Image Wrong – Two combustion appliances are sharing a flue which could lead to backdrafting if one appliance is updated to a direct vent appliance and disconnected from shared chimney.
Combined Space and Water Heating: Next Steps to Improved Performance Author(s) Bohac Dave, Schoenbauer Ben, Huelman Patrick H Organization(s) University of Minnesota, UMN, NothernSTAR, NSTAR, U.S. Department of Energy, DOE Publication Date July, 2016 Description Report describing combined space- and water-heating (combi) systems using a high-efficiency direct-vent burner.
