Acquired two units for our front bedrooms as we're on a loud major street. Set up them yesterday and the real difference in noise is amazing. I went with the 6.4mm laminated glass and positioned the units on the entrance of the window sill to provide highest hole. Enhanced Thermal https://choosingpendantlighting02210.pointblog.net/a-secret-weapon-for-acoustic-secondary-glazing-75031516