HVAC Shop Blog

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.

The Testo 420 balometer is the go-to volume flow measurement tool for Australian TAB contractors. This guide covers multi-point measurement technique, swirl outlet correction, and app-based commissioning documentation across offices, hospitals, schools and data centres. Practical guidance for HVAC-R technicians and mechanical contractors working to Australian commissioning standards.

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.

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.

Learn how the Testo 420 flow hood helps HVAC technicians measure air volume, balance commercial systems, choose the right hood size, use accessories and generate accurate commissioning reports.

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.

The Testo 115i is a wireless clamp thermometer built for HVAC/R technicians who need fast, reliable pipe temperature readings without holding a probe in place. Purpose-built for superheat and subcooling calculations and refrigerant charging workflows, it connects via Bluetooth to the Testo Smart App so both hands stay free for gauges and service valves. This guide covers who should use it, how to get accurate readings, and where it fits in your toolkit.

Surface temperature measurement runs through almost every aspect of HVAC/R service work — from refrigerant charging and compressor diagnostics to coil performance checks and motor overheating detection. Getting it right means using the correct probe type at the right location, with proper contact and insulation. This guide maps the main surface measurement tasks to the probes and techniques that deliver accurate, reliable results in the field.

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.

Surface temperature measurement is one of the most common diagnostic tasks in HVAC-R — and one of the most frequently done wrong. A dirty contact surface, poor probe placement, zero insulation from ambient air, and reading before the display has settled: these four mistakes alone account for most of the inaccurate results tradies bring back from the field. This guide covers correct technique from surface prep through to documentation, so every reading you take is defensible, repeatable, and actually tells you something useful about the plant you're working on.

Stay cool and safe with elderly-friendly AC wash bag cleaning tips. Discover easy, chemical-free methods seniors across Australia use to keep air fresh and power bills low.