Do you suffer from pollen or dust allergies? Is opening windows and patio doors to allow for fresh air ventilation just not an option for you? Is your AC bill high because you need to keep AC on, instead of enjoying a cool breeze from the outside? Pollen Technology Filter screens look very similar to normal screens but are designed with a unique filtering effect. This screen mesh is designed to block up to 50% more particles than standard fiberglass insect screen.