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Weil-McLain Boilers

One of the most basic needs in commercial and industrial buildings is a high-performance, high-efficiency boiler to heat, boil, or vaporize water or some other liquid for use in a variety of applications, such as generating power, heating indoor air, or simply providing a hot water supply.

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About Weil-McLain Boilers

ATI has partnered with Weil-McLain to bring you a wide selection of the most durable, high-output boilers on the market. Some of their most popular products are listed below:

SlimFit Commercial Condensing Boiler

The SlimFit is ideal for retrofits with tight space limitations, and was made to be able to comfortably be wheeled through a standard-width mechanical room doorway to move it where it’s needed. It is durable, reliable and easy to install. It arrives completely assembled and is ready to go out of the box. It is even pre-wired, pre-programmed and tested in the factory. There are 5 individual models, which can be grouped into 2 broader categories with regard to their features. The first category includes the SlimFit 550 and the 750, which are 550MBH, 750MBH respectively. The second category includes the more robust models: the SlimFit 1000, the 1500 and the 2000, which are 1000MBH, 1500MBH, 2000MBH respectively. You can see a full breakdown of their key specs below:

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weil-mclain slim fit product chart
Weil-McLain Product Selector

Which Weil-McLain Boiler Is Right for You?

Find out which Weil-McLain boiler is best for your specific needs! Click the button below to use our product selector:

Evergreen Gas Boiler

The Evergreen line includes 3 models of modulating condensing boiler with a 10:1 turndown. The models include the EVG 220, EVG 299 and EVG 399, which refer to their respective sizes (220MBH, 299MBH and 399MBH). These impressive gas-fueled boilers feature a stainless steel fire tube heat exchanger and non-metallic base. They’re designed as a floor-standing boiler, but an optional wall mount kit is available if needed. Notably, the Evergreen Gas Boilers have 95% AFUE (EVG 220/299 models) and 96.5% Combustion Efficiency (EVG 399).

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80 Commercial
Gas/Oil Boiler

Uses gas and/or light oil for fuel, gets 80% thermal efficiency, produces water or steam, comes with/without a burner, has a convertible flue and is easy to install.

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88 Series 2 Commercial Gas/Oil Boiler

Fueled by gas and/or oil, 85% thermal efficiency, water or steam, numerous settings, works with single/multi-boiler systems and with/without a tankless heater, and is 100% LEED compliant.

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94 Commercial
Gas/Oil Boiler

The largest cast iron boiler in production of any manufacturer. Runs on gas/gas and light oil, gas tight cast iron with strong cross-sections, 86.7% thermally efficient, hydro-wall design with maximum circulation, easy maintenance/assembly and up to 80 lbs. working pressure.

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EGH Commercial Gas Boiler

Gas-fueled with gas valve and regulator, cast iron construction with insulated steel jacket, water or steam, medium capacity that is ideal for apartments and smaller commercial buildings.

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LGB Commercial Gas Boiler

Weil-McLain's most efficient commercial cast iron gas boiler, a natural draft water/steam boiler, has built-in air separators, is highly compact to allow greater headroom, and assembly/installation are fast and simple.

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ATI can equip you with every variety of boiler and help you select the boiler with the output, efficiency, and specifications that work best for each application.