We're working on a project that will install a film on indoor glazing partitions for privacy purposes in meeting rooms and some private offices.
1) Do we have to include this film within our daylight model?
2) Is there a min/max threshold which defines when we have to acknowledge (or not) this film in the glazing partitios of our model?
15 thumbs up
March 20, 2023 - 7:40 pm
Hi, if the film just lowers the VT, you can approximate it by lowering the VT of the glass its being placed on (e.g. 80% transparent film on 60% glass ~ 48% VT glass).
According to LM-83-12, p 8, 5% accuracy is asked for in these models.
Brightworks SustainabilityBrightworks Sustainability LLC
46 thumbs up
March 21, 2023 - 1:55 pm
This would mean that the glazing portion of the film will have ~48% of the glazing’s VT. If my glazing has 84VT, the total assembly would be ~62VT?
48%*84VT=40VT (Film portion)