How do I know if I need a new furnace or just repairs?

If your furnace is 15+ years old, needs frequent service, or isn’t heating evenly, replacement may be the smarter choice. We’ll help you weigh your options.

What furnace brands do you install?

We install trusted brands including Lennox, Trane, Carrier, and Rheem—systems proven to perform in Colorado winters.

How long does a furnace installation take?

Most installations are completed in a single day. More complex projects may take a little longer, but we’ll set clear expectations.

Are there rebates or incentives for a new furnace?

Yes. We help Littleton homeowners access utility rebates and energy efficiency incentives to reduce upfront costs.

Do you offer financing for furnace replacement?

Yes. We have financing options available with approved credit to make your furnace installation more affordable.

Furnace Installation & Replacement in Littleton, CO

Littleton sits close enough to the foothills that our winters bring a mix of dry cold, sudden wind gusts, and temperature drops that can catch any furnace off guard. At Simply Mechanical, AC, Furnace & Boiler Repair, we’ve spent over 30 years helping local families stay warm through it, no matter what the season throws our way. If your furnace is struggling to keep up or you’re simply ready for something more efficient, our NATE-certified team is here to help you find the right system for your home.

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What Your Neighbors Are Saying About Us

Warning Signs Your Furnace Is Failing

Furnaces usually give off a few warning signs before they fail completely. Catching these early can mean the difference between a planned upgrade and an emergency call on the coldest night of the year.

Climbing utility bills
Constant repair visits
Cold or uneven rooms
Banging or rattling sounds
System older than 15 years
Weak or yellow flame
Dry air or excess dust

If your furnace is showing any of these signs, it’s a good idea to have a technician take a look before winter fully hits.

How Many Years Should a Furnace Last

Most furnaces are built to last somewhere between 15 and 20 years, though real world lifespan depends a lot on maintenance and how often the system runs. Littleton’s elevation and dry air mean furnaces here often log longer run times per season than furnaces at lower altitudes, which adds extra strain over the years.

Homes in some of Littleton’s older neighborhoods, especially those with original ductwork, tend to see furnaces wear out sooner, particularly if the system was never sized correctly for the home. Staying on top of maintenance can add years to a furnace’s life, but every system eventually reaches a point where repairs stop making financial sense. Once your furnace passes the 15 year mark, it’s worth starting to plan for replacement rather than waiting for a breakdown to force the decision.

Choosing the Right Furnace for Your Home

We offer a range of furnace options built to fit different homes, budgets, and efficiency needs. Standard efficiency furnaces are a reliable, budget friendly option for homeowners who want dependable heat without a large upfront cost. High efficiency models cost more to install but can lower monthly energy bills noticeably, which adds up over a Littleton winter where furnaces run often.

We also install two stage and variable speed furnaces, which adjust their heat output based on what your home actually needs at any given moment. These systems tend to run quieter, distribute heat more evenly, and handle sudden temperature swings better than standard single stage units. Our technicians will talk through your options with you and recommend a furnace based on your home’s size, insulation, and typical heating patterns.

Our Step by Step Installation Process

We start every project with an in-home visit to evaluate your current system, ductwork, and heating needs. Our technicians measure your home’s square footage and take note of details like ceiling height and window placement before recommending furnace size. This step is more important than most homeowners realize, since a furnace that’s too big or too small for the home can lead to higher bills and a shorter equipment lifespan.

Once you’ve selected a furnace, we schedule installation around your availability. Most replacements are finished in a single day. Our team protects your home throughout the process, from covering floors to properly removing your old unit, and we test the new system fully before we consider the job done. Before we leave, we walk you through your new thermostat and any features specific to your furnace.

We also take care of any required permitting and make sure the installation meets local building codes. Our goal is to leave your home in better shape than we found it, with a furnace ready to handle whatever Littleton weather comes next.

The Simply Mechanical Difference

Picking the right team for your furnace installation matters just as much as picking the right furnace. Here’s what Littleton homeowners can expect when they choose us.

Honest, upfront pricing
NATE-certified technicians
On-time arrival, always
Clean and respectful service
Fast, flexible scheduling
30+ years serving Denver metro

frequently asked questions

How long does furnace installation usually take?

Most furnace replacements are completed in a single day, though timing can vary depending on ductwork changes or home layout.

Should I repair or replace an aging furnace?

If your furnace is over 15 years old or needs frequent repairs, replacement is usually the more cost effective choice long term.

Is a permit required for furnace replacement?

Yes, most furnace installations require a permit, and we handle that process as part of our service.

How do I know what size furnace my home needs?

Furnace size depends on your home’s square footage, insulation, and layout, which is why we complete a full assessment before recommending a system.

Will a new furnace help lower my energy bills?

Yes, upgrading to a high efficiency furnace can noticeably reduce your monthly heating costs compared to an older system.