Our 10x25x1 air filters help keep a home’s air supply clean and healthy. Our 10x25x1 air filters fit in various-sized HVAC systems. Once properly installed, air passes through it, and the media catches particles such as pet dander, dust, and (in some cases) bacteria. This is a continuous process that will occur every time air goes through the media. Over time, the media will get clogged, so you will need to replace the 10x25x1 air filter. The replacement timeframe will change depending on which 10x25x1 air filter you purchase. Our 10x25x1 furnace filters and air filters are environmentally friendly due to their one-piece design, and there’s free shipping on all orders.