by John Krigger | Apr 2, 2022
(1.5 CEUs) HVAC airflow problems are difficult to diagnose and fix. Poor HVAC airflow can dramatically reduce building energy performance, even if the building is otherwise energy efficient. Never assume that HVAC airflow is sufficient for good HVAC efficiency. This...
by John Krigger | Mar 31, 2022
(0.9 CEU; 55 minutes) Airflow and static pressure are directly related to one another. Measuring static pressure is considerably easier than measuring airflow. Thus, we measure static pressure differences in different parts of a forced air system. This micro...
by John Krigger | Feb 9, 2022
(1.5 CEUs) What we call “pressure diagnostics” is a group of tests and observations that help us diagnose and locate air leaks. We do pressure diagnostics during a blower door test. We take measurements of pressure and airflow, which help us to know how leaky a...
by John Krigger | Jan 21, 2022
(1.5 CEUs) HVAC systems are only effective if they distribute the right amount of conditioning to building spaces. Forced-air HVAC systems are notorious for air-distribution problems. This lesson covers conditions that reduce the effectiveness of forced-air...
by John Krigger | Jan 20, 2022
(1.5 CEUs) Pressure is a physical principle that describes the difference in density, elevation, temperature, concentration (or some other measurement) between one place and another. Flow and pressure are related to one another. Pressure causes flow, and flow causes...
