Weil Mclain CGI Boilers are Gas fired water boiler with cast iron sections. These Weil Mclain Boilers offer power vent capability and can be used with natural or propane gas. All units are factory-tested, and include a limited lifetime warranty on cast iron sections. The Compact design of these boilers saves valuable living space, there is no vertical draft hood and no mechanical vent damper. The boilers offer intermittent electronic ignition with standard components for easy servicing.