High-Efficiency
Condensing Boilers
Condensing boilers extract more heat from combustion gases — delivering up to 95%+ AFUE efficiency and significantly lower gas bills. D's Air & Heating, Inc. installs and services condensing systems throughout Chicago.
IL License #2183457 · D's Air & Heating, Inc. · 549 N Monticello Ave, Chicago, IL 60624
How Condensing Boilers Work
Standard boilers exhaust hot flue gases — wasting energy. Condensing boilers capture that heat by cooling the exhaust gases until water vapor condenses, extracting additional energy before it leaves the system.
The result is efficiency ratings up to 95%+ AFUE — compared to 80% for a standard boiler. For Chicago homeowners with high gas bills, the payback period on a condensing upgrade is typically 5–8 years.
Condensing boilers are ideal for radiant floor heating, where lower water temperatures maximize the condensing effect. They also pair well with outdoor reset controls that automatically adjust output based on outdoor temperature.
Key Features & Benefits
- Up to 95%+ AFUE efficiency — significantly lower gas bills
- Stainless steel heat exchangers for long-term durability
- Outdoor reset controls — adjusts output to outdoor temperature
- Perfect pairing for radiant floor heating systems
- Modulating burner — precise, quiet operation
- Full permit pulling and Chicago code compliance
Brands We Install
Lennox
GCWB95 condensing boiler — up to 95% AFUE
Navien
Combi condensing boiler — heat + hot water
Noritz
High-efficiency condensing combi units
Weil-McLain
ECO Tec condensing series
Our Condensing Boiler Assessment Process
We evaluate your existing system and home before recommending a condensing upgrade — so you get the right system for your specific situation.
System Assessment
Evaluate existing boiler, piping, and whether the home is compatible with condensing technology.
Safety Check
Gas shutoff, pressure relief valve, condensate drain, and CO detector verification.
Visual Inspection
Heat exchanger, condensate trap, venting, and piping condition.
Operational Test
Ignition, modulation, condensate production, and heat distribution.
Efficiency Analysis
Compare current system efficiency vs. condensing replacement — projected savings.
Options Presented
Repair vs. condensing upgrade — with upfront pricing before any work begins.
Typical Pricing Ranges
All pricing includes labor, permits, and startup. Final price confirmed before work begins. $95.36 diagnostic fee applied toward repair if you proceed same day.
What Chicago Homeowners Say
Gas Bill Dropped Immediately
Our gas bill dropped the first month after the condensing boiler install. Quiet, efficient, and Darryl explained every detail of the system.
Patricia N. — Lincoln Square
Perfect for Radiant Heat
Paired the condensing boiler with our radiant floor system. The outdoor reset keeps the floors at the perfect temperature all winter.
Michael S. — Andersonville
Best Upgrade We've Made
Replaced a 30-year-old cast iron boiler with a condensing unit. The difference in efficiency and comfort is remarkable. Highly recommend D's Air.
Sandra K. — Edgewater
D's Air Service Call Policy
Related Boiler Services
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D's Air & Heating, Inc. · (773) 940-0965 · [email protected] · IL License #2183457