The fan center’s purpose is to control when the indoor fan turns on. Before the integrated gas control board, the indoor fan on gas and oil furnaces would either turn on at the same times as the heat ...
A furnace heat exchanger keeps dangerous gases out of the air circulating in the building. It's a must-have on any furnace ...
Boilers and furnaces use fuel or electricity to heat a building, but they work differently. Here's what you need to know ...