always exceeds our expectations! They are honest and pleasant to work with. Jaime is very knowledgeable and professional. We will absolutely use this company again in the future!