This picture is from a recent call I ran that clearly had an interesting past. It had a condensate pump to pump the water just a few feet up to a drain that went to a common drain. The “cleanout” after the trap is supposed to be a vent, not a cleanout, which means it […]

This tech tip was written by a friend of HVAC School, Brian Mahoney. He is an HVAC instructor at Western Suffolk BOCES/Wilson Tech. Thanks, Brian! The podcast on delta T for A/C the other day got me thinking about the formula I learned in school about calculating the GPM of a hydronic system. We will […]

This tech tip was written by Don Gillis with Chemours. Thanks, Don! The shift to R-410A from R-22 brought some pretty big changes to the industry, including the shift to polyolester (POE) oil. We had been using mineral oil for CFC refrigerants like R-12 and HCFCs like R-22, so we had to update some of […]