Furnace Replacement / Installation
Gas Furnace Replacement & Installation in Highlands Ranch
Upgrade your homeās heating with our professional gas furnace replacement and installation services. We provide expert guidance and quality installation to ensure your new furnace operates efficiently and effectively, keeping your home warm for years to come.

Expert Consultation
We help you choose the right furnace for your home, considering efficiency, size, and budget to ensure optimal comfort.

Seamless Installation
Our certified technicians handle the entire installation process with precision, ensuring your new furnace runs smoothly from day one.
Warmth That Lasts
Professional Furnace Installation
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 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?
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 Itās 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. Didnāt 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 Replacement/Installation
Upgrade to a more efficient air conditioning system with our professional installation services. Weāll help you find the perfect unit for your home.

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 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.
Frequently Asked Questions
What factors should I consider when choosing a new furnace?
When selecting a new furnace, consider factors like energy efficiency, system size, fuel type, brand reputation, and warranty. Fireside Heating and Cooling offers expert guidance to help you choose the right furnace tailored to your home’s needs and budget.
How long does a furnace installation take?
Furnace installation typically takes one day, depending on the system and home layout. Fireside Heating and Cooling ensures a smooth, efficient installation process to minimize downtime and quickly restore your comfort.
Do you offer financing options for furnace replacement?
Yes, Fireside Heating and Cooling offers flexible financing options for furnace replacements. We provide HVAC services with no money down and affordable monthly payments, making it easier for you to upgrade your heating system without financial strain.
How do I know if my furnace needs replacement or just repair?
If your furnace is over 10ā15 years old, requires frequent repairs, or struggles with efficiency, replacement may be the better choice. Fireside Heating and Cooling helps homeowners weigh repair costs against long-term savings with a new, energy-efficient system.
What is the average cost of furnace replacement?
The cost of furnace replacement varies based on factors like system size, brand, and installation complexity. Fireside Heating and Cooling provides transparent pricing and free estimates to help you understand the investment required for a new furnace.
What brands of furnaces do you install?
Fireside Heating and Cooling installs top-quality furnace brands, including American Standard, known for their reliability and efficiency. Our team helps you select the best brand and model to suit your home’s heating needs and budget.
Is there a warranty on new furnace installations?
Yes, Fireside Heating and Cooling offers warranties on new furnace installations, providing peace of mind and protection for your investment. We ensure that your new system operates efficiently and reliably for years to come.
Do you provide maintenance services for newly installed furnaces?
Yes, Fireside Heating and Cooling offers comprehensive maintenance services for newly installed furnaces. Regular maintenance helps ensure optimal performance, extends the lifespan of your system, and prevents unexpected breakdowns.
How can I schedule a furnace replacement consultation?
To schedule a furnace replacement consultation with Fireside Heating and Cooling, you can call us at (303) 506-9716 or visit our website to request a free quote. Our team will assist you in selecting the best system for your home.
When should I consider replacing my furnace?
Consider replacing your furnace if it’s over 10ā15 years old, requires frequent repairs, or is inefficient. Fireside Heating and Cooling helps homeowners evaluate their current system and determine if replacement is the most cost-effective solution for long-term comfort.
What areas do you serve?
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.

