There’s a particular kind of dread that comes on a cold January morning in Arvada when your heating system starts making a sound it definitely wasn’t making last week. Suddenly, a decision that seemed years away is right in front of you: replace what you have, or switch to something different? We’ve been helping Arvada homeowners work through this exact question since 1983, and the honest answer is that the right choice depends far more on the home you already have than on which system wins a general comparison.
Before you budget anything, there’s also something important you should know about the incentive landscape for 2026. A lot of what you might have read online about rebates and tax credits is no longer accurate, and going into a quote expecting those savings can throw your numbers off in a frustrating way. We’ll get to that shortly.
How Boilers and Furnaces Actually Heat Your Home
These two systems accomplish the same goal by moving heat in fundamentally different ways, and that difference shapes everything else about the comparison.
A furnace heats air by passing it over a heat exchanger, then uses a blower motor to push that warm air through ductwork and out of registers into each room. A boiler heats water and circulates it through pipes to radiators, baseboard units, or in-floor radiant tubing. This is known as a hydronic heating system. Heat radiates from those surfaces into the room rather than blowing in from above. Because a boiler moves heat through water instead of air, it doesn’t need ductwork, and it doesn’t circulate dust, pet dander, or other airborne particles the way a forced-air system can, which matters for households sensitive to indoor air quality.
Comfort, Efficiency, & Air Quality in Arvada’s Climate
Arvada sits on the Front Range where the climate is already dry. Forced-air heating cycles on and off throughout the day, pushing warm air through the house without adding any moisture back. Radiant heat from a boiler warms rooms and surfaces steadily without affecting indoor humidity, which many homeowners find noticeably more comfortable through a Colorado winter. Temperature consistency is another real difference: forced-air heat creates blower cycles that can swing room temperature a few degrees between runs, while boiler heat distributes more evenly and holds a steadier temperature throughout the space.
On efficiency, both systems have strong ceilings. High-efficiency gas furnaces can reach up to 98.5% AFUE (Annual Fuel Utilization Efficiency, the share of fuel converted to usable heat), while high-efficiency condensing gas boilers can reach up to 97% AFUE. Neither system has a decisive efficiency advantage at the high end. The model you choose matters more than the category.
What a Boiler or Furnace Upgrade Actually Costs in Arvada Right Now
This is where the conversation gets important for anyone planning a 2026 project, because the incentives that appear on many HVAC comparison pages no longer apply. Xcel Energy discontinued its rebates for high-efficiency gas furnaces and boilers effective January 1, 2026, and the federal Energy Efficient Home Improvement Credit under Section 25C, which had offered up to $600 toward a qualifying furnace or boiler, was terminated for equipment placed in service after December 31, 2025 under the One Big Beautiful Bill Act signed on July 4, 2025. Both of those savings assumptions need to come out of your planning.
That leaves equipment and labor as the primary cost drivers. National figures generally put average furnace installations below average boiler installations in upfront cost, but those averages assume favorable existing conditions. The number that actually matters is what the installation requires beyond the equipment itself.
The Retrofit Factor
If a home has existing ductwork in good condition, swapping in a new furnace is a relatively contained project. If a home already has boiler piping and radiators or radiant floor tubing in place, replacing the boiler unit follows the same logic. Costs shift dramatically when you’re changing systems rather than replacing them.
Adding ductwork to a home that doesn’t have it is a major construction project. Adding pipes, a boiler, and distribution hardware to a fully ducted home is equally significant. Either retrofit adds thousands of dollars to what would otherwise be a straightforward equipment replacement.
Which System Fits the Home You Already Have
For most Arvada homeowners, this is the question that actually settles the decision. Arvada’s housing stock skews newer. The city grew largely from farmland, and the Olde Town Arvada historic district contains the rare pre-1930s structures. The vast majority of homes were built in post-war decades and after, when ducted forced-air systems were standard, meaning most already have ductwork running through the walls and ceilings, often shared with central air conditioning.
When a furnace is already part of a home’s infrastructure and that ductwork also serves the cooling system, replacing the furnace with another furnace is almost always the more practical and cost-effective path. A boiler makes the most sense when a home already has radiators or in-floor radiant tubing. Replacing the boiler unit preserves an infrastructure that’s already working, while converting to forced air would require adding ductwork to spaces that were never designed for it.
Some homeowners are weighing a system change alongside a larger renovation, or they’re dealing with outdated ductwork in poor condition. In those cases, the calculus shifts. A boiler with radiant floor heating in a new addition can make sense even if the rest of the house runs on forced air. A ductless mini-split might also enter the conversation for additions or rooms where running ductwork would be impractical. These hybrid situations are worth talking through with a technician who can look at the specific layout and infrastructure of your home before any decision gets made.
Making the Right Call for Your House
A boiler isn’t objectively better than a furnace, and a furnace isn’t objectively better than a boiler. Both can heat an Arvada home efficiently and reliably. The real question is which system works with the infrastructure your home already has, because that single factor shapes the true cost, the installation timeline, and the long-term practicality of your choice. With the Xcel Energy rebates gone and the Section 25C credit expired, there’s less financial cushion to absorb the cost of a system switch that turns out not to fit the home. Our NATE-certified technicians at Coffman & Company can walk through your existing setup and provide a free estimate that reflects what your specific house actually needs. Give us a call at (720) 600-6887.