A wise man once reminded me that air is the first word in air conditioning. A hidden gem to help measure airflow is found in the installation instructions and specifications of any air-moving equipment — this gem is a fan-performance table. These tables provide a simple way to determine how much air is moving through air-handling equipment in a short amount of time.
These tables are specific to the equipment they come with, as fans are rated a little differently between manufacturers. By gathering information on fan speed, nameplate information, and total external static pressure, you can quickly determine fan airflow with the tables. Let’s look at five steps you’ll need to know so you can master this skill.