What is the definition of a "view factor" in this case?
The only view factor I know is the one for electromagnetic radiation.
Appears on page 571, EP, BD&C userguide, option 4.
Forum discussion
NC-2009 IEQc8.1: Daylight and Views—Daylight
What is the definition of a "view factor" in this case?
The only view factor I know is the one for electromagnetic radiation.
Appears on page 571, EP, BD&C userguide, option 4.
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Seema Pandya
Sustainability ConsultantSLP
151 thumbs up
April 2, 2010 - 5:10 pm
Hi Jean, unfortunately, for EQc8.2-Views, we also don't see anywhere else that the reference guide has indicated what a "view factor" is. We cross checked it with the last version and found nothing. I would contact the GBCI for clarification.
David Posada
Integrated Design & LEED SpecialistSERA Architects
LEEDuser Expert
1980 thumbs up
July 9, 2010 - 2:55 pm
The "view factor" is defined in the Heschong Mahone Group study that's referenced on that page. It takes a few steps, but you should be able to download the report for free. From the report:
"The Primary View was rated by sitting in the chair in each cubicle facing the computer monitor. The amount and quality of view visible within a 90 degree cone of the monitor was rated from 0=none to 5=largest, based on the
methodology described below. This Primary View represented the view that most employees would have while working on the phone or computer..."
"Figure 23 presents images that visually represent the scale used to assess the view in this study. A view rating of 5 almost completely filled the visual field of the observer seated at the cubicle. A view of 4 filled about one-half of the visual field. A view of 3 represented about one-half the size of a view 4, but still with a coherent view. A view rating of 2 represented a narrow and typically fractured view. A view rating of 1 represented a glimpse of sky or sliver of the outside environment." (Pg 47)
You'll want to take a look at the diagrams that describe the view factors to help in your own assessment.FYI, the link for the "Windows and Offices: A Study of Office Worker
Performance and the Indoor Environment - CEC PIER 2003" report is:
http://www.h-m-g.com/_vti_bin/shtml.dll/downloads/Daylighting/day_regist...