Product Features:
Compact Design
This unit is ideal for tight places - kitchens, utility rooms, alcoves, closets or stairwells.  The built-in tankless domestic water heater eliminates the need for a separate water heater, saving even more space.

Built-in Tankless Heater
The integral tankless heater provides a single appliance for space heating and domestic hot water needs.

Cast Iron Sections with Elastomer Sealing Rings
Boiler sections are made of durable cast iron for strength, efficiency and long life.  Modern elastomer sealing rings in the port openings ensure a permanent watertight seal and provide section flexibility for thermal expansion and contraction.

Integrated Control Module
Designed by Weil-McLain, the module uses a powerful microprocessor to monitor and sequence all boiler operations. Diagnostic indicator lights streamline troubleshooting and plug-in wire harnesses simplify wiring and service.

Venting Flexibility
Use direct exhaust venting which uses the boiler's induced draft fan to "push" flue products out the vent or natural draft venting which uses the draft created by a chimney or vertical vent to "pull" flue products out the vent.

High-Grade Stainless Steel Burners
Specially engineered for maximum efficiency with large venturi and precision port design.  Their construction and design ensure longer life, quieter operation and exceptional combustion.

3-Way Valve for Domestic Priority
If the tankless heater low limit senses boiler water is too cool to provide domestic hot water from the tankless coil, the 3-way valve diverts all of the hot water flow from the boiler back to the return, dedicating all available heat for domestic hot water.
 
Thermostatic Mixing Valve for Domestic Hot Water
Supplied with the boiler, the thermostatic mixing valve helps to maintain a constant domestic hot water temperature, mixing the hot water output from the coil with fresh cold water.

Factory-Tested
Every boiler is tested at the factory to assure reliable operation.

Improved Parts Kits
Parts are furnished in convenient kits.

Limited Lifetime Warranty
Covers cast iron sections.

Homeowner Protection Plan:
Covers labor and all Weil-McLain supplied parts for 5 or 10 full years.  Available through participating installers.