The topic of static pressure comes up frequently in HVAC, and it’s sometimes presented as a test that can be all-knowing and insightful about what is happening with regard to airflow in a system. To use static pressure responsibly, we need to understand what it really is and what it means for an HVAC system. […]

Evaporator temperatures below 32° are common and acceptable in refrigeration; that's why there is a defrost sequence. In a heat pump running in heat mode, it's the same; freezing is a part of the process, and defrost is necessary. In comfort cooling, we can't allow the evaporator to get below 32°, or it will freeze. […]

When you think of a salesman, what comes to mind? Do you imagine a quiet person who helps you solve your problems by listening and evaluating you as a customer? Probably not.  When most people hear the word ‘salesman,' they imagine a flashy personality who will talk to you for hours to try to get […]