Quote:
Originally Posted by Calgarian
Seems like one of the rare occasions where there is too much space in a mechanical room. Usually they are extremely tight and every cubic inch is utilized. Also, having the room on the top of building generally eliminates the need for louvers as you can just vent out the top, having it on a middle floor requires louvers as venting up would eat up floor space in the form of shafts.
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In older buildings yes, you'll usually find tight mechanical rooms with equipment shoehorned in there. Newer buildings are giving mechanical areas much more space. Equipment is getting bigger as well as ventilation requirements change.
But no you still need louvres or a vertical opening of some sort for intake & exhaust, you generally can't pull that from a horizontal opening at the top. When you see horizontal openings it's usually for cooling towers. You see less mid-rise mechanical rooms now because most buildings are compartmentalizing on each floor, so the only ducts you need are exhaust and make-up.