You have identical homes with identical heat loss. The homes have identical size and type storage tanks heated to exactly the same temperature throughout. The boiler type and size are out of the picture! These homes have different heat emitters. Standard Fintube, Big old cast iron radiators, Low Temp Panel Radiators, Low Temp Radient in floors. Will one type of emitter heat the home more efficiently? Will one home cool down faster? Probable a dumb question but I'm curious.