What is a furnace with the blower motor located above the heat exchanger called?

A furnace with the blower motor located above the heat exchanger is referred to as a downflow furnace. In this configuration, the heated air is pushed downward into the living space, which is ideal for certain installation scenarios, particularly in spaces where the furnace is situated at the top of a structure (like a basement or an attic).

The design of a downflow furnace is specifically intended to facilitate efficient heating by utilizing gravity to help distribute warm air effectively to lower levels of a building. This type of furnace is typically used when ducts are installed vertically, allowing heated air to travel directly into living areas from the furnace.

Understanding the layout of different types of furnaces is crucial for installation choices based on the specific design and flow requirements of a building.