Gray Bros Air Conditioning

29/10/2026

We are proud to be sponsoring the Queensland Fiji Rugby League in the upcoming season 🏉

Uniforms look great, let's go team!

28/10/2026

Here's a look inside one of the plantroom upgrades we’ve been working on 👀

Air handling units, ductwork, ventilation and the mechanical plant are now all working together to create the best efficiencies and performance for the building's HVAC system.

Upgrades like this in commercial buildings are always a challenge for the team, who are often working in live environments.

Well done to everyone involved.

Find out more about our commercial mechanical services at https://www.graybros.com.au/commercial-air-conditioning-gray-bros.

22/10/2026

20/10/2026

Taking over a building often means inheriting its mechanical services too.

And the history isn't always straightforward:

- When was the equipment last serviced?
- Are there recurring faults that keep coming back?
- Which assets are nearing the end of their useful life?
- Are there maintenance issues that need to be prioritised?

Understanding what you've got is a good starting point for making informed decisions about what needs attention now, what can wait, and what needs planning for the future.

It helps turn a list of equipment into a clearer picture of the building's mechanical assets.

We’re here to assist if you find yourself in this situation. Contact us at https://www.graybros.com.au/commercial-air-conditioning-gray-bros

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15/10/2026

Every theatre needs great acoustics.

And every theatre needs the mechanical systems to stay quiet.

The team has completed the full mechanical fit-out of the Avalon Theatre at UQ St Lucia. A space like this required careful consideration of how the building’s mechanical systems operate without distracting from what’s happening on stage.

Airflow, temperature control and coordination of services were all important on this project. We needed to make sure:

🎭 The audience stays comfortable.
🎭 The performers don’t melt under the stage lights.
🎭 Mechanical noise stays to a minimum.

So they can get on with the show.

Find out more about our commercial HVAC services at https://www.graybros.com.au/commercial-air-conditioning-gray-bros

14/10/2026

Commercial kitchens work hard, and the ventilation behind them has a big job to do.

From extraction canopies to airflow and temperature control, we’ve worked across commercial kitchen HVAC installation, service and maintenance on many projects just like this one in SE Queensland.

Commercial kitchen fit-outs need a setup where effective ventilation is essential, for this project it included:

✓ Kitchen exhaust and extraction to remove heat, smoke, grease-laden air and cooking odours.

✓ Make-up air and ventilation to maintain airflow balance and reduce excessive heat build-up.

✓ Air conditioning and temperature control to help manage the heat generated during busy service periods.

✓ Ongoing service and maintenance to keep ventilation equipment performing efficiently and identify issues before they become bigger problems.

Get in touch to find out more about how we do this: www.graybros.com.au.

29/09/2026

The ‘before’ and ‘after’ images of a recent project at a 17-story mixed-occupancy building - comprising of hotel accommodation and privately owned apartments.

Each apartment is serviced by chilled water fan coil units incorporating electric heating elements and the base building is served by two 900 kW chillers, supplying approximately 6.7°C chilled water to the building 24 hours a day.

The Problem
Regular machine logs identified that the condenser approach was higher than expected and had been gradually increasing over time.

During annual servicing, further investigation identified significant deterioration of the condenser sacrificial anodes. The removed anodes were almost completely disintegrated, with a significant accumulation of scale, rust and debris settled within the base of the condenser tubes. The condition of the condenser indicated that water-side fouling and corrosion were contributing to the reduced heat transfer performance.

The Solution
The team carried out the repair, including:
- Mechanical cleaning and descaling of the condenser tubes
- Removal of scale, rust and debris
- Cleaning and corrosion treatment of affected components
- Replacement of sacrificial anodes
- Fabrication and installation of a new gasket
- Recommissioning and performance testing

Following the works, the chiller demonstrated improved condenser performance and operating efficiency.

The important part wasn't simply restoring the chiller, it was identifying and addressing the underlying condition before it could lead to further deterioration, increased energy consumption or unplanned downtime.

It’s a good example of why regular monitoring, planned servicing and preventative maintenance matter for critical HVAC assets.

Contact us to find out more about this case study a www.graybros.com.au.

24/09/2026

A throwback to a great project delivered by the team 👈

The mechanical scope on this one was extensive, including Mitsubishi VRV systems, outside air and dehumidification, specialist oil mist and welding fume extraction, compressed air, BMS controls and associated mechanical and electrical works.

A major focus throughout the project was the commissioning process, with detailed planning, coordination, testing and documentation required to meet the project’s BREEAM certification requirements.

It was a challenging project with a lot of different systems and interfaces to bring together, and ultimately the BREEAM certification was achieved with a strong result.

Good project to look back on and one that helped shape how we approach commissioning and project delivery today.

17/09/2026

We were back on a local rooftop this week, checking the performance of the equipment – and making sure there was no deteriorating or efficiency reduction, given it was in a coastal environment.

The team were there to identify what's changing before it becomes a problem for the building owner, and our regular check-ups optimise the performance and extend the equipment lifespan.

For building owners and facility managers, that means better visibility of the condition of the equipment - and more time to make decisions, especially with the warmer months approaching.

Find out more about how we do this at www.graybros.com.au.

11/09/2026

Our Coorparoo Colts are into another big finals battle this weekend – it’s a knockout or one win away from the Grand Final.

We’re proud to support the Coorparoo Senior Australian Football Club club and the young players who have put in the work all season.

Good luck to the team - bring it home!