Unilever Capsule Production Hall HVAC Upgrade, North Rocks

QEG was engaged by Unilever to resolve persistent humidity control issues in the capsule production hall at the North Rocks site. Following site inspections and coil supplier consultation, we determined that the existing chilled water coils could not deliver the deep cooling required to maintain ~35% RH, and proposed a design-and-construct package centred on two new 10-row-deep chilled water coils operating with 2 °C entering water temperature and 5 °C supply air for maximum dehumidification. The scope also included reusing the existing steam reheat coils, positively pressurising all five production-hall air locks with dry conditioned air, relocating return air to the opposite wall with low/high-level pickups, introducing a code-compliant fresh-air component, modifying the BMS control philosophy and rebalancing the chilled water and air systems. Works were progressively expanded through approved variations covering additional ductwork, registers and minor control modifications.