Weil-McLain 80 Series Commercial Boiler Installation Chicago
Weil-McLain Commercial Steam Boilers
80 Series Commercial Gas & Oil Boiler
Cast-iron sectional design. Gas and oil compatible. 82% AFUE. 105,000–245,000 BTU/hr. Built for Chicago's commercial and multi-unit buildings.
Weil-McLain 80 Series — Chicago's Dual-Fuel Commercial Boiler
The Weil-McLain 80 Series is a cast-iron sectional commercial boiler engineered for buildings that need gas and oil flexibility. With five models ranging from 105,000 to 245,000 BTU/hr, the 80 Series covers Chicago two-flats, three-flats, small commercial buildings, and institutional facilities that still operate on oil or are converting to natural gas.
The 80 Series uses Category I / B-Vent venting, making it compatible with most existing chimney configurations in Chicago's older building stock. Its cast-iron sectional design means individual sections can be replaced in the field — a significant advantage in tight Chicago mechanical rooms where full boiler replacement is difficult.
D's Air & Heating, Inc. installs the 80 Series throughout Chicago and the southwest suburbs. We handle all City of Chicago commercial mechanical permits, system piping, controls, and startup — and register your Weil-McLain warranty before we leave the job.
Why D's Air & Heating, Inc. Installs the 80 Series
Sectional Cast-Iron Design
Modular cast-iron sections allow precise BTU sizing and easy field replacement — no need to replace the entire boiler when a section fails.
82% AFUE
Proven atmospheric efficiency with long-term reliability in Chicago's demanding commercial and multi-unit heating environments.
Category I / B-Vent
Compatible with standard B-Vent and most existing chimney configurations in Chicago commercial buildings and two-flats.
Gas & Oil Compatible
The 80 Series accepts both natural gas and oil burners — the right choice for Chicago buildings converting from oil to gas.
105K–245K BTU/hr
Five models from 105,000 to 245,000 BTU/hr cover the full range of Chicago commercial and multi-unit heating loads.
Weil-McLain Warranty
Backed by Weil-McLain's limited warranty. D's Air & Heating, Inc. registers your warranty at startup.
80 Series — Models & Specs
| Model | BTU/hr Input | Efficiency | Fuel | Venting | Installed Price |
|---|---|---|---|---|---|
| 80-03 | 105,000 | 82% AFUE | Natural Gas / Oil | Category I / B-Vent | Call for Pricing |
| 80-04 | 140,000 | 82% AFUE | Natural Gas / Oil | Category I / B-Vent | Call for Pricing |
| 80-05 | 175,000 | 82% AFUE | Natural Gas / Oil | Category I / B-Vent | Call for Pricing |
| 80-06 | 210,000 | 82% AFUE | Natural Gas / Oil | Category I / B-Vent | Call for Pricing |
| 80-07 | 245,000 | 82% AFUE | Natural Gas / Oil | Category I / B-Vent | Call for Pricing |
80-03
105,000 · 82% AFUE
Natural Gas / Oil · Category I / B-Vent
Call for Pricing
80-04
140,000 · 82% AFUE
Natural Gas / Oil · Category I / B-Vent
Call for Pricing
80-05
175,000 · 82% AFUE
Natural Gas / Oil · Category I / B-Vent
Call for Pricing
80-06
210,000 · 82% AFUE
Natural Gas / Oil · Category I / B-Vent
Call for Pricing
80-07
245,000 · 82% AFUE
Natural Gas / Oil · Category I / B-Vent
Call for Pricing
*Local taxes may apply. Call for current installed pricing.
What's Included in Every 80 Series Installation
- Complete removal and disposal of existing boiler
- New Weil-McLain 80 Series boiler — properly sized for your building
- Gas or oil supply line connection and pressure test
- System piping, supply and return connections
- Expansion tank, pressure relief valve, and air separator
- Thermostat and zone control wiring
- City of Chicago commercial mechanical permit (when required)
- Full system startup, combustion analysis, and efficiency verification
- Weil-McLain warranty registration
Weil-McLain Boiler Installation & Service Experts
D's Air & Heating proudly provides professional Weil-McLain boiler installation, replacement, repair, maintenance, and emergency service throughout Chicago and surrounding communities. Weil-McLain is recognized as one of the most trusted names in the boiler industry, delivering reliable heating solutions for residential, commercial, steam, and hot water applications.
Our experienced boiler technicians install and service a wide range of Weil-McLain commercial equipment. Whether you need a new Weil-McLain boiler installation Chicago businesses rely on, complete boiler replacement, annual maintenance, or emergency repair service, D's Air & Heating has the expertise to keep your commercial heating system operating safely and efficiently.
From small commercial buildings to large boiler plant projects, D's Air & Heating delivers quality workmanship, expert system design, and dependable customer support backed by industry-leading Weil-McLain technology and warranty protection. Our Weil-McLain boiler repair Chicago commercial 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 Weil-McLain boiler installation, replacement, maintenance, or repair services.
Get a Commercial Boiler Estimate
D's Air & Heating, Inc. installs the Weil-McLain 80 Series throughout Chicago and the southwest suburbs. Call (773) 940-0965 or book online for a free commercial estimate.