Cool air at the floor is the key to more efficient heat removal @ the ceiling. Creating a flow up to the Hot Air Axe increasing efficiency.
Server rooms- cool air intakes at floor level, pointing existing A.C. unit cool air supply toward the floor, curtains containing the server heat, room coolers, HVAC ceiling panels replacing conventional panels,
Kitchens - cool air intakes @ floor, curtains to contain grill & oven heat. Creating a calm(windless area) @ the ceiling