Annual Service & Tune-Up
Combustion analysis, pressure verification, expansion tank test, low-water cutoff test, circulator inspection, and full system bleed. Once a year keeps your boiler running reliably.
High-Efficiency Boilers: Worth The Upgrade?
If your home was built before the mid-1990s, your boiler is almost certainly a standard 80-85% AFUE unit — meaning 15-20% of the fuel you pay for goes up the chimney. Modern high-efficiency condensing boilers achieve 90-98% AFUE by capturing heat from exhaust gases that older boilers waste.
How Condensing Boilers Work
A condensing boiler has a secondary heat exchanger that pulls additional heat out of the exhaust before it leaves the home. The water vapor in the exhaust condenses into liquid (which is where the name comes from), giving up its latent heat to the heating water. The cooled exhaust is then vented through PVC pipe — no chimney required.
Benefits of High-Efficiency Boilers
- 15-25% lower heating bills compared to standard 80% AFUE boilers
- PVC venting means flexible installation locations — no need to be near a chimney
- Modulating burners match heat output to demand, improving comfort and efficiency
- Smaller, lighter units — typically wall-mounted, freeing floor space
- Federal tax credits and Xcel Energy rebates available for qualifying high-efficiency installations
- Quieter operation than older atmospheric units
Boiler Replacement Cost in Colorado
A new residential boiler installation in Colorado typically runs $6,000-$15,000 fully installed:
- Standard cast-iron boiler ($5,000-$8,000): proven technology, long lifespan, lower upfront cost, but lower efficiency
- High-efficiency condensing boiler ($8,000-$15,000): higher upfront cost, but lower operating costs and federal/utility rebates
- Combi-boiler ($9,000-$14,000): single unit handles both space heating and domestic hot water — a great option for smaller homes
Right-sizing matters more than picking the most expensive unit. An oversized boiler short-cycles, wears out faster, and costs more to run. We perform a heat-loss calculation to size the new unit to your actual home — not to the inflated BTU rating of the old boiler that was almost certainly oversized when it was installed.
Signs Your Boiler Needs Attention
- Pressure gauge keeps climbing or dropping — expansion tank failure or auto-feed valve issue
- Relief valve dripping or discharging — never normal; indicates a pressure or expansion tank fault
- Knocking, banging, or kettling sounds — scale buildup or air in the system
- One zone cold while others are warm — zone valve, thermostat wiring, or air-locked loop
- Repeated lockouts on the control board — flame, ignition, or sensor issue
- Yellow or orange flame instead of blue — combustion problem, possible carbon monoxide risk
- Boiler over 20 years old — worth a replacement conversation; new units pay back through fuel savings
- Rising heating bills — efficiency declining; service or replacement needed
No Heat Right Now?
In a Colorado winter, a dead boiler isn't something to wait on. Call 303-253-7246 any hour — we keep parts for common boiler repairs on the truck and can usually have your heat back the same visit.
Boiler vs Furnace: What Colorado Homeowners Should Know
Boilers and furnaces both heat homes, but they work very differently:
Boilers (Hydronic Heat)
- Heat water that circulates through radiators, baseboards, or radiant floor tubing
- More even, comfortable heat — no blowing air, no temperature swings
- No air filters, no ductwork to clean
- Typically last 20-30+ years
- Higher initial cost; harder to retrofit central air conditioning
Furnaces (Forced Air)
- Heat air that's distributed through ducts
- Faster temperature recovery; can integrate with central A/C
- Lower initial cost
- Typical lifespan 15-20 years
- Air can feel dry; ductwork can leak and reduce efficiency
Many Colorado homes built before 1970 have boilers — and many homeowners replace them with new boilers because the comfort difference is significant. We can help you evaluate whether sticking with hydronic heat or converting makes more sense for your home.
Denver Metro Service Area
We provide boiler service, repair, and installation across the Denver metro and nearby communities, including:
Denver Metro: Denver, Aurora, Lakewood, Westminster, Thornton, Arvada, Wheat Ridge, Englewood, Littleton, Commerce City, Broomfield, Northglenn, Centennial, Highlands Ranch, Parker, Castle Rock, Greenwood Village, Cherry Hills Village.
Boulder & North: Boulder, Longmont, Louisville, Lafayette, Erie, Superior.
Frequently Asked Questions About Boilers
How much does a new boiler cost in Colorado?
A new residential boiler typically costs $6,000-$15,000 fully installed. Standard cast-iron boilers run $5,000-$8,000; high-efficiency condensing boilers run $8,000-$15,000. We provide free quotes after a site assessment.
How long does a boiler last?
A well-maintained residential boiler typically lasts 20-30 years. Cast iron boilers can last 30-50 years. High-efficiency condensing boilers average 15-20 years. Annual service is essential.
What is a high-efficiency or condensing boiler?
A condensing boiler captures heat from exhaust gases that traditional boilers waste, achieving 90-98% AFUE compared to 80-85% for standard boilers. They use PVC venting and typically save 15-25% on heating bills.
Why is my boiler making noise?
Kettling means scale buildup; banging usually indicates air in the system; whistling can be a circulator issue; gurgling typically means low pressure or air in radiators. Most are diagnosable and repairable.
Should I replace my boiler or repair it?
Consider replacement if your boiler is over 20 years old, repair costs exceed 50% of replacement cost, your heating bills are rising, or you're having repeated breakdowns.
What's the difference between a boiler and a furnace?
A boiler heats water that circulates through radiators or radiant floors (hydronic heat). A furnace heats air distributed through ducts. Boiler heat is more even and comfortable; furnaces are cheaper to install but use ductwork.
Do you offer emergency boiler repair?
Yes — 24/7 emergency boiler repair across the Denver metro. We carry common boiler parts on the truck and can usually diagnose and repair common failures on the first visit.
How often should my boiler be serviced?
Once a year, ideally in the late summer or early fall before heating season. Annual service catches small problems before they become emergencies and protects manufacturer warranty terms.