The Maui Series (MWC) boiler is a residential, fully-packaged, installer-ready, copper-finned, gas-fired, hot-water, condensing, direct vent boiler. This 85% efficient, ENERGY STAR® qualified boiler is offered in a "heat only" or "Combi" model that provides both domestic heat and hot water. The Maui is packaged with a concentric polypropylene venting system. The Maui is available in one size at 116,000 BTU/hr in both natural and LP gas.

The Maui's wall-mounted design is ideal for situations where space is at a premium. The Maui boiler utilizes direct spark ignition and is equipped with an expansion tank.