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 Whether you need to replace an outdated unit or install a new system, our experienced team ensures a seamless process, providing you with efficient and reliable cooling for years to come.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 home’s specific cooling needs and recommend the best AC system to fit your space and budget, providing personalized comfort.



Trusted AC Experts in Highlands Ranch
AC Replacement & Installation Services in Highlands Ranch
Choosing the right AC system for your home is essential for maintaining comfort and efficiency. Our team guides you through the selection process, offering expert advice and high-quality installation to ensure your new system meets your needs. With our comprehensive services, you can enjoy a cool, comfortable home all summer long.
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
Proudly serving Highlands Ranch as a locally and veteran-owned business.
Convenient Payment Options
We accept all major credit cards for a hassle-free payment experience.
100% Satisfaction Guarantee
Your satisfaction is our top priority—guaranteed 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?
Jeff Kroll2025-09-26 Great service and good knowledge of systems. D E2025-09-13 Nixon was great! When I was unable to resolve my hot water heater pilot issue myself, I feared the repairs would be costly. Not only did Nixon repair the problem within an hour, but did so within their standard service call fee. nicholas smith2025-09-09 Nixon is a true professional, he got straight to the point and explained everything in detail. Everything on the invoice was absolutely perfect and will be using/recommending them to anybody that needs good hvac work.Thanks Guys!!! Elaine A2025-08-22 Nixon was super helpful and did excellent work for a reasonable price. The previous owner of the house needed the furnace fixed and only did the bare minimum so Nixon was honest about how it might give us problems during the winter so we went ahead and got a whole new setup. Very happy with the service provided and highly recommend Fireside! Ravi Patel2025-07-24 It’s good Todd Wiseman2025-07-23 Don't think there is a better HVAC company in the Denver area right now. Great work at a reasonable price and very timely and responsive. Installed a new AC unit. Highly recommended. Update: had them back for a furnace replacement in another house with a 40+ year old unit that was end of life about a year later. Same great experience. Update: 3rd AC / furnace unit in a year. Had it up and going super quick. Could not be more happy. Pics to show the quality of work done. Update: Just did a new furnace to replace a very old one in a condo, and also a cleaning service for an existing 2012 Amana AC Unit. Nixon replaced some insulation that went bad to make it work more efficiently Service went well as always - very prompt - and communication was excellent. His customer service system always works great too in letting me know when jobs are started and done without even asking. Recommended.... Paul Zwiebel2025-07-23 Responsive, diligent, professional. Communicates well. Steven Betts2025-07-23 Fireside was prompt, courteous, and professional. Didn’t try to oversell and quickly fixed my problem. Highly recommend them! David Moore2025-07-09 Fireside put in a new hvac and furnace for me. The cost was well under competitors for the same brands, and the service was excellent. You can pay a premium to work with a big company just looking to put you through their revenue engine if you want, but with Fireside you get people obsessed with their trade, rapidly responsive and willing to go the extra mile for quality and service. Highly recommended. Jody Kuhns2025-07-02 Nixon was amazing. He answered every call and got me accurate information quickly. He did not try to upsell me something I did not need. He did a spectacular job for a reasonable price. Super honest, professional and dependable!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. We’ll 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 we’ll 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 we’ll discuss product choices transparently, explaining the process step by step so you can make informed decisions.
Get a Quote
We’ll 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?
Signs you may need a new air conditioner include frequent breakdowns, rising energy bills, inconsistent cooling, and the unit being over 10–15 years old. If repairs are becoming costly or ineffective, replacement might be more economical. Fireside Heating and Cooling offers expert assessments to guide your decision.
How do I choose the right AC unit for my home?
Selecting the right AC involves considering your home’s size, insulation, and climate. Fireside Heating and Cooling can perform a load calculation to recommend an appropriately sized unit, ensuring optimal efficiency and comfort. Factors like energy efficiency ratings and features should also be considered.
Are there financing options available?
Yes, Fireside Heating and Cooling offers flexible financing options for AC installations. These plans are designed to make your investment more manageable, with various terms and interest rates to suit your budget. Contact us to explore the best option for you.
Do you offer emergency AC installation services?
Fireside Heating and Cooling provides emergency AC installation services to ensure your home remains comfortable during unexpected breakdowns. Our team is available 24/7 to handle urgent installation needs promptly and professionally.
How can I schedule an AC installation?
Scheduling an AC installation with Fireside Heating and Cooling is simple. You can call our office directly or visit our website to request a free quote. Our team will assist you in selecting the right unit and scheduling a convenient installation time.
How long does AC installation take?
The duration of AC installation varies based on the complexity of the system and your home’s requirements. On average, a standard installation takes about 4–8 hours. Fireside Heating and Cooling ensures efficient and timely installations with minimal disruption to your daily routine.
What is the best time of year to install a new air conditioner?
The best times to install a new air conditioner are during the spring or fall. These seasons typically offer milder temperatures, allowing for more comfortable working conditions and potentially lower installation costs due to reduced demand.
How do I know if my current AC unit is the right size for my home?
An improperly sized AC unit can lead to inefficiency and discomfort. Fireside Heating and Cooling can perform a load calculation to determine if your current system is appropriately sized for your home’s cooling needs. This assessment ensures optimal performance and energy efficiency.
How long will my new air conditioner last?
With proper maintenance, a new air conditioner can last between 10 to 15 years. Regular servicing, such as annual tune-ups and timely repairs, can extend the lifespan of your unit, ensuring consistent performance and comfort.
What type of warranty do you offer on AC installations?
Fireside Heating and Cooling offers comprehensive warranties on all new AC installations. These warranties typically cover parts and labor for a specified period, providing peace of mind and protection against potential defects or issues. Specific terms vary by manufacturer and model.