350x75 Low profile duct

350×75 Low Profile Duct | Pro-Air Supplies

The 350×75 mm low profile duct is one of the most common flat channel duct sizes used in commercial HVAC installations across Australia. 

Its rectangular design allows efficient airflow while fitting neatly within tight ceiling cavities, making it ideal for apartments, hotels, offices and multi-residential developments where space is limited.

With its larger internal area, the 350×75 duct can typically handle airflow up to approximately 160–190 L/s (575–680 m³/h) when installed correctly, while maintaining good air velocity and low-pressure loss. The smooth internal surface helps improve airflow efficiency and reduce system noise.

At Pro-Air Supplies, the 350×75 low profile duct is a preferred choice for bathroom exhaust, laundry ventilation and general commercial ventilation systems, providing contractors with a reliable, easy-to-install and high-performance ducting solution.

Pro-Air Supplies stocks 350×75 low profile duct systems for HVAC contractors across Melbourne and Victoria. Available for pickup from our Pakenham warehouse or delivery across Australia.