This air filter is designed for use with air conditioners. It helps keep your appliance running efficiently and improves air quality. It filters large particles and allergens out of the air such as dust, dander, pollen, and mold. This filter measures approximately 7 inches by 17 1/4 inches. This replacement part is easy to install, it should fit into your unit with no assembly. When you are installing it, make sure it fits snuggly into place, this will ensure air travel through the filter instead of around it.