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High efficiency, Weil-McLain quality

Whether you’re a homeowner, contractor or building engineer, there’s a Weil-McLain high-efficiency boiler that delivers the performance you need. The lineup is engineered to live up to our legendary standards and push hydronic heating forward at the same time.

 

Residential boilers

Eco Tec High Efficiency Residential Boiler

ECO Tec

This premium heat-first combination boiler provides hot water when you need it and comfort where you want it with extreme efficiency.

Evergreen Pro High Efficiency Residential Boiler

Evergreen Pro

Quiet, sleek and sustainable space heating that’s adaptable to any residential heating application.

Ultra Series 4 High Efficiency Residential Boiler

Ultra Series 4

This corrosion-resistant boiler is designed to operate in low-temperature condensing applications.

GV90+ High Efficiency Residential Boiler

GV90+

Our industry-leading, cast iron dependability meets high-efficiency performance with this boiler great for high-temperature systems.

AquaBalance High Efficiency Residential Boiler

AquaBalance

We call this low-cost combination boiler the “cold-weather combi” because it efficiently serves the space and water heating of a home in even the coldest climates.

Commercial boilers

Evergreen High Efficiency Commercial Boiler

Evergreen

Larger Evergreen models are ideal for light-to-medium commercial and/or multi-unit residential installations.

SlimFit High Efficiency Commercial Boiler

SlimFit

The cast aluminum SlimFit is the fastest, easiest solutions for limited-space commercial retrofits.

SVF High Efficiency Commercial Boiler

SVF

This state-of-the-art boiler is ideal for schools and municipal buildings, hybrid applications or replacements.

Still curious what all the fuss is about?

Learn from our experts what makes high-efficiency boilers different from conventional, or standard, boilers, and the impact they can make.

Read more
EcoTec Control

Our high-efficiency boilers are tested and/or certified to the industry’s highest standards

Department of Energy

Department of Energy

ENERGY STAR

ENERGY STAR

AHRI – Air-Conditioning, Heating, & Refrigeration Institute

AHRI
Air-Conditioning, Heating, & Refrigeration Institute

ASME – American Society of Mechanical Engineers

ASME
American Society of Mechanical Engineers

Department of Energy

CSA
Canadian Standards Association

Department of Energy

UL
Underwriters Laboratories

ANSI – American National Standards Institute

ANSI
American National Standards Institute

Intertek

Intertek

NFPA – National Fire Protection Association

NFPA
National Fire Protection Association

SCAQMD – South Coast Air Quality Management District

SCAQMD
South Coast Air Quality Management District

Let’s talk high-efficiency boilers

Share your questions or comments below and we will be in touch.