Airfoil’s Australian Made 20mm Polyurethane Foam Pre-Insulated Poly Board Return Air Plenum Box (PB-RAB-S) is a lightweight, fire-rated alternative to sheet metal. Its aluminium-coated exterior, treated with a durable epoxy varnish, ensures enhanced insulation and long-lasting reliability. The PB-RAB-S gathers return air from the conditioned space and channels it back to the HVAC system, maintaining optimal air circulation and ventilation.
Offering flexible Side Entry spigot placements, including Opposite and Adjacent options, the PB-RAB-S can also be configured with a Top Entry spigot (PB-RAB-T) for direct return from behind the grille. Designed to integrate seamlessly with Airfoil’s Return Air Grille range, this plenum box is ideal for commercial settings where superior thermal and acoustic performance is essential, showcasing Airfoil’s dedication to high-quality Poly Board solutions.
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