Our project is a large high rise dorm consisting of 4-person suites arranged typically as a 2BR and two 1BR's connected by a short inner hallway. The suite has a shared single bathroom accessible from the inner hallway. The inner hallway is very narrow and not occupiable for any duration. Our current scheme includes bathroom exhaust at 50-cfm continuous. Fresh air (neutral, i100% outside air) is delivered at 50-cfm to the hallway only (not each bedroom). The 50-cfm of OA meets the total suite ventilation requirement based on the 5-cfm/person + 0.06 cfm/sf requirement of ASHRAE 62.1-2007. The doors to each bedroom are undercut to allow the fresh air into the bedrooms. Would the above scheme meet the requirements for mechanical ventilation per ASHRAE 62.1 for all spaces in the dorm suite?

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Andrew Mitchell, P.E.

Principal

Mitchell Gulledge Engineering, Inc.

LEEDuser Expert

97 thumbs up

Fri, 11/06/2015 - 23:21

No, that would not meet the requirements for mechanical ventilation. Mechanical ventilation should have some way of making the air come into the occupiable space.

Michelle Robinson Schwarting

LEEDuser Basic Member

98 thumbs up

Sat, 11/07/2015 - 02:08

Any chance the bedrooms have operable windows such that they meet the naturally ventilation requirements in terms of size, while the inner hallway is mechanically ventilated?

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