Author: Ed Janowiak

This introduction to static pressure discusses the basic elements of vital measurements and how they can be used. You can quickly identify HVACR equipment in new or like-new condition with airflow problems. This can save you a warranty call for a burned-out motor or maybe a callback for a poorly performing duct system (or incorrect fan speed setting).

Over the next few months, Ed Janowiak will cover topics about measuring airflow, focusing on airflow measurements and how important it is to follow “the rules.” This month, he’s covering static pressure measurement.

Do you like the sun shining on your face on a cold winter morning? ACCA’s Ed Janowiak does, but that’s not the case on a hot summer day. Strategies like opening the blinds to take advantage of the free BTU’s in the winter, and pulling the blinds closed to keep the sun out in the summer are great ways to stay shady. But, do these strategies help to get more run time out of your system?

Acknowledging shade is a big part of doing a load calculation. Sometimes it’s done correctly and sometimes it’s done incorrectly. The more accurate we are with our inputs the more predictable our results will be. There are hard and fast rules that should be followed in Manual J. Some of the more important ones are discussed in this article.