Heating & Furnace in Boulder - Fast Local Response, Upfront Pricing

Fast, Reliable Heating & Furnace Across Boulder

Heating & furnace repair in Boulder typically runs $150-$700, with most calls completed same-day by our Heating & Furnace team. Furnace replacement in Boulder generally costs $3,500-$7,500, including proper altitude derating for our 5,430-foot elevation. Call Fireside Heating & Air Co. at (866) 561-3358 for upfront pricing and a free estimate.

Call (866) 561-3358

We’ve been answering calls from Boulder homeowners since 2018. Our technicians know the difference between a Table Mesa ranch with a 1980s Carrier and a University Hill duplex still running its original 1960s floor furnace. Boulder isn’t Denver, and it isn’t Longmont. The altitude, the Chinook winds tearing down from the Flatirons, the aging rental stock around CU - these factors change how a furnace fails and how it needs to be fixed. When your heat goes out at midnight in January, you want someone who understands that Boulder’s mountain-front climate punishes equipment differently than anywhere else on the Front Range.

Why Fireside Heating & Air Co. Is Boulder’s Preferred Heating & Furnace Company

Fireside has served Colorado’s Front Range for over 8 years, and Boulder has been central to our work from the start. We’ve replaced heat exchangers in Chautauqua cottages, derated systems for altitude in upper Mapleton Hill Victorians, and walked landlords through SmartRegs compliance in Whittier rentals. Our technicians are journeyman-trained, background-checked, and uniformed - they put on shoe covers without being asked.

Our phones are answered by a live person, 24 hours a day, 7 days a week. That includes 2 a.m. on a Saturday when the Chinook drops and your furnace won’t restart. No voicemail tree. No “press 1 for service.” A real person who can dispatch a technician to Boulder within the hour.

Every repair and installation is backed by our 90-Day Done Right Promise - written, no paperwork, no arguing. The price we quote is the price you pay. We apply the Keystone Standard to everything we touch: Krafted right, Every time, Your home first, Standing behind it.

Current offers for Boulder homeowners: $50 off any repair over $250, free second opinion on any written estimate, $89 seasonal tune-up, and a permanent 5% Senior & Veteran discount.

Our Heating & Furnace Services in Boulder

Furnace Repair

Boulder’s Chinook winds are notorious for a reason. We’ve seen January afternoons hit 65°F, then watched thermometers plunge below freezing by midnight. That kind of thermal cycling finds every weakness in a furnace. Heat exchanger micro-cracks that might hold steady in a stable climate open under the stress. Ignitors that were marginal fail on the third hard start of the night. We carry common ignitors, gas valves, and control boards for Carrier, Trane, Bryant, and American Standard systems on every truck, so most Boulder repairs finish in a single visit.

We serviced a 1960s gas furnace in a University Hill rental after a Chinook event; the rapid 45°F swing cracked the heat exchanger. We replaced it with a Carrier 96% AFUE unit derated for Boulder’s altitude. The landlord hasn’t called back in three winters. That’s how we want it.

Furnace Replacement

When repair costs approach half the value of a new system, we give you straight talk about repair versus replace. In Boulder, replacement isn’t just about swapping boxes. Every gas furnace must be altitude-derated - roughly 4% capacity loss per 1,000 feet above sea level. At 5,430 feet, that matters. An improperly derated furnace runs rich, wastes gas, soots up, and creates carbon monoxide risk. Our technicians calculate Manual J loads at elevation, specify the correct orifice and gas pressure settings, and document everything in writing.

We’ve replaced gravity systems in Mapleton Hill, floor furnaces in Whittier, and countless 80% AFUE units from the 1990s in Table Mesa. Most replacements complete in one day. We haul away the old unit. You get the 90-Day Done Right Promise and a system you won’t have to think about.

Furnace Tune-Up

Boulder’s dry air and dust from the foothills mean filters load faster than in humid climates. Our $89 seasonal tune-up includes combustion analysis at altitude, heat exchanger inspection with camera scope, gas pressure verification, and filter sizing check. We catch cracked exchangers before the Chinook winds expose them. We catch failing ignitors before the first sub-zero night. For homeowners in 80321, 80322, 80323, and 80328, we schedule tune-ups with arrival windows we honor.

Heat Exchanger Replacement

This is where Boulder’s climate truly separates from the rest of Colorado. The mountain-front location means rapid temperature swings that stress heat exchangers like nowhere else. A cracked exchanger is a safety issue - carbon monoxide can enter your living space. We don’t patch. We replace, with proper altitude derating and combustion verification. Heat exchanger replacement in Boulder typically runs $1,500-$3,000, depending on furnace accessibility and whether the blower assembly also needs attention. We give you the price before we start.

Trusted Brands We Service in Boulder

Our technicians are trained to journeyman standard on nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We stock common parts for Bryant, American Standard, and Carrier on Boulder-area trucks, which means faster turnaround on repairs. For older systems - and Boulder has plenty - we source hard-to-find components through our wholesale network rather than telling you a discontinued board means full replacement. If your 1995 Trane can be fixed honestly, we’ll fix it. If it’s past honest repair, we’ll show you why and give you a replacement price that doesn’t change.

Common Heating & Furnace Problems We See in Boulder Homes

• Heat exchanger cracking from Chinook thermal cycling. The west-side neighborhoods closest to the Flatirons - Table Mesa, Chautauqua, upper Mapleton Hill - see heat exchanger failure calls spike during and immediately after major Chinook wind events. Rapid outdoor temperature swings of 40-50°F in hours put extraordinary stress on furnaces already running hard all night.
• Altitude-related improper derating causing incomplete combustion. We’ve found furnaces in Boulder installed by out-of-market contractors who never adjusted for 5,430 feet. The result is sooting, yellow flame, elevated carbon monoxide, and premature failure. Proper derating is not optional here.
• Legacy floor-furnace or gravity-system part obsolescence. University Hill and Whittier still have homes with gravity furnaces from the 1950s and floor furnaces from the 1960s. Parts are discontinued. We evaluate whether creative repair is possible, but often these systems need full retrofit to modern forced-air with proper duct design.
• SmartRegs compliance failures in rental properties. Boulder’s rental efficiency ordinance and Building Performance Ordinance require landlords to meet efficiency standards. We’ve helped numerous property owners navigate furnace upgrades that satisfy city inspection without overbuilding the system.

Heating and Cooling in Boulder, Done Right

Denver Metro winters start sharp and summers climb fast. Your furnace works hard at altitude, and that first heat wave tests every builder-grade AC that came with the tract house. Fireside keeps Boulder homes steady through both, with journeymen who size the fix honestly, tape the boot seams, and leave the thermostat where they found it.

We named this company for the warmest word in the American memory because that’s the feeling we deliver, backed by our 90-Day Done Right Promise in writing. we coordinate through our Denver Metro service area Same-day service when the season turns. Ask about our $89 seasonal tune-up.

Pricing for Heating & Furnace in Boulder, CO

We Also Serve Cities Near Boulder

Our Heating & Furnace in Boulder coverage extends throughout the northwest metro area. We regularly dispatch to Lafayette, Broomfield, Longmont, and Arvada with the same live-answer phones, same journeyman technicians, and same 90-Day Done Right Promise. Altitude and climate considerations vary by location - we’ll tell you honestly if your specific address changes our recommendations.

FAQs - Heating & Furnace in Boulder