The Prestige Excellence Combination Boiler features a stainless steel condensing boiler that provides 110,000 Btu per hour for space heating and a 14-gallon indirect water heater that delivers up to 180 gallons per hour of domestic hot water. Its control panel can operate as many as four circulators in a two-zone building. The unit is rated at 96 percent AFU efficiency and can be fueled by natural gas or propane. It costs $4,500. Triangle Tube, 856/228-8881, triangletube.com
