Bought 2 models for our entrance bedrooms as we're on a noisy major road. Mounted them yesterday and the difference in noise is remarkable. I went to the six.4mm laminated glass and positioned the models about the entrance with the window sill to give maximum hole. Just lifted into https://sub-zero-nightlife-experi71481.blogrenanda.com/40973266/5-easy-facts-about-energy-efficiency-described