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–$124,995 | $39,995–$51,995 | 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
211A Series
840K–2,310K BTU
$59,995–$124,995
Schools, large institutional, large apartment buildings
View Details64 Series
422K–632.5K BTU
$39,995–$51,995
Mid-size apartment buildings, 6–20 units
View DetailsSC Series
Up to ~600K BTU
Contact for Pricing
Apartment buildings, churches, commercial facilities
View DetailsFrequently 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.