Hi all

We have three Warehouse's that use 'turbo ventilators' (wind driven extraction fans) and not a pure mechanical system. The warehouses also do not have enough enough openings to meet the natural ventilation requirements of 5.1 in ASHRAE 62.1.

To meet the requirements of IEQp1 I feel my only option is to motivate that the this is an 'Engineered natural ventilation system' as per the exception to 5.1 in ASHRAE 62.1. In the wording (and confirmed in CIR ID#2539);

'An engineered natural ventilation system when approved by the authority having jurisdiction need not meet the requirements of Sections 5.1.1 and 5.1.2. '

South African building codes don't deal with turbo ventilators directly, and because warehouses do not have a minimum ventilation requirement here the designs/drawings were approved by the authority having jurisdiction (AHJ).

The issue is they would definitely be approved by AHJ because there is no minimum requirement.
But this is like simply using a less stringent code, which is not the intent.

How can I show compliance with IEQp1 for these areas?