Bayswater Car Rental, part of the No Birds group, has offices across central Perth. One of them sits in a high-density part of East Perth, surrounded by residential apartments.
The problem
The office’s rooftop air-conditioning (HVAC) plant was loud enough to trigger numerous complaints from the apartments around it.
What we did
- Designed a custom modular barrier system, light enough to install by hand but heavy enough to block the noise.
- Laid it out to give the plant maximum air intake and maximum air outlet, without the two mixing.
- Built in space for maintenance and shutdowns, so technicians can still reach the units.
The result
The rooftop plant runs as designed, with its noise contained and servicing access kept clear.
Tip from Nigel: rooftop plant needs to breathe. A barrier that blocks the airflow just swaps a noise problem for a breakdown.


