Get noticeably fresher air in your home with these high-performance Filtrete fibreglass furnace filters by 3M. To help you breathe easier and give you peace of mind, these elite allergen filters attract and capture large airborne allergens such as mould spores, dust, and pollen, as well and microparticles like viruses, bacteria, smoke, and smog. Boasting a Microparticle Performance Rating of 2200, these 16-in x 25-in electrostatic filters are 5 times more effective than non-electrostatic versions at capturing small particles. For best results, make sure to replace your air filter every 3 months. Designed for residential use only.