Weil-McLain CGi® Series 5 Cast-Iron Boiler Installation Chicago
Weil-McLain · Chicago Installation
CGi® Series 5
Cast-iron gas hot-water boiler — 84% AFUE, B-Vent compatible, built for Chicago homes.
Why D's Air & Heating, Inc. Recommends CGi® Series 5
Cast-Iron Durability
CGi Series 5 cast-iron sections are built to last 30–50 years — the proven standard for Chicago hydronic heating.
84% AFUE
Reliable 84% AFUE efficiency — a solid upgrade over older atmospheric boilers in Chicago homes.
Category I / B-Vent
Compatible with standard B-Vent and most existing chimney configurations in Chicago homes.
Hot-Water Hydronic
Designed for baseboard, radiant floor, and cast-iron radiator systems common in Chicago bungalows and two-flats.
Wide BTU Range
Available from 75,000 to 300,000 BTU/hr — covers single-family homes and larger multi-unit buildings.
Weil-McLain Warranty
Backed by Weil-McLain's limited warranty. D's Air & Heating, Inc. registers at startup.
The Weil-McLain CGi® Series 5 is a cast-iron gas hot-water boiler built for long-term reliability in Chicago's demanding climate. Its cast-iron heat exchanger sections are the traditional choice for Chicago homes — proven to last 30–50 years with proper maintenance and annual tune-ups.
The CGi Series 5 uses standard Category I / B-Vent venting, making it compatible with most existing chimney configurations in Chicago bungalows, two-flats, and greystones. This is a key advantage for replacement installations where upgrading to PVC condensing venting would require significant additional work.
D's Air & Heating, Inc. installs the CGi Series 5 throughout Chicago and the southwest suburbs. We handle all City of Chicago mechanical permits, piping, controls, and startup — and register your Weil-McLain warranty before we leave.
CGi® Series 5 — Installed Pricing
*Local taxes may apply. Financing available. Prices shown are D's Air & Heating, Inc. approved pricing.
Pricing Coming Soon
We're finalizing our approved installed pricing for this series. Call (773) 940-0965 or book online for a same-day quote.
CGi® Series 5
gas hot water
*Local taxes may apply. Financing available on approved credit.
Our Installation Process
- 1
Free On-Site Estimate
We assess your existing system, measure your space, and recommend the right Weil-McLain model for your home.
- 2
Permit & Scheduling
D's Air & Heating, Inc. pulls all required City of Chicago mechanical permits before work begins.
- 3
Professional Installation
Our licensed technicians install your new boiler to manufacturer specs, including all piping, controls, and venting.
- 4
Startup & Testing
We fire up the system, verify all zones, check for leaks, and confirm proper operation before we leave.
- 5
Warranty Registration
We register your Weil-McLain warranty and leave you with all documentation.
Weil-McLain Warranty Coverage
- Up to 10-year limited heat exchanger warranty on select condensing models
- 3-year limited parts warranty on most residential models
- 1-year labor warranty from D's Air & Heating, Inc.
- Warranty valid only with professional installation by a licensed contractor
Financing Available
Don't let upfront cost stop you from getting the right boiler. Ask about our flexible financing options on approved credit.
Book a Free EstimateWeil-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.
We help customers select the right Weil-McLain boiler based on building requirements, heating loads, efficiency goals, and budget considerations while ensuring every installation meets manufacturer specifications and local code requirements.
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 Boiler?
D's Air & Heating, Inc. installs Weil-McLain boilers throughout Chicago and the southwest suburbs. Call now or book online.