Dunkirk Royal CO Combi Boiler Installation in Chicago
Residential combi modulating condensing gas boiler — up to 95.2% AFUE, wall mounted, space heating and domestic hot water in one unit.
Don't 'FREEZE' — Call D's!
Boiler Type
Condensing Combi-Boiler
AFUE Efficiency
Up to 95.2% AFUE
Fuel Type
Natural Gas
Heat Exchanger
Stainless Steel
Application
Space Heat + Domestic Hot Water
Venting Type
Direct Vent / PVC
Installation Type
Wall Mounted
Get Your Free Estimate
High-Efficiency Combi Boiler — Heat & Hot Water in One
The Dunkirk Royal CO is a wall-mounted modulating condensing combi-boiler delivering up to 95.2% AFUE. It provides both space heating and on-demand domestic hot water from a single compact unit with a stainless steel heat exchanger. Ideal for Chicago condos, coach houses, and homes where space and efficiency both matter.
The Royal CO's modulating technology adjusts output from low to full capacity based on actual heating demand — reducing fuel consumption and maintaining precise comfort throughout the heating season. Direct vent PVC venting eliminates the need for a chimney, making the Royal CO an excellent choice for homes without existing chimney infrastructure or for homeowners looking to eliminate chimney maintenance costs.
For Chicago homeowners in condos, coach houses, or smaller homes, the Royal CO is a transformative upgrade. By combining your boiler and water heater into a single wall-hung unit, the Royal CO frees up valuable floor space and simplifies your mechanical system. The stainless steel heat exchanger provides superior corrosion resistance and long service life in condensing operation — where conventional cast iron would corrode from condensate exposure.
At up to 95.2% AFUE, the Royal CO is significantly more efficient than conventional cast iron boilers at 82-84% AFUE. For Chicago homeowners with high heating bills, the Royal CO can deliver meaningful fuel savings — and may qualify for energy rebates from Nicor Gas or other programs.
Key Features
Modulating Technology
Modulates from low to full capacity based on actual demand — eliminating on-off cycling and delivering consistent, efficient heat.
Combi — Heat & Hot Water
Provides both space heating and on-demand domestic hot water from a single compact wall-hung unit — no separate water heater needed.
Stainless Steel Heat Exchanger
Stainless steel heat exchanger provides superior corrosion resistance and long service life in condensing operation.
Up to 95.2% AFUE
Among the most efficient residential boilers available — significantly reduces fuel consumption compared to conventional cast iron boilers.
Space-Saving Design
Compact wall-mounted design eliminates the need for a separate water heater, saving valuable floor space in condos, coach houses, and smaller homes.
Direct Vent / PVC
Direct vent PVC venting eliminates the need for a chimney — installation flexibility for homes without existing chimney infrastructure.
Technical Specifications
| Model | Royal CO |
| Boiler Type | Residential Combi Modulating Condensing Gas Boiler |
| AFUE | Up to 95.2% |
| Fuel | Natural Gas |
| Installation | Wall Mounted |
| Application | Space Heating + Domestic Hot Water |
| Heat Exchanger | Stainless Steel |
| Venting | Direct Vent / PVC |
| Combustion | Modulating Condensing |
What's Included in the Installation
Trusted American Boiler Technology
Dunkirk has been manufacturing dependable heating equipment in Dunkirk, New York since 1928. For nearly a century, Dunkirk has built a reputation for durable construction, reliable combustion technology, and heating systems that stand the test of time. The Royal CO condensing combi-boiler represents Dunkirk's commitment to bringing the latest high-efficiency technology to Chicago homeowners.
The Royal CO's modulating condensing technology is a significant advancement over conventional cast iron boilers. By modulating output from low to full capacity based on actual heating demand, the Royal CO eliminates the inefficient on-off cycling of conventional boilers. Condensing operation recovers heat from flue gases that conventional boilers waste — achieving up to 95.2% AFUE versus 82-84% for conventional cast iron.
The stainless steel heat exchanger is specifically designed for condensing operation. In condensing mode, the boiler extracts so much heat from combustion gases that they condense into liquid — a process that would corrode conventional cast iron. Stainless steel resists this condensate corrosion, providing long service life and reliable performance throughout the boiler's lifespan.
For Chicago homeowners in condos, coach houses, or homes without chimney infrastructure, the Royal CO's direct vent PVC venting is a significant advantage. PVC vent pipes are inexpensive, easy to install, and require no chimney — providing installation flexibility that conventional boilers cannot match. The compact wall-mounted design further maximizes usable floor space in smaller Chicago homes.
Why Choose D's Air & Heating, Inc.
D's Air & Heating, Inc. has been providing professional boiler installation, replacement, repair, and maintenance services throughout Chicago since 2009. Founded by Darryl Q. Joyner Sr., D's Air & Heating has built a reputation for honest recommendations, quality workmanship, and professional customer service that Chicago homeowners trust.
Condensing combi-boiler installation requires specialized knowledge and experience. Unlike conventional boiler replacements, combi-boiler installations involve integrating domestic hot water connections, PVC venting, and condensate management. D's Air & Heating has the expertise to ensure your Royal CO is installed correctly for maximum efficiency and long-term reliability.
Every installation includes proper load calculations, startup procedures, safety verification, and customer training so you understand your new system. We pull all required City of Chicago permits, handle disposal of your old equipment, and leave your mechanical room clean.
D's Air & Heating operates without contracts and without gimmicks. We provide transparent, upfront pricing before any work begins. When you call for a free estimate, you receive an honest assessment of your heating needs and a clear price — no surprises, no hidden fees.
Common Applications
What Chicago Customers Say
⭐⭐⭐⭐⭐ 4.9/5 Customer Satisfaction
"D's Air installed the Dunkirk Royal CO in our condo and it's been fantastic. We eliminated our old water heater and the new combi-boiler handles both heating and hot water perfectly. The installation was clean and professional."
Jennifer L.
Lincoln Park, Chicago
"We have a coach house without a chimney and D's Air recommended the Royal CO. The PVC venting was easy to install and the unit is incredibly efficient. Our gas bills are noticeably lower than with our old boiler."
Carlos M.
Wicker Park, Chicago
"D's Air replaced our old boiler and water heater with the Dunkirk Royal CO. The space savings alone were worth it, and the efficiency improvement is real. Professional installation and they handled all the permits."
Susan K.
Logan Square, Chicago
"Called D's Air when we were renovating our home and wanted to upgrade our heating system. They recommended the Royal CO for its efficiency and space savings. The installation was excellent and the system works perfectly."
Brian T.
Bucktown, Chicago
Frequently Asked Questions
What is a combi-boiler?
A combi-boiler (combination boiler) provides both space heating and on-demand domestic hot water from a single unit. It eliminates the need for a separate water heater, saving space and reducing installation costs. The Royal CO heats water on demand — there is no storage tank, so you never run out of hot water.
How efficient is the Dunkirk Royal CO?
The Royal CO operates at up to 95.2% AFUE — significantly more efficient than conventional cast iron boilers at 82-84% AFUE. The modulating technology further reduces fuel consumption by matching output to actual heating demand rather than cycling on and off at full capacity.
Is financing available for a Royal CO installation?
Yes. D's Air & Heating offers financing options for qualified customers. Ask about current financing programs when you call for your free estimate.
Does the Royal CO require a chimney?
No. The Royal CO uses direct vent PVC venting — it does not require a chimney. This makes it an excellent choice for Chicago condos, coach houses, and homes without existing chimney infrastructure.
What warranty comes with the Dunkirk Royal CO?
The Royal CO includes Dunkirk's manufacturer warranty on the heat exchanger and components. Contact D's Air & Heating for current warranty terms.
Can the Royal CO replace my existing boiler and water heater?
Yes. The Royal CO is a combi-boiler that provides both space heating and domestic hot water. It can replace both your existing boiler and water heater in a single installation, saving space and simplifying your mechanical system.
Does D's Air & Heating pull permits for Royal CO installations?
Yes. D's Air & Heating pulls all required City of Chicago permits for every boiler installation. Permit processing is included in the installation price.
Is the Royal CO eligible for energy rebates?
High-efficiency condensing boilers may qualify for energy rebates from Nicor Gas, ComEd, or other programs. Ask D's Air & Heating about current rebate availability when you call for your free estimate.
Explore More Dunkirk Boilers
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D's Air & Heating provides professional Dunkirk boiler installation throughout Chicago.
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
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.
HVAC Education — What Chicago Homeowners Should Know
How Your HVAC System Works Together
A complete HVAC system includes a heating source (furnace or boiler), a cooling source (air conditioner or heat pump), air distribution (ductwork or hydronic piping), and controls (thermostat). Each component must be properly sized and matched to work efficiently. D's Air installs and services all components as a complete system.
Chicago's Climate Demands
Chicago experiences some of the most extreme temperature swings in the country — from -20°F wind chills in winter to 100°F heat indexes in summer. Your HVAC equipment must be sized and installed to handle both extremes reliably. D's Air has served Chicago since 2009 and understands what local homes require.
The Importance of Annual Maintenance
Annual tune-ups extend equipment life, maintain efficiency, and catch problems before they become failures. A well-maintained furnace lasts 20+ years. A neglected one may fail at 12–15 years. D's Air offers annual maintenance plans for both heating and cooling equipment.
Energy Efficiency and Savings
Upgrading from a 10 SEER AC to a 16 SEER unit cuts cooling costs by roughly 37%. Upgrading from an 80% AFUE furnace to a 96% AFUE unit cuts heating costs by about 17%. Over 10–15 years, these savings typically exceed the cost difference between standard and high-efficiency equipment.
What to Expect From D's Air & Heating
Contact
Call or book online. We respond promptly and schedule at your convenience.
Assessment
We evaluate your system, your home, and your needs before making any recommendation.
Written Estimate
You receive a clear, written estimate before any work begins. No surprises.
Professional Work
Our technicians are trained, licensed, and take pride in clean, code-compliant installations.
Testing
We test every system thoroughly before we leave and explain what was done.
Follow-Up
We remain available for questions, warranty support, and future service.
D's Air Professional Standards
- Licensed and insured — IL License #2183457
- Serving Chicago since 2009
- Proper load calculations on every installation
- City of Chicago permits pulled on every installation
- Equipment registered for full manufacturer warranty
- No contracts required — ever
- Transparent pricing — written estimates before any work
- Clean jobsite — we protect your home and clean up completely
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."
Sandra M.
Lennox Installation
"D's Air has been our go-to HVAC company for years. They installed our Lennox furnace and have maintained it ever since. Honest, reliable, and they never try to upsell you on things you don't need."
Kevin B.
HVAC Installation
"Professional from start to finish. They pulled the permit, did the installation correctly, and registered the equipment for warranty. That attention to detail is why I keep calling D's Air."
Denise H.
Furnace Repair
"Great experience overall. The technician was knowledgeable and took the time to walk me through the new system. Pricing was transparent with no hidden fees. Would definitely use again."
Ready to Work With Chicago's Trusted HVAC Company?
D's Air & Heating, Inc. — Serving Chicago Since 2009. Licensed, Insured, No Contracts.