The Best 24-Hour HVAC Services in Denver, CO

We are a professional, full-service HVAC company serving residents of south Denver. Our highly trained technicians can repair, maintain, or replace any heating or cooling equipment you’re currently utilizing. We also install new systems and can recommend optimal energy efficiency practices and products. Our goal is to ensure all our customers enjoy comfortable indoor air throughout the year while providing fair, honest, and expert service. No job is too big or too small for us to handle, and we will be at your door as soon as possible to get your situation remedied. Call Mercury Heat And Air Conditioning today to learn more about our heating and cooling services.

HVAC Service technician at Mercury Heat and Air

We proudly offer the following top-quality HVAC services:

  • Heating and Cooling System Repair

    HVAC systems should work efficiently, reliably, and as powerfully as possible to keep your family comfortable (and your bills low!). Our friendly team of professional HVAC technicians is ready to help you achieve both!

  • Replacement Parts

    Don’t overpay for HVAC supplies. Our large inventory of replacement parts can help get virtually any HVAC system back up and running.

  • Planned Maintenance Agreements

    Maximize the lifetime of your HVAC systems with regular preventative maintenance from professional HVAC technicians. Our team will identify problems and repair them before failure ever occurs!

  • Financing with Approved Credit

    Take advantage of our available financing options and receive Mercury Heat and Air’s exceptional heating and cooling services on flexible, friendly terms.

  • Residential and Commercial Services

    We proudly serve both residential and light commercial HVAC services in the Denver metro area. Call us today for a free estimate!

  • Duct Cleaning and Care

    The average duct system needs to be cleaned every two to five years. Extend the lifetime of your heating and cooling systems with professional duct cleaning from Mercury Heat and Air.

  • Indoor Air Quality

    It has never been more important to ensure each other’s safety with clean, pure air in your home or business. Get a professional indoor air quality audit from our experienced HVAC technicians.

  • Environmental Assessment

    Our expert team will assess the environmental impact of your HVAC systems on your home or business to help improve energy efficiency and reduce your footprint.

  • Hybrid Heat

    Take advantage of the benefits of an intuitive Hybrid Heat system with intelligent control for both gas and electric heating that can actually react to changing conditions.

  • Duct Free Systems

    Ductless HVAC systems (or mini-split systems) are incredibly efficient and provide consistent room comfort. Let our professional team of HVAC technicians help you find the best duct free system for your home.

  • New System Installation

    Choosing the right HVAC system for your home is never a one-size-fits-all situation. Our courteous and professional HVAC experts come to your home to determine precisely which heating and cooling solution will work best for your budget, preferences, and other factors important for you and your home’s comfort.

Honest Work, Fair Price—100% Satisfaction Guaranteed

The certified technicians at Mercury Heat and Air Conditioning in Denver will treat your heating & cooling problem like it’s our own. Whether you need specialized repairs, your HVAC system inspected or your unit replaced, there is nothing our team can’t handle. Our friendly and professional HVAC experts offer straightforward service explanations, upfront pricing and your satisfaction is 100% guaranteed. We are a 4th generation Colorado native family-owned business, and we understand the importance of protecting the comfort and safety of your family. We’ll show up on time, and we’ll get the job done right the first time – guaranteed. We provide trusted emergency HVAC services across Denver and the surrounding areas.

Why Our Customers Love Us 

5 Star Reviews

“Ray and Zach were very thorough in removing my old furnace, vacuuming the entire closet before putting in the new furnace. They were very careful not to track in any snow or dirt, they put down drop cloths to walk on. They made sure I understood the thermostat before they left. They completed the job in speedy time. I thank Ray and Zach again for a job well done.”

Patricia J. , Littleton, CO

5 Star Reviews

“Extremely responsive (even on a Sunday), reasonably priced, and excellent work. Within minutes of having issues with my garbage disposal this past Sunday, they were at my location with a replacement. Highly recommend.”

David R. , Denver, CO

5 Star Reviews

“Neal is a friendly, efficient and professional technician. He installed my garbage disposer in under an hour and then explained how it differed from my previous one and how to care for it. Really nice guy! Overall, the response was fast after I reported needed a new one in Home Advisor and customer service was excellent.”

Jennifer M. , Denver, CO

5 Star Reviews

“Quick response call for appointment setup; excellent customer service. Install was done the next day with professionalism, courteousness and the new unit works fine. Keep up the good work.”

Derrick C. , Denver, CO

5 Star Reviews

“I am so glad we went with Mercury for our new AC system. Ray showed up quickly with a mask on for a quote and answered all my questions. We got a quote within a day, which took some companies weeks to get to us. The quote was extremely reasonable.”

Jena D. , Denver, CO

5 Star Reviews

“Very pleased with the technician Neal Porter friendly and courteous. The job was completed quickly and an excellent job. I will definitely recommend Mercury Heating Air to all my friends.”

Ed S. , Aurora, CO

5 Star Reviews

“The Experience was FIVE STAR! When we needed someone to be there, Mercury Heating and AC made sure the AC was working when my son was released from the hospital. This kind of company and their response is very much appreciated. Thank you Ray and Mercury. Great job!”

Fred K. , Parker, CO

5 Star Reviews

“Ray was very knowledgeable and gave a great competitive price. They only took a few hours to install my furnace. They were on time and answered all my questions. I had about 3 other quotes that were not even close. I would recommend to others for their great service!”

Johnnie G. , Denver, CO

5 Star Reviews

“Ray was an amazing professorial and showed me everything so I could make the right decision for my home. I highly recommend Ray for any homeowner. Also his amazing responsiveness was outstanding. Came on Sunday and replaced the furnace on Monday! Thanks Ray!”

Dennis N., Denver, CO

5 Star Reviews

“Ray made it out on the same day I contacted them (which incidentally was a Saturday). He was very knowledgeable and professional. He was able to replace my deceased furnace first this Monday morning (which was great because another cold front was on its way). He did a great job installing the new equipment (very neat and detailed). I will recommend them to others and I intend to use them again (I have a pending AC project that I will likely do in early spring).

Andrew B. , Littleton, CO
Read more reviews

Mercury Heat And Air Conditioning

Contact Info

  • Address: 5082 E Hampden ave Denver CO 80222
  • Phone: 720-805-1717
  • Email:

Working Hours

  • Monday – Friday: 8:00 AM – 5:00 PM
  • Saturday – Sunday: By Apt
Mercury Heat and Air is HomeAdvisor Screened & Approved


Our Specialists