Enhanced HVAC Effectiveness ? Crafted to help improve your home?s ventilation efficiency, proper air flow can help reduce air flow resistance for less HVAC stress. Cleaner, Healthier Air ? These air conditioner filters help purify the air of dust, pollen and allergens, which can help reduce allergy sufferers itchy eyes and sneezing. Premium Craftsmanship ? Each HVAC air filter is crafted with four layers of high-grade aluminum and two layers of electrostatic media for superior reliability. Quick & Easy Installation ? Each electrostatic air purifier slides into your HVAC system effortlessly in seconds, making it simple to change out your old filters. American Made ? Smith Filter electrostatic air conditioner filters are crafted right here in the United States, so you can trust their durability and long-lasting quality.