Hi Everyone,
I am attempting Exemplary Performance for IEQ 8.2 and in order to receive this extra credit you have to pass 2 of 4 critera being:
1) 90% of all regularly occupied spaces need at least 2 views to the exterior with at least 90 degrees between the views
2) 90% of all regularly occupied spaces need views of at least 2 of the following: vegetation, human activity or objects not within 70' of the exterior window
3) 90% of all regularly occupied spaces require unobstructed views located within the distance of 3 times the head height of vision glazing
4) 90% of all regularly occupied spaces need access to views with a view factor of 3 or higher (per the Heschong-Mahone Group Study)
I understand the first 3 and how to document their requirements, but unfortunately my project only gets more than 90% for only one of them so in order to get this credit I have to document option 4.
As this method is new for V3.0 there is not a lot of examples and information on how to document this point based on the Heschong Mahone study, so any help from the forum would be most helpful. I am planning to take pictures from all spaces towards the window in that space from a typical seating location. However, the way that this study measures its view factor is very subjective and you need to measure an imaginary angle to decide whether your view may be a 2 or a 3.
Please help
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11475 thumbs up
December 28, 2010 - 11:24 pm
Andrew, I have asked around extensively and found no one who has attempted this path. I think you are a pioneer! Let us know what you learn! Perhaps the Heschong-Mahone Group would have input?
Andrew Slusser
DesignerFlad Architects
13 thumbs up
January 10, 2011 - 12:08 am
Thanks Tristan for asking around, we have recieved comments back, but I haven't had time to look at them, I think the exemplary performance part is still under review, definitely will keep you and the forum up to date on the result. If there is still clarity that needs to be resolved I may call Heschong-Mahone...
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11475 thumbs up
April 23, 2011 - 12:25 pm
Hi Andrew, have you learned more on the EP path here since your review comments?
Bonnie Chiu
32 thumbs up
June 29, 2011 - 3:06 pm
Andrew and Tristan, I am also attempting to achieve the EP point for this credit. My first concern is: Does Measure 4 only apply to office spaces since the Heschong- Mahone study is of office spaces? I am working on a college residence hall and it seems to have over 90% of the room that will meet the >view factor 3 criteria.
For the documentation part, I cut a section through a typical unit and draw a 42" tall horizontal line from the window to the back wall of the room. Then connect that point to the top and to the bottom of the window and measure that vertical angle. Show that angle is >11degree to qualify a view factor 3 or higher. I also have a plan view of the room showing the horizontal angle of the window to critical points in the room is over 11 degree.
I do have a question about Measure 2. Can a view qualify for the vegetation and human activity requirement if one has to look down the window to see it?