Weil-McLain LGB Series 3 Commercial Steam Boilers
Chicago's commercial steam boiler specialists. D's Air & Heating installs the full Weil-McLain LGB Series 3 lineup — from the LGB-4R to the LGB-20 — with complete installed pricing, professional steam piping, and full commissioning.
Why D's Air & Heating, Inc. for LGB Series 3 Steam
We specialize in large commercial cast-iron steam boiler replacement and installation throughout Chicago and the surrounding area. Every LGB Series 3 package includes secondary commercial safety controls, model-specific near-boiler steam piping, removal of the existing boiler, and full startup and commissioning.
Weil-McLain LGB Series 3 Commercial Steam Boiler
Full Series 3 lineup — 350,000 to 2,470,000 BTUH input. We install every model size.
Weil-McLain LGB Series 3 Commercial Steam Boiler
Every package includes applicable secondary commercial safety controls per code and AHJ requirements.
Weil-McLain LGB Series 3 Commercial Steam Boiler
Near-boiler piping sized and configured per current Weil-McLain Series 3 manufacturer requirements for each model.
Weil-McLain LGB Series 3 Commercial Steam Boiler
Starting prices include equipment, controls, piping, removal, labor, startup, and commissioning.
Weil-McLain LGB Series 3 Commercial Steam Boiler
Steam boiler sizing based on connected EDR and proper system evaluation — not square footage alone.
Weil-McLain LGB Series 3 Commercial Steam Boiler
D's Air & Heating has served Chicago's commercial and multi-unit market since 2009. IL License #2183457.
Weil-McLain LGB Series 3
Commercial Gas-Fired Boiler
The LGB Series 3 is Weil-McLain's flagship large commercial cast-iron boiler, available in steam and hot water configurations. Built for multi-unit residential buildings, schools, and large commercial facilities throughout Chicago.
- Cast-iron sectional construction for long service life
- Available in steam and hot water configurations
- Input range: 350,000 – 2,470,000 BTUH
- Natural gas or propane firing
- Atmospheric burner design — proven reliability
- Model-specific near-boiler piping per WM requirements
Professional Steam Boiler Sizing Available
Steam boiler sizing must be based on connected radiation (EDR) and proper system evaluation — not building square footage alone. D's Air & Heating provides professional steam boiler sizing for every LGB Series 3 project.
WM-LGB-6S
Pricing
Purchase Price
$31,933.43
Installed Combo Price
Contact for Installation Pricing
Prices are final customer-facing prices. D's Air & Heating does not display dealer cost, markup, or internal pricing formulas.
Equipment Package
- WM-LGB-6S Commercial Steam Boiler
- MH-L4079B1033 Manual-Reset Pressuretrol Limit
- MM-101A 120V Water Feeder
- HY-550 120V Manual-Reset/Test Probe LWCO
- HY-EL1214-P Extended Shank
- (2) 12" 24-Gauge 90° Vent Elbows
- (2) 12" 24-Gauge 2' Vent Pipes
LGB Series 3 — All Models & Starting Installed Prices
Starting complete installed prices include equipment, secondary commercial safety controls, model-specific steam piping, removal, labor, startup, and commissioning. Final price subject to field verification.
| Model | Input | Starting Installed |
|---|---|---|
| LGB-4R | 350,000 BTUH | $36,500 |
| LGB-4 | 400,000 BTUH | $39,500 |
| LGB-5 | 520,000 BTUH | $46,000 |
| LGB-6 | 650,000 BTUH | $52,500 |
| LGB-7 | 780,000 BTUH | $59,000 |
| LGB-8 | 910,000 BTUH | $65,500 |
| LGB-9 | 1,040,000 BTUH | $71,500 |
| LGB-10 | 1,170,000 BTUH | $78,000 |
| LGB-11 | 1,300,000 BTUH | $85,000 |
| LGB-12 | 1,430,000 BTUH | $91,000 |
| LGB-14 | 1,690,000 BTUH | $104,000 |
| LGB-16 | 1,950,000 BTUH | $116,500 |
| LGB-18 | 2,210,000 BTUH | $131,500 |
| LGB-20 | 2,470,000 BTUH | $147,000 |
Weil-McLain LGB Series 3
LGB-4R
Input: 350,000 BTUH
Starting Installed
$36,500
Weil-McLain LGB Series 3
LGB-4
Input: 400,000 BTUH
Starting Installed
$39,500
Weil-McLain LGB Series 3
LGB-5
Input: 520,000 BTUH
Starting Installed
$46,000
Weil-McLain LGB Series 3
LGB-6
Input: 650,000 BTUH
Starting Installed
$52,500
Weil-McLain LGB Series 3
LGB-7
Input: 780,000 BTUH
Starting Installed
$59,000
Weil-McLain LGB Series 3
LGB-8
Input: 910,000 BTUH
Starting Installed
$65,500
Weil-McLain LGB Series 3
LGB-9
Input: 1,040,000 BTUH
Starting Installed
$71,500
Weil-McLain LGB Series 3
LGB-10
Input: 1,170,000 BTUH
Starting Installed
$78,000
Weil-McLain LGB Series 3
LGB-11
Input: 1,300,000 BTUH
Starting Installed
$85,000
Weil-McLain LGB Series 3
LGB-12
Input: 1,430,000 BTUH
Starting Installed
$91,000
Weil-McLain LGB Series 3
LGB-14
Input: 1,690,000 BTUH
Starting Installed
$104,000
Weil-McLain LGB Series 3
LGB-16
Input: 1,950,000 BTUH
Starting Installed
$116,500
Weil-McLain LGB Series 3
LGB-18
Input: 2,210,000 BTUH
Starting Installed
$131,500
Weil-McLain LGB Series 3
LGB-20
Input: 2,470,000 BTUH
Starting Installed
$147,000
Standard Installation Package — What's Included
Every LGB Series 3 starting installed price covers the following standard scope.
Standard Scope Included
- Boiler/control package
- Primary controls
- Secondary commercial safety controls
- Standard steam piping/materials
- Standard removal of existing boiler
- Standard handling and assembly
- Standard boiler-side gas connection
- Standard boiler-side vent connection
- Standard electrical/control connections
- D's Air & Heating installation labor
- Startup
- Safety testing
- Commissioning
Secondary Commercial Safety Controls
Every LGB Series 3 installed package includes an allowance for applicable secondary commercial safety controls configured for the selected boiler, factory controls, manufacturer requirements, project requirements, applicable code, and the Authority Having Jurisdiction.
- Primary low-water cutoff
- Secondary probe-type low-water cutoff
- Manual-reset/test low-water protection where required
- Operating pressure control
- Independent manual-reset high-limit pressure control where required
- Automatic water feeder where applicable
- Gauge glass and fittings
- Pressure/steam instrumentation
- ASME relief protection
- Ignition/flame safeguard controls
- Required transformers and relays
- Safety interlocks
- Applicable gas safety controls
- Applicable CSD-1 controls
- Associated control wiring
Standard Exclusions
Starting installed prices do not automatically include asbestos testing or abatement, major chimney reconstruction, new chimney liner, major steam-main or condensate-return replacement, new boiler feed system, gas meter or utility upgrades, electrical service or panel upgrades, structural modifications, cranes, extraordinary rigging, or work not specifically identified in the Scope of Work. Final price is subject to field verification and final Scope of Work.
Request a Commercial Boiler Quote
Fill out the form below and D's Air & Heating will contact you to discuss your LGB Series 3 project.
Service Call Policy — D's Air & Heating, Inc.
A $95.35 Service Call Fee is Required for All Service Appointments, Including Warranty Claims.
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 equipment, including high-efficiency condensing boilers, cast iron hot water boilers, commercial heating systems, and steam boiler applications. Whether you need a new Weil-McLain 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 and efficiently.
From residential heating systems to large commercial boiler 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 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.
Ready to Replace Your Commercial Steam Boiler?
Call D's Air & Heating for a commercial boiler consultation, steam sizing, or installation quote. We serve Chicago and the surrounding area — licensed, insured, and experienced with large commercial cast-iron steam systems.