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. Technical Visit — $95.35 · Don't "FREEZE" — Call D's!
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
Service Call Policy — D's Air & Heating, Inc.
Related Boiler Services
Ready to Cut Your Gas Bill?
D's Air & Heating, Inc. · (773) 940-0965 · dsairheating@gmail.com · IL License #2183457
Why Chicago Homeowners Trust D's Air & Heating
Licensed & Insured
IL License #2183457
Serving Chicago
Since 2009
Authorized Dealer
Multiple Brands
No Contracts
Ever — Guaranteed
Permit Pulled
Every Installation
Professional Standards
Code-Compliant Work
EPA Certified
Mainstream Engineering
R-410A Certified
Mainstream Engineering
Why Choose D's Air & Heating, Inc.?
Chicago's trusted HVAC company since 2009 — licensed, insured, and committed to honest workmanship on every job.
Experience Since 2009
D's Air & Heating has served Chicago homeowners and businesses since 2009. Over 15 years of local HVAC experience means we've seen every type of system, every Chicago building configuration, and every challenge the city's climate presents.
Manufacturer-Trained Technicians
Our technicians receive ongoing manufacturer training and certification. We install Lennox, Goodman, Amana, Daikin, Sinclair, Weil-McLain, Peerless, and other leading brands — and we know each system inside and out.
Licensed, Insured & Permitted
D's Air & Heating holds Illinois HVAC License #2183457 and carries full liability insurance. We pull City of Chicago permits on every installation — protecting you legally and ensuring the work meets code.
Honest Recommendations
We tell you what you need — not what generates the highest invoice. If your system can be repaired cost-effectively, we'll say so. If replacement makes more sense, we'll explain exactly why. No pressure, no upselling.
Local Chicago Expertise
We know Chicago's housing stock — two-flats, greystones, bungalows, vintage buildings with steam heat, modern construction with forced air. We size and install equipment for the specific demands of Chicago homes and Chicago winters.
Long-Term Customer Support
Our relationship doesn't end at installation. We register your equipment for warranty, remain available for follow-up questions, and provide ongoing maintenance to keep your system running at peak efficiency for years.
What Chicago Homeowners Should Know About Boiler Installation
How a Hot Water Boiler Works
A hot water (hydronic) boiler heats water and circulates it through pipes to radiators, baseboard convectors, or radiant floor tubing. The water returns to the boiler, is reheated, and recirculates. Modern condensing boilers achieve 90%+ efficiency by recovering heat from exhaust gases that older boilers waste.
Steam vs. Hot Water Boilers
Steam boilers — common in Chicago's older two-flats and greystones — heat water until it becomes steam, which rises naturally through pipes to cast-iron radiators. They require no circulator pump but need precise water level control. Hot water systems are quieter, more efficient, and easier to zone. D's Air installs and services both.
Boiler Sizing and Near-Boiler Piping
Correct boiler sizing requires calculating the heat loss of every room in the building. Oversized boilers short-cycle and cause water hammer in steam systems. Proper near-boiler piping — header design, equalizer pipe, Hartford Loop for steam — is as important as the boiler itself. D's Air follows manufacturer piping diagrams and ASHRAE guidelines on every installation.
Combustion Safety and Venting
Every boiler installation requires proper combustion air supply and flue venting. Inadequate combustion air causes incomplete combustion and carbon monoxide production. Improper venting allows flue gases to back-draft into the living space. D's Air verifies combustion air, draft, and CO levels on every installation.
What to Expect From Your D's Air Boiler Installation
Free Estimate
We inspect your existing system, measure your building, and provide a written quote covering equipment, labor, and permits.
Equipment Selection
We recommend the right boiler type (steam, hot water, condensing, combi) and brand for your building and budget.
Installation Day
Our crew protects your space, removes the old boiler, installs the new system with proper piping, and cleans up completely.
Startup & Testing
We fill the system, purge air, test all safety controls, verify gas pressure, and confirm proper heat distribution.
Customer Training
We explain your new boiler's controls, how to check the water level (steam systems), and what maintenance is needed.
Warranty Support
We register your equipment and remain available for follow-up service and annual maintenance.
D's Air Installation Standards — Every Boiler Job
- Heat loss calculation and proper boiler sizing
- Near-boiler piping per manufacturer specifications
- Hartford Loop installation on all steam systems
- Backflow preventer and expansion tank on all hot water systems
- Gas line pressure test and leak check at all connections
- Flue venting verification — draft, clearances, and termination
- Low-water cutoff test and safety control verification
- Combustion analysis and CO test after startup
- City of Chicago permit pulled on every installation
- Equipment registered for full manufacturer warranty
What Our Customers Say
Based on Google Reviews — D's Air & Heating, Inc.
Marcus T.
Furnace Replacement
"D's Air & Heating did an outstanding job replacing my furnace. Darryl was professional, on time, and explained everything clearly. The installation was clean and the system works perfectly. Highly recommend."
Latoya W.
Boiler Repair
"Called D's Air when my boiler stopped working in January. They came out the same day, diagnosed the problem quickly, and had it running again within hours. Fair pricing and excellent service."
James R.
AC Installation
"Installed a new central AC system for us this summer. The crew was respectful of our home, cleaned up after themselves, and the system runs quietly and efficiently. Very satisfied."
Ready to Work With Chicago's Trusted HVAC Company?
D's Air & Heating, Inc. — Serving Chicago Since 2009. Licensed, Insured, No Contracts.