Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Yes for sure the rule applies to LOWER internal gains too.
You have to do the area weighted average of internal peak load (process, lights, people) of the spaces originally served by your main system (at the beginning they probably will be all conditioned zone on a floor if there are not 40-h schedule exceptions, or mixing use). Then starts to take off all spaces whose internal peak load differ more than 10 Bth/h-ft2 till to have no one exceeding this threshold value .
You may want to see PNNL-26917 PRM Reference Manual, pag 3.4 (pag 37 PDF)
