i love our Fire Shutters and well worth the expense for keeping inside warmer and cooler, for extra security and flexible instant window shading and as we raise and lower the shutters for shading at different times of the day and not just an expensive addition that will only be used in an emergency and they've also saved the cost of some internal window blinds but make sure they're installed during construction so that all the wiring for the internal controls is built inside the walls and not damage the walls by being added later