What is the definition of 'view factor of 3 or greater'?
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View factor of 3 or greater?
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TODD REED
Energy Program SpecialistPA DMVA
LEEDuser Expert
890 thumbs up
March 23, 2018 - 2:07 pm
Refer to California Energy Commission, Windows and Offices: A Study of Office Worker Performance and Indoor Environment: Technical Report (2003), pp. 8–9, ff. 1–8, (accessed June 12, 2013)
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
494 thumbs up
March 23, 2018 - 3:49 pm
Thanks for the response Todd, much appreciated....but...
I have the standard your referenced, and am still not seeing it. pages 8-9 don't seem include view factor numbers.
what are you referring to when you state "ff 1-8"? (accessed June 12, 2013)?
sorry for the questions, I am a HVAC guy by nature and this credit is a bit out of my comfort zone.
thanks again.
TODD REED
Energy Program SpecialistPA DMVA
LEEDuser Expert
890 thumbs up
March 23, 2018 - 3:55 pm
Start on page 47
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
494 thumbs up
March 26, 2018 - 3:27 pm
Thanks Todd!
I now understand 'view factor' and can confidently tell the project owner that I am positive that they will not achieve this credit on their project :)
Sadhana J
May 12, 2022 - 2:32 am
Hi David,
Could you please explain View factor again here?
Allison Smith
Sustainable Design LeaderHKS, Inc.
42 thumbs up
May 12, 2022 - 5:48 pm
Sadhana -
I recommend looking at the v4.1 credit and considering substituting it. It is more straightforward.
For View Factor - if you are using the online guide it is explained in detail under 'further explanation'. The view factor is determined by the view angle, which is the smaller number of either vertical or horizontal angle; refer to the chart for how that traslates to the view factor. Be sure to take note of the permanent interior obstructions criteria in the credit requirements. Most systems furniture is considered to be a permaenent interior obstruction.
Good luck!