We like to leave the bedroom and office windows open year-round ...
Have used two for three months. We like to leave the bedroom and office windows open year-round for fresh air. The prevailing winds, however, pour over an adjacent mountain and parks. Dust has been a constant issue along with pollen. These window filters work well in considerably reducing both. We also like the flexible tubes on top and bottom which help seal. Airflow is sufficient for our needs.
Rating: 5 stars