Providing an overview of how you might set about comparing domestic downflow and upflow furnaces is a relatively straightforward process. The ‘flow’ of a domestic furnace actually refers to the path by which the heat is output from the furnace. A point which many people find surprising, as they automatically presume it will refer to the cold air flow into the furnace, in order to make the heat generated more or less intense.
3 Types of Domestic Furnace Flow
There are in fact three types of furnace flow, with the commonest ones being upflow and downflow.