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.

Choosing a refrigerant charging scale comes down to accuracy, connectivity, Australian support, and whether the features justify the price for your typical job mix. This guide compares Mastercool's charging scale range against Fieldpiece, TIF, and JAVAC options in the Australian market, looks at where each brand sits on value and support, and gives practical recommendations by user type.

Charging refrigerant by weight is the professional standard in Australian HVAC-R work. The Mastercool 98210-BL Accu-Charge II takes the process wireless with Bluetooth monitoring via the Mastercool Connect app. This guide covers what makes the 98210-BL worth the step up, how to get it paired and reading correctly from day one, and the real workflow improvements it delivers on the tools.

Matching the right Testo 420 flow hood to the outlet is the first step to a commissioning result you can sign off on. This guide covers all four hood sizes in the Testo 420 range, explains how to select the right option for square, linear and oversized outlets, and walks through flow straightener maintenance and storage. Practical advice for ARCtick-licensed HVAC-R techs, mechanical contractors, and anyone doing volume flow measurement on Australian commercial or residential sites.

Accurate TAB and commissioning results depend on more than just owning the right instrument. This step-by-step guide covers the complete Testo 420 measurement process: setup, Bluetooth pairing, hood selection and mounting, reading stabilisation, on-site data logging, and the most common errors that cause incorrect readings on real jobs. Practical guidance for Australian HVAC technicians doing commercial commissioning and air balancing work.

A nitrogen regulator is the quiet hero of pressure testing and brazing purge in HVAC. This guide explains how it works, what to look for, and how to choose the right regulator for Australian job sites.

Choose the right Testo Smart Probes for Aussie jobs—115i, 549i, 605i, 410i. See starter loadouts, kit vs individual buys, and faster Smart App reports.