I've recently seen heated debates in different HVAC groups about whether it is okay to recharge a residential HVAC system with R22 without locating and repairing the leaks. I've had residential customers call me and complain about other companies telling them they must replace their system because it leaks. They've also stated that it is […]

DISCLAIMER: I have no financial interest in HVAC Simulator or Dirk’s company, Nauman Innovation Group LLC. He is not a sponsor; I just think he’s a great guy who cares a lot about the industry, and I’m excited to share his work with other people who want to improve training and education in the skilled […]

Basic Compressor Functions The compressor's job is to circulate refrigerant through the system by means of vapor compression, similar to the way your heart moves blood through your circulatory system. Refrigerant circulation is measured in lbs/min or lbs/hour; this is called mass flow rate—the mass flow rate changes depending on the density of the refrigerant […]