by John Krigger | Mar 31, 2022
(0.7 CEU; 45 minutes) Building pressures cause the infiltration of outdoor air and the exfiltration of indoor air. Unbalanced airflow between supply and return ducts can cause positive pressures in some rooms and negative pressures in others. Duct air leakage in...
by John Krigger | Jan 21, 2022
(1.5 CEUs) This lesson explains how to do major duct repair and duct air sealing. For example, sometimes the furnace and the main duct aren’t well connected, causing the worst air leak in the home. This course explores how to fix this furnace-duct problem and...
by John Krigger | Jan 21, 2022
(1 CEU) Ducts can be a major energy-waster. This lesson presents an outline and overview of duct energy-efficiency problems. Ducted airflow, duct air leakage, duct heat transmission, and where the ducts are installed all affect the energy efficiency of forced-air HVAC...
by John Krigger | Jan 14, 2022
(5.0 CEUs) This course explores the many aspects of duct energy efficiency, including these: duct air sealing, duct insulation, and airflow through ducts. The purpose of this course is to help you think about ducts holistically and to understand how ducts affect...
