HVAC Shop Blog

Learn why charging by weight matters, compare Mastercool scale models 98201, 98210-BL Bluetooth and 98315 wireless, and keep your scale accurate with proper calibration

Running refrigerant recovery correctly is more than just connecting a machine and pressing start. This step-by-step guide covers the full Mastercool recovery workflow: pre-job safety checks, high and low-side connection sequence, choosing liquid or vapour recovery mode, monitoring the active cycle, and completing post-recovery documentation to stay ARCtick compliant.

Compare Mastercool and Robinair recovery machines side by side. R32 capability, local support, total cost of ownership and which suits Australian tradies best.

A quality recovery machine is a legal requirement for every ARCtick-licensed HVAC-R technician in Australia — and the right one pays for itself fast. This guide covers how Mastercool recovery machines work, which model in the MC69000–MC69400 series suits your job mix, R32 spark-free requirements, and how to keep your machine running reliably for years.

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.

Mechanical balometer or Testo 420 digital flow hood? This guide compares both across accuracy, swirl outlet performance, data logging, total cost of ownership, and suitability by user type. Practical decision support for Australian TAB contractors, HVAC-R technicians, and facilities maintenance teams.

Surface temperature probes are one of the most-used tools on a working HVAC/R technician's belt. When you need an accurate temperature reading from a pipe surface, motor housing, compressor case or coil, contact measurement gives you something an infrared gun simply cannot: direct thermal coupling with the surface itself. This guide covers probe types, accuracy factors and how to pick the right Testo surface probe for every job.

Most HVAC/R technicians carry more than one temperature probe — and for good reason. Pipe surfaces, motor housings, air streams and liquid temperatures each call for a different probe geometry. A Testo temperature probe kit gives you a matched surface, air and immersion set in a single purchase, all using Type K Class 1 thermocouples that work with any Type K meter you already own. This guide covers what's in the kit, when to choose it over individual probes, and how each probe type is used in the field.

Irreversible temperature labels prove a surface exceeded a set threshold at some point between service visits. Thermometers show what a surface is doing right now. They answer different questions — and knowing which tool to use, when to use both together, and what each cannot do is the key to accurate HVAC temperature monitoring. This comparison guide covers evidence value, live diagnostics, reusability, calibration, cost and combined workflow examples.

Applying a Testoterm temperature label correctly takes less than two minutes — but poor surface prep, wrong threshold selection, hidden placement or incorrect reading are the most common reasons labels fail to provide useful information. This step-by-step guide covers the full application, reading and logging workflow: surface cleaning, full contact application, reading irreversible colour changes, photographing results and replacement after activation.

Temperature indicator stickers give Australian HVAC technicians passive, always-on surface-temperature monitoring across compressors, motors, switchboards, pipework and refrigeration cabinets — without power or data connections. This guide maps the right indicator format to each equipment type, covers threshold selection for Australian climate conditions, and includes an implementation checklist for service teams managing large commercial portfolios.

Testoterm Measuring Points are 14 x 14 mm single-threshold irreversible labels sold in booklets of 50 — designed for QA checks, warranty validation and recurring fleet inspections across HVAC motors, compressors, control cabinets and plant-room equipment. This guide covers threshold selection across the 65–121°C range, placement guidance, comparison with Mini Indicators, and logging and replacement workflow.