Acquired two units for our front bedrooms as we are on a noisy major highway. Set up them yesterday and the real difference in noise is astounding. I went to the 6.4mm laminated glass and positioned the units over the front with the window sill to give greatest gap. Decrease https://outdoor-security-lights34320.bloggadores.com/26584280/the-thermal-insulation-solutions-in-chelsea-diaries