Daily Archives: December 10, 2025

What is an Air Preheater (APH)? An Air Preheater is a device designed to recover waste heat from the hot exhaust gases (flue gases) of a furnace, boiler, or other combustion process. It uses this recovered heat to preheat the combustion air being supplied to the burner.

Key Advantages of Installing an Economizer Where Are They Used? Economizers are essential equipment in virtually any facility that uses a large boiler, including:

The Role of Fin Tubes in an Economizer This is where the connection to our previous discussion becomes clear. Economizers are a prime example of a fin tube heat exchanger. The most common types of fin tubes used in economizers are: H-Finned Tubes: Used in very dusty flue gas (e.g., from coal or biomass) as the design […]

A Boiler Economizer is a mechanical device designed to recover waste heat from the hot flue gases leaving a boiler. It uses this heat to preheat the feedwater being pumped into the boiler. How Does it Work? The principle is straightforward: