I'm working on a project that is a small office building and is completely naturally ventilated (has only wall mounted AC units), no duct work. We use only operable windows for ventilation (however they may use standard plug-in fans - will have to ask). I'm concrened about showing compliance with this credit. Any advice from others who have been there? I realize I will need to fill out the table in leedonline showing that the operable window size per occubiable sq.footage meets the requirments. However, do I need to include un-occupied space such as our warehouse and storage closets? What about our small hall way area?
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11477 thumbs up
October 11, 2010 - 1:05 pm
Nelina, for starters, have you reviewed LEEDuser's step-by-step guidance above under the Checklists tab?You'll need to follow ASHRAE 62.1-2007 section 5.1 for this credit, which iincludes required ventilation rates for different space types. I don't know offhand about the warehouse and hallway, but I'm guessing there are required rates for those spaces (since they are occupied, if not "regularly occupied").
Nelina Loiselle
Above Green239 thumbs up
October 12, 2010 - 10:20 pm
Yes, I did review all your info. However, there reallly is not much on naturally ventilated spaces, so I did not find it helpful. I will read the ASHRAE code.
Nelina Loiselle
Above Green239 thumbs up
December 2, 2010 - 4:39 pm
So you do have to inculde all rooms/spaces in a building - such as restrooms, storage closets, and hallways?? Or just regularly occupied spaces - seems to be some contradictory info on LEED User.
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11477 thumbs up
December 28, 2010 - 11:36 pm
Nelina, where is the contradictory info? I'd love to clear it up....
Roger Chang
Principal, Energy and Engineering LeaderDLR Group | Westlake Reed Leskosky
LEEDuser Expert
398 thumbs up
February 9, 2011 - 5:22 pm
There was a similar discussion on unoccupied spaces, which I'm recopying here:
Interpretation IC 62.1-2007-17 of ASHRAE 62.1-2007 clarifies that electrical rooms, storage rooms, telecommunication/data, telephone/data entry, and elevator equipment rooms don't require the per square foot ventilation rate if they are unoccupied the majority of the time. Addendum 'd' or 62.1-2007, which will be included in 62.1-2010, incorporates this interpretation.
http://www.ashrae.org/technology/page/1412