For newer technicians on the job, here are a couple of HVAC service tips about leak testing and evacuating after repairing a system. The best way I've found to leak test a system is to pressurize it ...

PITTSBURGH, March 4, 2025 /PRNewswire/ -- "I wanted to create a remote-controlled valve assembly that could be configured between a nitrogen tank and an air conditioning system," said an inventor ...