I am working on a project that has two regularly occupied spaces that do NOT have two 90 degree apart windows. I am instead going for Type 2 and Type 4. However, I do not know what to put in the quality views calculator for "Area with Direct Line of Sight to the Outdoors via Vision Glazing (sq ft)" as i cannot calculate it like with Type 1. Should I leave it blank? If not, how do I calculate it? Please help ASAP
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TODD REED
Energy Program SpecialistPA DMVA
LEEDuser Expert
890 thumbs up
September 24, 2018 - 9:33 am
The are with direct line of sight to the outdoors is the area which meets the requirements of both of the view types you are attempting. You calculate it by following the step by step guidance and required documentation section of the reference guide. If you have specific questions in regards to that i suggest you post that here on in a separate post.
Elissa Wu
2 thumbs up
September 26, 2018 - 10:48 am
Hi Todd,
Thank you for your response. But I still do not know how to calculate a room's area of direct line of sight to the outdoors in a room with one window. It meets the criteria, I just do not know how to calculate the area. Do I measure 15 feet back from the window and that is my area?
TODD REED
Energy Program SpecialistPA DMVA
LEEDuser Expert
890 thumbs up
September 26, 2018 - 3:10 pm
Refer to the LEEDv3 reference guide diagrams in the views credit to see how to determine views to the exterior. The v4 reference guide diagrams are not as instructive as the v3 to help you.
Elissa Wu
2 thumbs up
September 27, 2018 - 11:22 am
Do you mean LEEDv2009? I looked at the 2009 handbook and it does not have any diagrams for IEQ VIEWS, but it does for daylight. The book still does not help with calculations
TODD REED
Energy Program SpecialistPA DMVA
LEEDuser Expert
890 thumbs up
September 27, 2018 - 11:37 am
Elissa,
Is this is your first LEED project? Page 570 of the LEED v2009 (yes v3 and v2009 are the same) shows the plan diagram as to how to draw view lines from the windows to determine the interior area that has views to the exterior. This is what you need to do along with some other things, but it is the base. If that does not answer what you are looking i would say the next step would be to sit down with someone and have them physically show you how to do this. It's somewhat hard and in my opinion time consuming to write out the steps and explanations needed to get you where you need to be. You can contact me via a private message if you'd like.
Julie Hendricks
PresidentSage Building Revival
163 thumbs up
August 15, 2021 - 7:26 pm
This is an old thread, but I think I can help answer this question for any that still have it. I was also confused about how to calculate the floor area with a direct line of sight in rooms with one window on one side of the room, which is a very common situation! The LEED v4 Reference Guide doesn't include any diagrams that address this, but LEEDv2009 does include one diagram that is helpful. (The example is in Figure 4, page 570 of my LEED 2009 BD&C edition. I'd attach it here but that doesn't seem to be an option). It shows lines of sight being drawn from the centerline (in plan) of the window, through the edge of the window frame, and out to the walls on either side of the window. This creates two triangles on either side of the window whose area must be excluded from the view area.