Question-and-Answer Resource for the Building Energy Modeling Community
Get s tarted with the Help page
Ask Your Question
1

should the below grade portion of the building wall be included in the wall area for purposes of calculating window to wall ratio in BeOpt?

asked 2019-09-02 20:34:43 -0500

skrucial gravatar image

updated 2020-01-07 19:57:48 -0500

When modeling a single family residence, and when the basement is included in the conditioned space, how should i define the wall area? With or without the below grade portion? Further, Does beopt provide an option to include the ration of the basement walls that are above/below grade?

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted
0

answered 2019-09-03 12:08:33 -0500

The wall area, for purposes of window-to-wall ratios, does not include the below-grade wall area. You can confirm this by drawing a building with a slab foundation type, looking at the absolute "Total Window Area [sqft]" that BEopt calculates for a given Window Areas option, and then changing the foundation type to a conditioned basement. Note that the absolute window area is unchanged.

image description

That said, if you have a specific window area you're trying to achieve, you can create a Window Areas option where you specify absolute areas instead of window-to-wall ratios. See the "50sqft, all facades" option as an example of an option with absolute window areas that are unaffected by the drawn building geometry.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

 

Question Tools

1 follower

Stats

Asked: 2019-09-02 20:34:43 -0500

Seen: 1,568 times

Last updated: Sep 03 '19