Williamson’s new FreeStyle 155,000 btu/hr. input wall-mount gas-fired condensing boiler has an AFUE of 94.4% and is available in combi and heat-only models. The FS-155 combi unit provides 4 gpm of domestic hot water. The FreeStyle is designed with a single-tube large-diameter stainless-steel heat exchanger. A digital display control and 24 VAC thermostat relay are standard with each unit. It also provides modulating combustion with a 10:1 turndown ratio, allowing greater system design flexibility.