Michael Housh from Housh Home Energy in Ohio wrote this tip to help techs determine the air-side charge on a pressure tank. Thanks, Michael! Determining the air-side charge of an expansion tank in a hydronic heating system is a relatively easy task.  A properly sized and charged tank is designed to keep the system pressure […]

Courtesy of Emerson It is important to have refrigerant that is free from debris and contaminants, and we control these issues on many different fronts. 1. Proper tubing handling preventing copper shavings, dirt, and water from entering while installing. 2. Flowing nitrogen while brazing to prevent carbon build-up. 3. Deep vacuum of 500 microns or […]

My good friend and contributor to HVAC School, Neil Comparetto, made this video showing how he creates access ports for static pressure and gas combustion analysis. As techs, we find ourselves in the tough position of needing to drill access holes to take measurements, but the drilling and sealing of the holes can sometimes create […]