When your furnace or air conditioning unit requires a specific filter size, you may struggle to find the right fit. Luckily, Remember The Filter makes it easy to find exactly what you need. We offer an extensive selection of air conditioner and furnace filters in the 20x30x1 configuration with various MERV ratings and specialized features, such as heavy-duty reinforcement and microparticle filtration. We even offer our 20x30x1 furnace filters in a variety of filter styles, including fiberglass, pleated, and washable filters. With our selection, you don’t have to settle for the only filter you can find—order filters with all the benefits you need in a size that fits perfectly. Shop our collection today; you’ll enjoy free shipping regardless of the number of filters in your order.