Hi all,

My situation:
Outdoor air: 30C, 90%RH
Indoors: 5-level retail building served by 1000 RT of chilled water air conditioning

Some areas near entrances are consistently too warm, thought to be due to outdoor air coming in, through the people-sensing-auto-sliding-glass-doors.
The opening is about 2m wide by 2.4m tall.
Condensation is also often seen on the cold air outlet grilles.

I have a suspicion that air-curtains aren't very effective if there is mass air flow due to pressure differences.
i.e. an air curtain might be effective for a walk-in freezer since it is quite small, and is close ended. But for a multi-level retail building, there are bound to be changing pressure differentials, due to multiple doors at the perimeter of the building opening and closing, and also due to imbalances of the air distribution.

Are some characteristics of air curtains superior to others?
Faster is better?
Downward blowing versus door-mounted vertical-axis side-blowing?
Should the air-curtain be situated to blow indoor air or outdoor air?