Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Hey Banicu,
Firstly, thank you for the repply. I will keep applying the same methodology as you, modifying only the specific parameters provided in table 2 from GN 25.
I had similar results some months ago while working on a building that has approx. 80% glazing/wall ratio. My climate is 3C. However, I decided not to implement the glazing related inputs from GN but instead to input the U-values and SHGC from the actual design as GN25 sates:
"The best Practice specification U-values indicated in table 2 should only be substituted for the actual design U-values where they will result in a reduction in the buildings total heating and cooling demand. Where the best practice specification U-values result in an increase in the buildings heating and cooling demand, compared to the actual building design, the original U-values should be used for the BREEAM best practice specification model. This may be the case in warmer climates where the cooling load dominates."
BR
