by John Krigger | Apr 3, 2022
(0.5 CEU; 30 minutes) The noninvasive superheat test lets you estimate the superheat of an air conditioner or a heat pump operating in the summer. Noninvasive means that we don’t have to connect of refrigeration manifold and performing this test doesn’t...
by John Krigger | Apr 3, 2022
(0.9 CEU; 55 minutes) Naturally drafting combustion appliances often spill their combustion products and produce carbon monoxide. Worst-case depressurization testing is an accepted way to discover whether a particular heating appliance is spilling or producing CO...
by John Krigger | Apr 2, 2022
(0.9 CEU; 55 minutes) Human comfort is what we try to achieve in buildings with heating and cooling systems. This micro course explores how the human body responds to heating and cooling systems. Some HVAC systems provide adequate comfort and some don’t,...
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
(0.6 CEU; 40 minutes) The HVAC refrigeration cycle is a very important concept in building science and HVAC. This micro course is a good introduction or a good refresher course, in case you haven’t thought about refrigeration in a while. Most of the content in...
