Lennox Boilers for Reliable,
Even Heating in Northern Homes
High-efficiency gas boilers for homes with radiators, baseboard heat, or radiant floors. Quiet, even warmth — no drafts, no noise.
Lennox Premier Dealer · IL License #2183457 · Serving Chicago Since 2009
Hydronic Heating Specialists
Why Lennox Boilers Are Ideal for Cold Climates
Why Lennox Boilers Are Ideal for Cold Climates
Hydronic heating distributes warmth through radiators, baseboards, or in‑floor piping, creating smooth, even comfort. Lennox boilers maintain stable temperatures, reduce energy waste, and operate quietly — perfect for older homes, multi‑unit buildings, and properties with existing radiator systems.
Lennox boilers deliver heat through water rather than air. Hot water circulates through radiators, baseboard convectors, or in‑floor tubing, radiating warmth evenly from every surface. The result is a room that feels uniformly comfortable — no cold spots near windows, no hot blasts from registers, and no noise from a blower motor cycling on and off. Hydronic heat is widely considered the most comfortable form of residential heating, and Lennox boilers are engineered to deliver it reliably year after year.
Lennox offers standard‑efficiency and high‑efficiency condensing boilers designed to lower fuel usage and reduce monthly heating costs. The GCWB95 condensing boiler reaches 95% AFUE — meaning 95 cents of every dollar spent on gas goes directly into heating your home. Many Lennox boilers also integrate easily with smart thermostats and zoning controls, giving homeowners more precise comfort and better control over energy use.
Chicago's classic homes often rely on radiator or baseboard heating. Lennox boilers integrate seamlessly with these systems, providing reliable warmth and long‑term performance. Hydronic heat is ideal for homes with older ductwork, boiler‑based heating, or rooms that struggle to stay warm. Whether your home has cast iron radiators, fin‑tube baseboard convectors, or radiant floor tubing, there's a Lennox boiler sized and configured for your setup.
Standard boilers like the GWB84-E and GWB84-IE operate at 84% AFUE — reliable, proven, and cost-effective to install. Condensing boilers like the GCWB95 extract additional heat from exhaust gases, reaching 95% AFUE and delivering meaningful long‑term energy savings. The right choice depends on your existing venting, budget, and how long you plan to stay in the home. D's Air will walk you through both options and help you make the decision that makes the most sense for your situation.
Compare Lennox Boilers
| Model | Type | AFUE | Best For | Notes |
|---|---|---|---|---|
| GWB84 | Standard | 84% | Older homes, basic hydronic systems | Reliable, budget‑friendly |
| GWB95 | High‑Efficiency | 95% | Energy‑conscious homeowners | Lower fuel usage |
| GWB96 | High‑Efficiency | 96% | Radiators & baseboards | Quiet operation |
| GWB98Top Pick | Condensing | 98% | Maximum efficiency | Best for new installs or upgrades |
How Hydronic Heating Works
Hydronic heating uses heated water instead of forced air to warm your home. A boiler heats water and circulates it through radiators, baseboards, or in‑floor piping. As the water moves through the system, it releases gentle, even heat throughout every room.
Benefits of Hydronic Heating
- Even comfort — no blasts of hot air
- Quiet operation — no fans or blowers
- Cleaner air — fewer airborne particles
- Energy efficient — stable temperatures reduce waste
- Perfect for older homes with radiator systems
Hydronic heating is one of the most comfortable and efficient ways to heat a home, especially in northern climates like Chicago.
DsAir provides expert boiler installation, replacement, and service throughout Chicago. We size your boiler correctly, ensure proper venting, and deliver long‑term reliability backed by Lennox engineering. Whether you're replacing an aging system, upgrading to a more efficient model, or adding hydronic heat to a renovation, we can help you choose the right boiler for your home.
Lennox Boiler Lineup
GWB84-E · GWB84-IE · GWB9-IH · GCWB95 & GSB8-E
Four hot water models — including a 95% AFUE condensing unit — plus one steam boiler. The full Lennox residential lineup, installed by D's Air with full warranty support.
LX-BOIL-GWB84E-INST
Lennox GWB84-E Gas Hot Water Boiler
The GWB84-E is Lennox's standard-efficiency hot water boiler — reliable, durable, and built for Chicago winters. Compatible with radiators, baseboard convectors, and radiant floor systems.
- 84% AFUE efficiency
- Cast iron heat exchanger
- Compatible with radiators & baseboard
- Multiple input sizes available
- Quiet, draft-free operation
- Lennox manufacturer warranty
Installed from
$5,495–$6,495
LX-BOIL-GWB84IE-INST
Lennox GWB84-IE Gas Hot Water Boiler
The GWB84-IE adds an induced-draft blower for positive venting — ideal for homes where natural-draft venting isn't practical. Same cast iron durability, wider BTU range.
- 84% AFUE efficiency
- Induced-draft blower for positive venting
- Wider BTU range than standard GWB84
- Cast iron heat exchanger
- Compatible with radiators & baseboard
- Lennox manufacturer warranty
Installed from
$5,995–$7,495
LX-BOIL-GWB9IH-INST
Lennox GWB9-IH Gas Hot Water Boiler
The GWB9-IH is Lennox's high-capacity hot water boiler — designed for larger homes, multi-unit buildings, and commercial applications requiring higher BTU output.
- 84% AFUE efficiency
- High-capacity output up to 400,000 BTU
- Ideal for multi-unit & larger homes
- Cast iron sections
- Induced-draft design
- Lennox manufacturer warranty
Installed from
$6,995–$9,495
LX-BOIL-GCWB95-INST
Lennox GCWB95 Condensing Gas Boiler
The GCWB95 is Lennox's high-efficiency condensing boiler — 95% AFUE means more heat from every dollar of gas. Ideal for homeowners upgrading from an older, low-efficiency system.
- 95% AFUE condensing efficiency
- Significant energy savings vs. standard boilers
- Stainless steel heat exchanger
- Compatible with radiant floor & baseboard
- Modulating burner for precise comfort
- Lennox manufacturer warranty
Installed from
$7,495–$9,995
LX-BOIL-GSB8E-INST
Lennox GSB8-E Gas Steam Boiler
The GSB8-E is designed for homes with existing steam radiator systems — common in older Chicago two-flats and greystone buildings. Reliable, durable, and built to last.
- 82% AFUE efficiency
- Designed for steam radiator systems
- Ideal for older Chicago two-flats
- Cast iron sections
- Low-water cutoff included
- Lennox manufacturer warranty
Installed from
Call for Pricing
Lennox Premier Dealer
Proper sizing. Professional installation. Long-term reliability.
Why Hydronic Heat?
The Benefits of Boiler Heating
Even, Draft-Free Warmth
Hydronic heat radiates from surfaces rather than blowing air, eliminating cold spots and drafts.
Whisper-Quiet Operation
No blower motor means no noise — just silent, consistent heat throughout your home.
Better Indoor Air Quality
No ductwork means no dust, allergens, or debris circulating through your living spaces.
Easy Zoning
Hydronic systems support multiple zones with individual thermostats for room-by-room control.
Long Equipment Life
Cast iron boilers routinely last 25–30 years with proper maintenance — far longer than forced-air systems.
Works With Existing Systems
Lennox boilers integrate with your existing radiators, baseboard convectors, or radiant floor piping.
High-Efficiency Heating
Condensing Boilers:
Up to 95% AFUE Efficiency
Condensing boilers extract heat from exhaust gases that standard boilers vent away — capturing that extra energy and putting it back into your home. The result is significantly lower fuel consumption and reduced monthly heating costs, especially in Chicago's long winters.
- 95¢ of every $1 in gas goes directly into heating your home
- Sealed combustion — safer operation, better indoor air quality
- Modulating heat output matches demand — no wasted energy
- Compatible with smart thermostats and zoning systems
Have Questions?
Frequently Asked Questions About Lennox Boilers
How long does a Lennox boiler last?
What's the difference between standard and high‑efficiency boilers?
Can a Lennox boiler heat my entire home?
Do boilers work with smart thermostats?
How often should a boiler be serviced?
What are signs my boiler needs repair?
DIY First Steps
Common Boiler Problems & How to Check Them
Try these checks before calling for service. If the problem persists, schedule a boiler repair.
Boiler Not Heating
- Check thermostat settings
- Verify system pressure (12–20 PSI normal)
- Ensure the boiler switch is ON
- Bleed radiators if cold at the top
Boiler Making Noise
- Banging = air in system
- Whistling = scale buildup
- Rumbling = sediment in boiler
- System likely needs flushing or bleeding
Radiators Not Heating Evenly
- Bleed air from radiators
- Check zone valves
- Verify circulator pump operation
- Cold zone may have a stuck zone valve
Boiler Pressure Too Low
- Add water using the fill valve
- Check for leaks at fittings
- Inspect expansion tank
- Low pressure can shut the boiler down
Boiler Keeps Shutting Off
- Faulty flame sensor
- Ignitor failure
- Pressure switch issues
- Venting blockage
Stay Ahead of Breakdowns
Annual Lennox Boiler Maintenance Checklist
DsAir covers every item on this list during a professional boiler tune-up. Schedule Lennox boiler maintenance to keep your system running safely all winter.
System Inspection
- Inspect boiler exterior
- Check for leaks
- Verify venting and combustion air
- Inspect heat exchanger
Safety & Controls
- Test flame sensor
- Test ignitor
- Test gas valve operation
- Verify pressure relief valve
- Check thermostat communication
Hydronic System
- Check system pressure (12–20 PSI)
- Inspect expansion tank
- Test circulator pump
- Test zone valves
- Bleed radiators if needed
Cleaning & Efficiency
- Clean burners
- Clean flame sensor
- Flush system if sediment present
- Check combustion efficiency
- Document readings & recommendations
Verified Homeowners
Real Customer Reviews
See what verified homeowners across Chicago are saying about their heating and cooling upgrades.
"DsAir replaced our old boiler with a Lennox high‑efficiency model. The heat is even throughout the house and our gas bill dropped noticeably."
"Our 1920s home finally heats evenly. The new Lennox boiler is quiet and reliable."
"The ceiling cassette mini‑split keeps our attic comfortable year‑round. Professional installation and great results."
"Elite Series Lennox AC installed by DsAir. Fast service, clean work, and excellent cooling."
Shannon Phipps
September 11, 2026
he really does a great job, and not over charging for his services
joyce thompson
September 9, 2026
I just had Darryl and his son DeMarte at my place to do a furnace clean and check before the cold weather comes along. They did a great job of getting my furnace ready for the winter....they were both personable and you can tell that Darryl is very invested in the work that he does. I would definitely suggest them for your heating needs. And I like their slogan...."Dont Freeze, Call D"s....sort of sums it up right there : ))
Audrey Sekendur
September 5, 2026
Darryl fixed our AC during a heat advisory and he was very professional and friendly. He really helped us out, I would absolutely recommend his company and plan to use D's Heating and Air again in the future.
Afagh Saghafi
August 8, 2026
John Egger
July 28, 2026
Prompt and excellent work and a pleasure to deal with.
Danielle Pappas
July 25, 2026
Darrell Jr and Darrell Sr were prompt, offered great service, and were able to get parts and finish the job same day. Pricing was better than the other estimate I received. I will work with them again!
Phillip B
July 19, 2026
Can't say enough good things about D's Air & Heating. Darryl Q. Joyner Sr. is knowledgeable, professional, and honest — a rare combination in HVAC. He walked me through exactly what was going on with my system, gave me a fair, upfront estimate, and got the work done cleanly and on schedule. No games, no surprise charges.
Kenneth Scott
May 8, 2026
Excellent Service and great customer service
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Sign up for a D's Air Maintenance Agreement and receive 15% off qualifying repairs and upgrades upon acceptance.
Service call charge is for travel and diagnostics only. It is not deducted from the job total.
Chicago's Boiler Installation Experts
Upgrade to a High‑Efficiency Lennox Boiler Today
Experience reliable, even heat all winter long with a professionally installed Lennox boiler. DsAir provides expert sizing, installation, and service for hydronic heating systems across Chicago.
Don't "FREEZE" — Call D's for fast, reliable boiler installation.