Direct Fired vs Indirect Fired Heaters

CINCINNATI - May 30, 2017 - PRLog -- Today, we'll answer what the difference is, technically, between direct fired and indirect fired?

"Direct Fired" means just that; the burner is fired directly into the process air stream to heat it. Air heaters that are direct fired are utilized in applications where the end product will not be affected by the by-products of combustion. Direct fired air heaters are typically less expensive and more efficient than indirect fired units, as direct-firing units converts nearly 100% of the combustion gases used to hot air.

"Indirect Fired" means that the air is heated "indirectly"; the burner is fired into a heat exchanger. The air is heated when it passes over the heat exchanger and thus, the by-products of combustion remain inside the heat exchanger and do not come into direct contact with the process air. Indirect fired air heaters are used for chemically sensitive products, dairy products, grain and fiber processing, chemicals, pharmaceuticals, ect.

If you have any questions regarding an industrial application and which form of heating would best suite your process, please call Stelter & Brinck at 513-367-9300

This article originally appeared on: https://www.stelterbrinck.com/blog/direct-fired-vs-indire...