Fast, Reliable Emergency & Commercial HVAC Across Boulder
Emergency HVAC repair in Boulder typically runs $150-$700 for same-day furnace or AC fixes, and our Emergency & Commercial HVAC crew dispatches to Boulder within 90 minutes during heating or cooling emergencies. We’re the company that answers at 2 a.m. when your heat exchanger cracks during a January Chinook wind event, and we’re the ones who understand that a rooftop unit on Pearl Street can’t wait until morning. Call (866) 561-3358 - a live person picks up, every time.
We’ve worked Boulder for decades. Glen Hartman founded Fireside Heating & Air Co. back in 1984, and our technicians know the difference between a Table Mesa hillside install and a Whittier rental retrofit. The Flatirons aren’t just scenery here. At 5,430 feet, every gas furnace loses roughly 4% capacity per 1,000 feet of elevation, and AC systems struggle with derated performance that Denver contractors rarely encounter. We account for that before we quote. We also know that Boulder’s alley-loaded commercial buildings, tight townhome clearances, and security-conscious multi-family properties demand equipment that fits where standard units won’t, and technicians who show up prepared for constrained access and parking logistics.
Why Fireside Heating & Air Co. Is Boulder’s Preferred Emergency & Commercial HVAC Company
Forty-two years in this trade means we’ve seen what Boulder’s mountain-front climate does to heating and cooling systems. The Chinook downslope winds that slam the west-side neighborhoods - Chautauqua, upper Mapleton Hill, the streets climbing toward Flagstaff - can swing outdoor temperatures fifty degrees inside a single January day. That thermal whiplash cracks heat exchangers in older furnaces and sends our emergency call volume spiking. We know the pattern. We stock the parts. We don’t learn Boulder on your dime.
Our reputation here is built on showing up when we say and quoting what you’ll pay. The 90-Day Done Right Promise covers every job in writing - if it’s not right, we make it right, no paperwork, no arguing. That’s the Keystone Standard, and it’s why long-tenured Boulder homeowners, the ones who’ve lived in the same house on The Hill or in Newlands for twenty-plus years, keep our number posted by the phone.
Calls are answered by a live person, 24 hours a day, 7 days a week, including holidays. Nights, weekends, and those 2 a.m. no-heat emergencies that always seem to hit during a cold snap after a Chinook. No voicemail tree. No “press one for service.” A real person who can dispatch a background-checked, uniformed technician - someone who puts on shoe covers without being asked and treats your home like their mother’s.
Most jobs finish in a single visit. Our trucks carry inventory for nine major brands - Bryant, American Standard, Carrier, Trane, and five others - because Boulder customers shouldn’t wait for a parts run to Denver while their tenants or their family shivers.
Our Emergency & Commercial HVAC Services in Boulder
24/7 Emergency HVAC
Boulder’s mountain-front location creates emergency patterns you won’t find in flatland Colorado. We responded to an emergency call at a University Hill rental property where a 20-year-old Bryant gas furnace had a cracked heat exchanger, detected during a Chinook wind event. Our crew replaced it with an altitude-derated Carrier 96% AFUE model and upsized the return duct to meet Manual J requirements. That’s the kind of field knowledge that matters when it’s 10 p.m. and your system just failed. Our emergency line - (866) 561-3358 - connects you to a live dispatcher who understands Boulder’s ZIP codes: 80321, 80322, 80323, 80328, and everything in between.
Commercial HVAC
Boulder’s commercial core - Pearl Street, the Twenty Ninth Street corridor, the research parks along the Diagonal - mixes historic buildings with modern construction, and neither forgives a generic approach. The city’s SmartRegs rental efficiency ordinance and Building Performance Ordinance create sustained retrofit pressure on landlords to bring aging systems up to current standards. We design commercial replacements that meet those codes without overbuilding, and we quote upfront: the price given is the price paid. No change orders hiding in the fine print.
Rooftop Unit Service
Rooftop units on Boulder’s commercial buildings suffer uniquely. Rapid temperature swings from Chinook events cause refrigerant line contraction and expansion that produces leaks undetectable in stable climates. Compressors work harder. Electrical connections fatigue faster. Our technicians service Carrier, Trane, and other major RTU brands with parts on the truck, and we understand the access constraints of alley-loaded buildings downtown where crane placement and staging require planning that out-of-town crews rarely consider.
Chiller Service
Boulder’s research and medical facilities, plus larger commercial installations, depend on chillers that can’t tolerate downtime. We handle chiller diagnostics, refrigerant recovery, and compressor assessment with the same upfront pricing and single-visit efficiency that defines our residential work. At elevation, every BTU matters more - we don’t waste them.
Annual Maintenance
Boulder’s 300-plus days of sun and low relative humidity create a maintenance profile distinct from humid climates. Pre-season tune-ups catch heat exchanger stress before Chinook season, verify altitude-derated combustion, and ensure evaporative cooler conversions aren’t fighting undersized ductwork. Our $89 Seasonal Tune-Up includes full inspection, filter check, and written condition report - the kind of documentation that satisfies SmartRegs inspectors and protects your warranty.
HVAC Inspection
Real estate transactions, rental turnovers, and SmartRegs compliance all demand thorough documentation. We inspect to code, photograph findings, and deliver written reports that hold up in negotiations and regulatory review. No vague hand-waving. Specific conditions, specific recommendations, specific costs.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Boulder
We train our technicians as journeymen on nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Boulder customers, that means we stock common parts locally rather than ordering from Denver and hoping for next-day delivery. A Carrier rooftop unit on Pearl Street, a Bryant furnace in Table Mesa, an American Standard heat pump in Newlands - we’ve worked on all of them, repeatedly, and we know the failure modes each model develops at 5,430 feet. Fast turnaround isn’t a slogan here. It’s having the right contactor, the right board, the right ignitor on the shelf when your system fails at midnight.
Common Emergency & Commercial HVAC Problems We See in Boulder Homes
- Chinook wind thermal cycling cracks heat exchangers in older furnaces. The rapid 40-50°F temperature swings in west-side neighborhoods like Table Mesa and Chautauqua stress heat exchangers that were already running hard all night. A crack that would go unnoticed for weeks in stable climates announces itself quickly under Boulder’s mountain-front wind cycles, often with carbon monoxide risk.
- Evaporative cooler conversions to refrigerant AC fail due to altitude and ductwork. Many pre-1990 Boulder homes ran evaporative coolers, and converting those systems to refrigerant-based AC requires Manual J recalculation at elevation. Undersized ductwork that moved moist swamp-cooled air cannot handle the static pressure of refrigerated air, and capacity loss at 5,430 feet means the replacement unit must be sized differently than sea-level tables suggest.
- Rooftop units on commercial buildings leak refrigerant during rapid temperature swings. Boulder’s Chinook events cause refrigerant lines to expand and contract aggressively, producing leaks at flare fittings and vibration points that flatland technicians rarely encounter. Compressors then run undercharged, overheat, and fail catastrophically if not caught early.
- Original ductwork in University Hill and Whittier rentals cannot meet modern zoning or efficiency standards. The 1950s-1970s wood-frame rentals surrounding CU Boulder still carry ductwork designed for single-speed furnaces and gravity systems. SmartRegs compliance and tenant comfort both demand retrofit solutions that fit tight structural envelopes without gutting historic interiors.
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.
Heating & Cooling in Boulder
Colorado’s altitude swings and dry winters punish furnaces hard, then the first June heat wave tests every AC that sat idle for eight months. We see it every season: builder-grade units in tract housing aging past their design life, coils clogged from cottonwood season, no-heat calls at 2 a.m. when the temperature drops forty degrees overnight. Our techs are licensed, insured journeymen who give you honest math on repair versus replace, put on shoe covers without being asked, and leave the price where you can read it. we coordinate through our Denver Metro service area
Ask about our $89 seasonal tune-up. Catch the problem before the cold front does.
Heating & Cooling in Boulder
Colorado’s altitude swings and dry winters punish furnaces hard, then the first June heat wave tests every AC that sat idle for eight months. We see it every season: builder-grade units in tract housing aging past their design life, coils clogged from cottonwood season, no-heat calls at 2 a.m. when the temperature drops forty degrees overnight. Our techs are licensed, insured journeymen who give you honest math on repair versus replace, put on shoe covers without being asked, and leave the price where you can read it. we coordinate through our Denver Metro service area
Ask about our $89 seasonal tune-up. Catch the problem before the cold front does.
Pricing for Emergency & Commercial HVAC in Boulder, CO
We believe in straight talk about what things cost. Here’s what typical work runs in the Boulder market:
| Service | Price Range in Boulder |
|---|---|
| AC Repair | $150-$650 |
| Furnace Repair | $150-$700 |
| AC Installation | $3,500-$7,500 |
| Tune-Up | $80-$200 |
Emergency after-hours calls carry no premium markup at Fireside - the price is the price, whether it’s Tuesday noon or Sunday midnight. What moves a job toward the higher end: altitude-derated equipment sizing, ductwork modifications for older Boulder housing stock, refrigerant line sets that must be replaced due to elevation stress, and access complications in tight commercial spaces. We quote every job upfront, in writing, before work begins. No surprises. No “we found something else” add-ons after you’re committed.
Current offers: $50 off any repair over $250. Free second opinion on any written estimate. $89 seasonal tune-up. Senior and veteran discount of 5%, always. Call (866) 561-3358 for an exact quote - estimates are free.
We Also Serve Cities Near Boulder
Our Emergency & Commercial HVAC in Boulder coverage extends throughout the northern Front Range. We regularly dispatch to Lafayette and Broomfield for commercial rooftop service, Longmont for residential furnace replacement, and Arvada for emergency no-heat calls. Same live-answer dispatch, same 90-Day Done Right Promise, same upfront pricing - no matter which city you’re in.
Serving Boulder, CO - Our Local Coverage Area
We’re based in the Boulder area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Emergency & Commercial HVAC in Boulder
Every gas furnace in Boulder loses roughly 4% capacity per 1,000 feet above sea level, meaning a 100,000 BTU unit performs like a 78,000 BTU unit at 5,430 feet. Our technicians derate combustion air and recalculate airflow for every emergency replacement, and we stock altitude-specific orifices and pressure regulators that sea-level contractors rarely carry. Call (866) 561-3358 if your commercial system is underperforming - we’ll diagnose whether it’s an elevation issue or a mechanical failure.
Chinook winds can push January temperatures above 65°F before crashing below freezing overnight, creating 40-50°F swings that cycle furnaces on and off repeatedly. That thermal stress reveals marginal heat exchanger cracks and fatigues controls in ways stable climates never test. Table Mesa, Chautauqua, and upper Mapleton Hill sit closest to the Flatirons and feel these swings most acutely - our call volume from those neighborhoods reliably spikes during and immediately after major Chinook events.
Yes. Boulder’s SmartRegs rental efficiency ordinance and the Building Performance Ordinance both set minimum efficiency standards that can trigger mandatory upgrades during replacement, not just new construction. We design replacements that meet current code thresholds, provide the documentation landlords need for compliance, and never quote equipment that won’t pass inspection. The price we quote includes permit coordination if required.
Conversion requires three things: Manual J load calculation recalibrated for altitude, ductwork assessment for static pressure capacity, and electrical service verification for compressor startup loads. Many pre-1990 Boulder homes have ductwork sized for evaporative coolers that cannot handle refrigerated air without modification. We evaluate the full system, quote the complete job including any ductwork upsizing, and install altitude-derated equipment that actually delivers rated capacity at 5,430 feet. Call (866) 561-3358 for a free assessment.
Access planning is half the job. We survey crane placement, staging areas, and roof loading before dispatching crews, and we carry rigging equipment sized for constrained downtown and University Hill sites where standard boom trucks won’t fit. Our technicians are trained for ladder and roof work with full fall protection, and we coordinate with building management for minimal disruption to tenants and street traffic. For emergency leaks or compressor failures, we often make temporary repairs from interior access points while scheduling permanent replacement with proper equipment access.
Written by Glen Hartman, Owner at Fireside Heating & Air Co., serving Boulder since 2018.