Peerless Residential Steam Boiler Comparison
Series 63 vs Series 63-X vs Series PSCII — compare capacity, features, and best applications for Chicago residential steam systems. All three series use cast-iron sectional construction and are designed for Chicago's two-flats, three-flats, and larger residential buildings.
Side-by-Side Comparison
| Series 63 | Series 63-X | Series PSCII | |
|---|---|---|---|
| Peerless Residential Steam Boiler | Up to 210K BTU | Up to 210K BTU | Up to 350K BTU |
| Peerless Residential Steam Boiler | Contact for Pricing | Contact for Pricing | Contact for Pricing |
| Peerless Residential Steam Boiler | ~80% AFUE | ~80% AFUE | ~80% AFUE |
| Peerless Residential Steam Boiler | Two-flats, three-flats, single-family homes | Multi-zone, complex steam systems, two-pipe systems | Six-flats, larger residential buildings |
| Peerless Residential Steam Boiler | ★★★★★ | ★★★★★ | ★★★★★ |
| Peerless Residential Steam Boiler | ★★★★★ | ★★★★★ | ★★★★★ |
| Peerless Residential Steam Boiler | ★★★★★ | ★★★★☆ | ★★★★☆ |
Frequently Asked Questions
What is the difference between Series 63 and Series 63-X?
The Series 63 is the standard residential steam boiler for Chicago two-flats and three-flats. The Series 63-X is designed for more complex steam systems — multi-zone systems, two-pipe steam systems, and buildings with higher control requirements. Both cover the same capacity range (up to 210,000 BTU) and use the same cast-iron construction.
When do I need the Series PSCII instead of the Series 63?
The Series PSCII covers up to 350,000 BTU and is the choice for larger residential buildings — six-flats, eight-flats, and other buildings with more radiation than the Series 63 can serve. If your building has more than three or four units, the PSCII may be the correct series.
How do I know which series is right for my building?
The correct series is determined by your building's connected radiation load — the total square footage of steam radiators in the building. D's Air & Heating measures the connected radiation at every estimate appointment and selects the correct series and model based on that measurement.
Are all three series available for Chicago buildings?
Yes. D's Air & Heating installs all three Peerless residential steam series in Chicago. We pull the City of Chicago mechanical permit on every installation and handle all inspections.
Chicago's residential steam heating systems are found in virtually every two-flat, three-flat, and six-flat built before 1960. The Peerless Series 63, 63-X, and PSCII are the standard replacements for these buildings. All three use cast-iron sectional construction that integrates directly with existing steam piping — no system modifications required in most cases.
D's Air & Heating, Inc. has been replacing residential steam boilers in Chicago since 2009. We serve two-flats, three-flats, six-flats, and single-family homes throughout the city and suburbs. Every installation includes a City of Chicago mechanical permit, a complete radiation survey, 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 boiler for your Chicago home.
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.