Boilers Posted on June 1, 2020June 1, 2020 by pwdirene Buderus Heating/Domestic Hot Water System Complete Primary Heat Loop and Secondary Heat Zones Buderus Domestic 80 gallon Hot Water System on left. Constant Pressure System in Center and Filtration/Softening System on Right Domestic Constant Pressure System Buderus Multi-Zone Boiler with Domestic Indirect Heater Biasi Boiler, Amtrol Indirect Hot Water Heater, Cold Water Storage Tank Buderus Wall Hung High Efficiency Condensing Boiler with Multi-Zone Heating System Buderus with Mark