Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The answer to all your queries in part lies with interaction between solar loads the envelope/glazing systems for the building.
Northern-hemisphere buildings with particularly decent envelope/roof insulation levels should observe their peak cooling days shift away from the hottest ambient days of the year (with the sun arcing overhead) towards a time of the year when more Southerly sun angles penetrate more often & more directly onto the building glazing.
Window shading/overhangs, fenestration properties (i.e. SHGC) play a role in this interaction as well, of course.
Ultimately I don't think any of these trends are particularly "right" or "wrong," but are symptoms of a building where solar loads are the dominant component for determining peak cooling loads (as opposed to envelope conduction or internal gains leading the charge).
