HVAC Shop Blog

Proper evacuation is the difference between a system that lasts and one that fails early. This step-by-step guide covers the complete Mastercool vacuum pump evacuation procedure: pre-job checks, starting the cycle, reading the micron gauge correctly, troubleshooting plateaus and leaks, and interpreting the decay test before you charge. Written for ARCtick-licensed technicians and apprentices learning the right habits from the start.

R32 is now the standard refrigerant across most Aussie HVAC-R installs — but its A2L classification means your vacuum pump needs to be spark-free, not just capable. This guide covers why standard brush-motor pumps are a safety risk on R32 systems, how spark-free brushless DC technology works, and what's actually different about evacuating an R32 system versus R22

Choosing the right vacuum pump can make or break a commissioning job. This complete guide covers Mastercool vacuum pump models, CFM ratings, dual-stage technology, R32 spark-free options, and maintenance — everything Aussie HVAC-R tradies need to pull a deep, verified vacuum every time.