Five hours and for any person with Do-it-yourself techniques it is easy enough. It's lowered noise noticeably Inspite of not becoming with the encouraged distance from the present window. It's also invisible! I have hooked up photographs and it's tough to see the extra unit! Remarkably recommended this enterprise. The https://windowinsulation98754.blogvivi.com/35253812/the-basic-principles-of-noise-reduction