Lone Tree Has Specific Needs. We Get That.
Lone Tree is not a typical Denver suburb. The homes are newer, the neighborhoods are well-planned, and the expectations are higher. Residents here have invested significantly in their properties, and they expect the people they hire to show up prepared, work cleanly, and get things right without a lot of back-and-forth.
That’s the standard we hold ourselves to at Fireside Heating & Cooling.
Lone Tree sits at the southern edge of the metro, where summer heat combines with the exposure of newer construction that sometimes prioritizes aesthetics over insulation. Big windows. Open floor plans. Vaulted ceilings. These are beautiful features that also happen to make a home harder to cool efficiently. We’ve worked in enough Lone Tree homes to know exactly what we’re walking into, and we plan accordingly.
What We Offer Lone Tree Homeowners
New construction doesn’t always mean new AC. Plenty of Lone Tree homes are now 15 to 20 years old, which puts their original equipment right at the edge of its useful life. When replacement time comes, we do this properly. That means calculating the actual load your home requires rather than guessing based on square footage alone. It means recommending equipment that fits your lifestyle, your budget, and your home’s construction. And it means installing everything to manufacturer specs so your warranty is valid and your system performs from day one.
Some repairs are quick. A failed capacitor, a tripped float switch, a thermostat that lost its connection. Others take more digging. We handle both. What we don’t do is show up, throw a part at it, and hope for the best. Every repair starts with a real diagnosis, and we explain what we found before we start billing for anything.
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I’ll be straightforward about this one. A tune-up isn’t glamorous. It doesn’t feel urgent until it is. But in my experience, the homeowners who skip annual maintenance are the same ones calling us on the hottest day of August wondering why their system quit. One visit in the spring prevents most of that. We clean the coils, check refrigerant levels, test electrical components, flush the drain line, and make sure everything is calibrated correctly before cooling season arrives.
Lone Tree homes with finished basements, sunrooms, or home offices often have one area that never quite reaches the right temperature. Sometimes the existing system just can’t reach it well. Ductless mini-splits are the cleanest solution in those situations. Efficient, quiet, and controllable independently from the rest of the house. We install and service them regularly throughout the area.
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The Thing About Newer Homes Nobody Talks About
There’s a common assumption that newer homes are easier to cool. Sometimes that’s true. But Lone Tree’s construction boom from the late 90s through the 2010s produced a lot of homes with features that create real HVAC challenges.
Tall ceilings trap heat up high. West-facing windows collect afternoon sun for hours. Open layouts make zoning difficult. And builder-grade HVAC equipment, which was standard in a lot of these developments, was sized to meet code minimums rather than optimized for long-term efficiency.
Fifteen years in, that equipment is aging. The homes have settled. Ductwork connections that were loose from the start have gotten looser. These are the things we look for. Not to create problems where there aren’t any, but because understanding a home’s full picture is how we make sure whatever we do actually sticks.
How to Tell Your System Needs Attention
Most AC failures send signals before they happen. Here are the ones worth taking seriously:
- Your home takes noticeably longer to cool down than it used to on similarly hot days
- Certain rooms, particularly those with high ceilings or west-facing windows, stay warm regardless of what the thermostat says
- You hear the system short-cycling, meaning it kicks on and off in quick succession rather than running full cooling cycles
- Condensation or water is showing up near the air handler or in the ceiling above it
- Your electric bills have climbed steadily without a clear reason
- The system is running but the air coming from the vents doesn’t feel as cold as it should
None of these automatically mean catastrophe. But all of them mean something. Better to find out what before the problem compounds.
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
Frequently Asked Questions
Lone Tree homes are relatively new. Do they really need AC maintenance already?
How do I know if my ductwork is part of the problem?
What efficiency rating should I look for when replacing my AC?
SEER2 ratings are the current standard. For a Lone Tree home that runs the AC heavily from May through September, a higher efficiency unit typically pays for itself in energy savings within a reasonable timeframe. That said, the right answer depends on your specific home, how long you plan to stay, and your monthly energy priorities. We’ll walk you through the math rather than just pushing the most expensive option.
Is it normal for my AC to run almost constantly on very hot days?
On days above 95 degrees, some continuous running is expected. Your system is designed to maintain a temperature roughly 20 degrees below the outdoor temperature, so extreme heat means extended run times. What’s not normal is continuous running on a mild 85-degree day, or a system that runs constantly but never reaches the set temperature. That points to a sizing issue, a refrigerant problem, or significant duct loss.
How far in advance should I schedule a spring tune-up?
Do you service all AC brands?
Ready When You Are
Lone Tree homeowners take care of their homes. We take care of the systems that keep those homes comfortable. It’s a straightforward relationship, and one we take seriously.
Whether you’re scheduling a tune-up before the summer heat arrives, dealing with a system that’s been acting up, or thinking through whether it’s time to replace aging equipment, Fireside Heating & Cooling is ready to help.
Call us or book online today. We serve Lone Tree and the surrounding south Denver metro with licensed technicians, honest assessments, and service that holds up long after we leave.
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.
