The AFUE Evergreen boiler from Weil-McLain features new technology with simple controls. The unit is adaptable for most heating needs, including light commercial or large residential applications and for single- or multi-boiler installations. The unit features a guided setup wizard, a graphical user interface and 10 heating system presets. Three multiple-boiler sequencing options include smart mode, series mode and parallel mode. Company officials say the flexibility of the Evergreen boiler system reduces setup time and costs.