Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Here's one clue:
** Warning ** GetHTSurfaceData: Surfaces with interface to Ground found but no "Ground Temperatures" were input.
** ~~~ ** Found first in surface=FACE 0
** ~~~ ** Defaults, constant throughout the year of (18.0) will be used.
You need to specify ground temperatures for proper heat exchange with the floor and the ground, otherwise it assumes the ground is 18C/64F year round.
Also, your walls, floor, and ceiling are R~30, which is extremely well insulated (esp for walls and floors), so I'm not sure that's accurate.
Infiltration can play a significant role in thermal loads, so excluding that and assuming the space is tight with no air leaks, especially around the large window, is probably an inaccurate assumption.
