Natural ventilation - 5.1.1

Dear all, We are working on a project with 418,000 sf with mechanical ventilation of OA in most of the spaces and a non-24 hours chiller. There is a small space with 110 sf and one person, with 24-hour occupancy and a independent HVAC system. We are pursuing credit IEQc2 and IEQc5, then it's not practical to use a fan with 30 ft long duct and MERV 13 for 20 cfm OA flow rate. For this reason we want to use natural ventilation for this space. The space doesn't have a direct opening to the outdoors but there is a shaft with an opening to the outdoors on the top that runs alongside the space. Can we design an opening connecting the space with the shaft with an opening of 4% of the net occupiable floor area and comply with the section 5.1.1 from ASHRAE 62.1-2007? We would be assuming the shaft as outdoors with this approach, since it has a free opening to the outdoors on top.