by John Krigger | Mar 31, 2022
(0.5 CEU; 25 minutes) This 7-minute video explains the process of evaluating and servicing a typical residential HVAC system. The focus is on troubleshooting and logical progression of tasks. Find your procedure guide under the Materials tab. A short quiz will...
by John Krigger | Jan 21, 2022
(2.5 CEUs) Central air conditioners and heat pumps rely on the refrigeration cycle to provide heating and cooling. This lesson explains the refrigeration cycle in simple language with clear diagrams. You’ll learn the following. How HVAC refrigeration systems...
by John Krigger | Jan 21, 2022
(2.5 CEU) The topic of air conditioners and heat pumps is one of the most difficult topics for energy auditors and energy raters. This course focuses on HVAC appliances, like air conditioners and heat pumps, that use HVAC refrigeration systems, including the...
by John Krigger | Jan 14, 2022
(8.5 CEUs) Refrigerated air-conditioning is the most expensive way to create summer comfort. Low-energy cooling minimizes energy-intensive refrigerated air-conditioning by reducing solar gain, air leakage, and relative humidity. When we reduce heat gains, air leakage,...
