AC Replacement / Installation
AC Replacement & Installation Services in Highlands Ranch
Upgrade your comfort with our professional AC replacement and installation services. Whether you need to replace an outdated unit or install a new system, our experienced team ensures a seamless process, providing you with efficient and reliable cooling for years to come.

Expert Installation
Our certified technicians install your new AC system with precision, ensuring optimal performance and energy efficiency from day one.

Tailored Solutions
We assess your homeās specific cooling needs and recommend the best AC system to fit your space and budget, providing personalized comfort.
Trusted AC Experts in Highlands Ranch
High-quality AC Replacement & Installation Services
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At Fireside Heating and Cooling, we make that upgrade straightforward. Whether you are replacing an outdated unit or installing a new system, our experienced team ensures a seamless process and reliable cooling for years to come.
If your system has already failed, we can move fast. Our emergency AC installation services keep your Highlands Ranch home comfortable when a breakdown hits in the middle of summer.
Our AC Installation Services
Choosing the right AC system matters as much as the install itself. As one of the AC installation companies in Highlands Ranch homeowners rely on, we assess your home’s size, layout, and cooling needs, then run a load calculation so your new unit is sized correctly. Right-sizing saves energy and helps the equipment last.
Our certified technicians then handle the installation with precision for optimal performance from day one. We walk you through your options honestly, weigh efficiency against budget, and back every system with a manufacturer warranty on parts and labor.
Why Highlands Ranch Homeowners Plan Ahead for Replacement
The strong summer sun and dry heat along the Front Range put sustained demand on cooling equipment. A system near the 10 to 15 year mark often shows its age fastest during these stretches, the worst time to lose air conditioning. That is why many homeowners replace an aging unit in spring or fall, when temperatures are mild and scheduling is easier. Planning ahead also gives you time to compare AC installation services and financing options without pressure.
Why Choose Fireside Heating and Cooling
We are a locally and veteran owned business with more than 11 years of HVAC experience, fully licensed and insured, and committed to a 100% satisfaction guarantee on every job. We offer flexible financing with no money down, accept all major credit cards, and provide same day and after hours service when you need us most. Our goal is honest, dependable work that leaves you with a system you can trust.
Ready to Upgrade Your Cooling?
DWhether you need routine AC replacement or urgent installation, Fireside Heating and Cooling can help you choose the right system. Call or request a free quote online to schedule service.
What Sets Us Apart
Why Choose Fireside Heating & Cooling?

Same-Day & After-Hours Service
Enjoy prompt HVAC solutions with our same-day and after-hours availability.

Locally & Veteran-Owned

Convenient Payment Options
We accept all major credit cards for a hassle-free payment experience.

100% Satisfaction Guarantee
Your satisfaction is our top priorityāguaranteed every time.

Honest & Reliable Service
Count on us for trustworthy and dependable HVAC services.

Flexible Financing Options
Get HVAC services with no money down and affordable monthly payments.

Over 11 Years of Expertise
Benefit from our extensive experience in delivering top-notch HVAC solutions.

Fully Licensed & Insured
Rest easy knowing our team is fully licensed and insured for your protection.
Testimonials
What Our Clients Say?
Posted on Google Meg Reinis Nixon is smart and quick and honest and kind. He did exactly what he said he would do and quickly assessed the issue and knew exactly how to fix it. His pricing is great and I will use him every time. Best AC company I have found. Hands down.Posted on Google John Sepich Our 2 mini-split units received their annual services today. Nixon arrived early for the service appointment. Before beginning his tune-up/cleaning, he asked if there were any issues that should be addressed during the visit. I mentioned an issue that occurred during the heating season. Both units(exterior washed/interior units checked for drainage and issues) were given a clean bill of health. Due to a leaking cooling line cap last year, there was a need for additional cooling material. Visit was punctual, friendly and professional. We even discussed setting up a twice a year maintenance schedule being proactive.Posted on Google Doug and Elizabeth Goudy Company owner Nixon was extremely knowledgeable and was able to explain things such that even I could understand it. He and his staffer Zeke were efficient and courteous. His price quote stayed the same from start to finish and work was done under the time estimate. I am 1000% pleased and will now use his company for routine maintenance.Posted on Google Robert Fischer The big fear when hiring an hvac contractor is that the service technician is looking for every opportunity to upsell or replace a furnace or ac unit. At least, I feel this way. But, what I experienced with Firestone was straight forward and honest. Instead of upselling, Nixon quickly determined where to look for the problem and then he fixed it. Easy peasy. Firestone over delivered. I will call them again when I need my hvac serviced again.Posted on Google Kevin Devaney Only company I use.Posted on Google Kevin Devaney Great service, very reliable and "Nixon" is a pleasure to work with.Posted on Google Ryan Griss We had a second HVAC unit installed in our large home. It was built with only a single unit which struggled to heat and cool the second floor. It was a big project, but service and installation went smooth.Posted on Google Lindsy Robinson Nixon was amazing. He was so professional. Very personable. Gave us options and wasnāt trying to rip us off. He knew the issue and helped us solve it! Will recommend to others!Posted on Google Blake Drnec We had great service, prompt estimate by the owner named Nixon, and a good price. Very friendly, no pushy sales, gave us three options and actually took less time than expected! Highly recommend this company owned by Nixon. Oh, and Nixon comes on site to ensure quality work at each appointment!Posted on Google Jeff Hanks I've had Nixon from Fireside Heating & Cooling over to our house twice in the last week (two separate issues) and he's been nothing but professional. He quickly identified the issue both times and either repaired or advised on the best course of action. Most importantly for me, he explained what was going on, how to prevent it in the feature and didn't try to scare us with "this is going to be a huge problem - you need to spend a large amount of money or replace your furnace and AC right now", like we so often here. He was very pragmatic in his approach and its clear he's trying to win customers the right way, through great customer service, transparency, and being fair.Load more
Other Services

AC Repair
Keep your home cool and comfortable with our expert AC repair services. We quickly diagnose and fix issues to restore your system's performance.

AC Maintenance
Regular AC maintenance extends the life of your system and keeps it running efficiently. Schedule your tune-up today to prevent costly breakdowns.

Furnace Repair
When your furnace breaks down, count on our skilled technicians to get it back up and running quickly, ensuring your home stays warm.

Furnace Replacement/Installation
Invest in a new, energy-efficient furnace with our expert installation services. Weāll guide you in selecting the best option for your heating needs.

Furnace Maintenance
Prevent unexpected furnace issues with our thorough maintenance services, designed to keep your heating system in peak condition.

Ductless Heating & Cooling Services
Experience flexible, energy-efficient comfort with our ductless heating and cooling solutions, perfect for any space.
How It Works
Simple Steps to Your Free Quote
Getting started with your HVAC project is easy. Follow these three simple steps, and weāll provide you with a transparent, no-obligation quote that fits your needs and schedule.
Get In Touch
Call us or submit an online request, and rest assured, a dedicated member of our team will be in touch with you promptly.
Discuss Your Project
Speak to our experts about your project, and weāll discuss product choices transparently, explaining the process step by step so you can make informed decisions.
Get a Quote
Weāll provide an accurate, obligation-free quote and work with you to schedule your HVAC project at a time that suits you.
Frequently Asked Questions
What are the signs that I need a new air conditioner?
How do I choose the right AC unit for my home?
Are there financing options available?
Do you offer emergency AC installation services?
How can I schedule an AC installation?
How long does AC installation take?
What is the best time of year to install a new air conditioner?
How do I know if my current AC unit is the right size for my home?
How long will my new air conditioner last?
What type of warranty do you offer on AC installations?
Which areas do you serve?
We proudly serve the Denver-metro region including Aurora, Castle Rock, Centennial, Denver, Greenwood Village, Lakewood, Parker, Littleton and Lone Tree.
