Authorized Peerless Boiler Dealer Serving Chicago Since 2009
Peerless Commercial Steam Boiler Comparison
211A Series vs 64 Series vs SC Series — compare capacity, pricing, efficiency, and best applications side-by-side. All three series use cast-iron sectional construction and are the standard replacement for Chicago's aging commercial steam heating systems.
Side-by-Side Comparison
| 211A Series | 64 Series | SC Series | |
|---|---|---|---|
| Peerless Commercial Steam Boiler | 840K–2,310K BTU | 422K–632.5K BTU | Up to ~600K BTU |
| Peerless Commercial Steam Boiler | $59,995 | $39,995 | Contact for Pricing |
| Peerless Commercial Steam Boiler | ~80% AFUE | ~80% AFUE | ~80% AFUE |
| Peerless Commercial Steam Boiler | 10-Year HX | 10-Year HX | 10-Year HX |
| Peerless Commercial Steam Boiler | Schools, large institutional, large apartment buildings | Mid-size apartment buildings, 6–20 units | Apartment buildings, churches, commercial facilities |
| Peerless Commercial Steam Boiler | ★★★★☆ | ★★★★★ | ★★★★★ |
| Peerless Commercial Steam Boiler | ★★★★★ | ★★★★★ | ★★★★★ |
| Peerless Commercial Steam Boiler | ★★★★★ | ★★★★★ | ★★★★★ |
| Peerless Commercial Steam Boiler | ★★★★☆ | ★★★★★ | ★★★★☆ |
View Each Series
Frequently Asked Questions
What is the difference between the 211A and 64 Series?
The 211A Series covers larger capacity ranges — 840,000 to 2,310,000 BTU — making it the choice for schools, large institutional buildings, and large apartment complexes. The 64 Series covers 422,000 to 632,500 BTU and is the standard replacement for mid-size Chicago apartment buildings with 6–20 units. Both use cast-iron sectional construction with the same 10-year heat exchanger warranty.
How do I know which series is right for my building?
The correct series is determined by your building's heat load — calculated using a Manual J or equivalent heat loss calculation. D's Air & Heating performs this calculation at every free estimate appointment. We do not size boilers by the existing unit's nameplate; we size by the building's actual heat loss.
Can I replace a 64 Series with a 211A Series?
Technically yes, but oversizing a boiler causes short-cycling, which wastes fuel and accelerates wear. The correct replacement is sized to match the building's heat load, not to the largest available model. We'll calculate the right size during the estimate.
Are all three series available for Chicago buildings?
Yes. D's Air & Heating installs all three Peerless commercial steam series in Chicago. We pull the City of Chicago mechanical permit on every installation and handle all inspections.
Chicago's commercial steam heating systems were built primarily between 1920 and 1970. The boilers in these buildings are reaching the end of their service life, and the Peerless 211A, 64, and SC Series are the most common replacements. All three use cast-iron sectional construction — the same technology as the original boilers — which means they integrate directly with existing steam piping without requiring system modifications.
D's Air & Heating, Inc. has been replacing commercial steam boilers in Chicago since 2009. We serve apartment buildings, schools, churches, and commercial facilities throughout the city and suburbs. Every installation includes a City of Chicago mechanical permit, a complete heat loss calculation, and a 2-year workmanship warranty. Call (773) 940-0965 for a free in-building estimate.
Not Sure Which Series Is Right?
D's Air & Heating performs a complete heat loss calculation and recommends the right series and model for your building.
IL License #2183457 · Serving Chicago Since 2009
Peerless Boiler Installation & Service Experts
D's Air & Heating proudly provides professional Peerless boiler installation, replacement, repair, maintenance, and emergency service throughout Chicago and surrounding communities. Peerless Boilers has earned a reputation for manufacturing dependable, energy-efficient residential and commercial heating systems designed to deliver long-lasting performance and reliable comfort.
Our experienced boiler technicians install and service a wide range of Peerless heating equipment, including cast iron boilers, high-efficiency condensing boilers, steam boilers, and hot water boiler systems. Whether you need a new Peerless boiler installation Chicago homeowners and businesses rely on, complete boiler replacement, annual maintenance, or emergency repair service, D's Air & Heating has the expertise to keep your heating system operating safely, efficiently, and reliably throughout the year.
We help homeowners, property managers, and commercial building owners select the right Peerless boiler for their specific heating requirements, efficiency goals, and budget. Every installation is completed according to manufacturer specifications and local code requirements, ensuring safe, reliable operation and full warranty coverage.
From residential steam and hot water boilers to large commercial boiler systems, D's Air & Heating delivers quality workmanship, expert system design, and dependable customer support backed by Peerless technology and warranty protection. Our Peerless boiler repair Chicago customers trust us for fast diagnostics, genuine parts, and lasting fixes.
Contact D's Air & Heating today at (773) 940-0965 to schedule your free estimate for Peerless boiler installation, replacement, maintenance, or repair services.
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.
Steam Boiler Expertise — What Chicago Building Owners Should Know
How a Steam Heating System Works
A steam boiler heats water to 212°F, producing steam that rises naturally through supply pipes to cast-iron radiators throughout the building. As the steam gives up its heat, it condenses back to water and returns to the boiler by gravity. One-pipe systems use the same pipe for both steam supply and condensate return. Two-pipe systems use separate supply and return lines, allowing better control and zoning.
The Hartford Loop — Why It Matters
The Hartford Loop is a critical safety piping arrangement on steam boilers. It prevents the boiler from losing its water level if a return pipe develops a leak. Without a properly installed Hartford Loop, a pipe failure can drain the boiler dry, causing catastrophic damage. D's Air installs the Hartford Loop correctly on every steam boiler installation.
Steam Boiler Sizing — EDR Calculations
Steam boilers are sized by Equivalent Direct Radiation (EDR) — the total radiation capacity of all the radiators in the building. The boiler must be sized to match the connected radiation, not the building's heat loss. An oversized steam boiler causes water hammer, wet steam, and rapid cycling. D's Air measures EDR on every steam boiler installation.
Water Quality and Treatment
Steam boiler water quality directly affects system performance and longevity. Impurities cause foaming, which produces wet steam and water hammer. Proper pH balance prevents corrosion of the boiler sections and pipes. D's Air tests water quality and recommends treatment on every steam boiler installation and service call.
Common Steam System Problems
The most frequent steam system issues in Chicago buildings: water hammer (banging pipes — usually caused by wet steam, improper pitch, or failed steam traps), uneven heat between floors (failed vents or traps), boiler cycling on low water (LWCO trips — check water level and return lines), and radiators that won't heat (air-bound — replace the air vent).
What to Expect From Your D's Air Steam Boiler Service
System Assessment
We inspect the boiler, near-boiler piping, Hartford Loop, vents, traps, and radiators before recommending any work.
EDR Measurement
For new installations, we measure every radiator in the building to size the replacement boiler correctly.
Written Estimate
You receive a complete written estimate covering equipment, labor, piping, and permits before any work begins.
Installation
Our crew installs the new boiler with proper near-boiler piping, Hartford Loop, and all safety controls.
Startup & Testing
We fill the system, fire the boiler, verify steam pressure, check all vents and traps, and confirm heat to every radiator.
Customer Training
We explain how to check the water level, what the pressuretrol does, and what maintenance is needed annually.
D's Air Steam Boiler Standards — Every Installation
- EDR calculation — boiler sized to match connected radiation
- Hartford Loop installed per industry standard
- Near-boiler piping per manufacturer specifications
- Equalizer pipe properly sized and connected
- Low-water cutoff tested and verified
- Pressuretrol set to correct operating pressure (typically 0.5–2 PSI)
- All steam vents and traps inspected and replaced as needed
- Water quality tested — treatment recommended if needed
- Gas pressure test and combustion analysis at startup
- City of Chicago permit pulled on every installation
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.