Weil-McLain’s SlimFit high-efficiency condensing gas boilers include improved boiler-to-boiler communication, Modbus and BACnet for linking with building automation systems, express setup wizard, 10 preset typical heating systems and updated controls interface for simpler navigation, at-a-glance boiler status, diagnostics and troubleshooting. The boilers are tested to achieve 96.1% combustion efficiency and 95.8% thermal efficiency. Available in five sizes from 550,000 to 2 million Btu/hr.