At its most basic level, an air heater works by passing air across a heated element to elevate the temperature of the air. That hot air can then be used for a variety of applications ranging from heating a space to drying parts and coatings, or from de-flashing plastic components to heating parts in a manufacturing process.
Recommended reading in this series:
Sizing a Heater and Blower
The main variable to consider when sizing the heater is the power–or watts–required for the application. To properly size a blower, the two main variables are pressure and flow. More information about pressure and flow can be found in our article. The choices of heater and blower are interrelated in several ways. Below is an overview of the considerations necessary to select the correct match.
Blower Considerations (type and size)
These are only an example of criteria that might be needed when sizing a system. It is strongly recommended that if you are not familiar with designing thermal systems that you consult with your heater supplier to confirm any heater and blower selections.
Many people make the mistake of choosing a heater/blower combination from a catalogue based on the specified maximum flow or temperature values; in reality, there are many factors that influence the correct equipment choice. When you contact your heater supplier they should ask for details of your application to be sure you are choosing the appropriate equipment. If they don’t, we suggest you consider finding an alternate supplier who can ensure that the equipment you purchase is right for your application.