Bosch-052713-body.jpgBosch has introduced a new high efficiency condensing boiler in two models under its Buderus brand. The SB Series high mass boiler, with maximum efficiencies up to 98% and input ranges from 563 to 5443 MBH, comes in stainless steel with dual return water connections for higher efficiency gains. The design has no restrictions with respect to return water temperature, water flow or temperature rise through the boiler. The SB Series can be used with multiple fuels including natural gas, propane or heating oil.