The new high-efficiency RCB-Series wall-hung commercial condensing boiler delivers reliable, energy-saving performance, the company says. The RCB-Series has a stainless-steel water tube heat exchanger and 97% thermal efficiency within a compact design. The premix burner performance reduces greenhouse gas emissions and increases turndown ratio — set at 10:1 for precise load tracking and energy savings. The RCB-Series is easy to program, access and monitor performance data onsite or with new connectivity features. Multiple boiler configurations can be accommodated with the Integrated Cascade Logic.