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

Modelling internal doors

asked 2022-03-02 06:32:17 -0500

RV's avatar

updated 2022-03-02 13:53:55 -0500

Hello, I have a very basic question. When modelling doors between two adjacent rooms (internal door), does the door need to be modelled in the two adjacent surfaces, or in one of the adjacent surfaces is enough?

Thank you.

edit retag flag offensive close merge delete



My opinion: a door between two spaces which have near-identical temperatures need not be modeled at all. Even if the spaces have somewhat different temperatures, the door is probably a small percentage of the wall and affects energy insignificantly. I sometimes ignore even exterior doors when there are few and their U-value is not too different than the adjacent wall. When an exterior door has glazing, however, it gets included in my model.

Jim Dirkes's avatar Jim Dirkes  ( 2022-03-03 04:45:42 -0500 )edit

OK, it makes sense., thank you for your answer.

RV's avatar RV  ( 2022-03-04 04:05:13 -0500 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2022-03-03 01:20:29 -0500

MHall's avatar

It need to be modelled in both surfaces.

edit flag offensive delete link more


I take it that in the case one wants to model the door, even though an internal door might have an insignificant contribution, it then needs to be modelled in both surfaces.

RV's avatar RV  ( 2022-03-04 04:06:42 -0500 )edit

Your Answer

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

Add Answer

Training Workshops


Question Tools


Asked: 2022-03-02 06:32:17 -0500

Seen: 241 times

Last updated: Mar 03 '22