We use the pollen guard for 2 years and are satisfied. The argument that you can not ventilate is baseless. That's a pollen guard. It should therefore protect against pollen. When airing grand ago, will no longer need the protection, because then comes the pure yes what one wants to protect. Comes especially through the grid quite yet filtered air. The view outside is suffering really, but either you sleep quietly, or you look the whole day through the window. The priority for us at the sleep and is much quieter Seidem we have the grid. At least relieves the grid the complaints.
