In refrigeration, the systems are so large that pressure tests may take 24 hours or more. During the course of a pressure test, there may be significant changes in the ambient temperature, and you don ...

This common pitch is compelling: Filling your car’s tires with nitrogen will reduce air loss, boost fuel economy, reduce rolling resistance, and improve safety. Some cars are even sold with the ...

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 ...

Focus: Farmers test microbes to nourish crops as climate pressure grows, costs rise By Rod Nickel and Karl Plume February 3, 2022 12:10 PM UTC Updated February 3, 2022 ...

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 ...