Elevate your home's air quality with the Filtrete 18 in. W X 18 in. H X 1 in. Ultra Allergen Filter, a high-efficiency pleated filter built to combat everyday allergens and unseen irritants. With a 1500 MPR rating and electrostatic pleated media, this filter is designed to capture a broad range of contaminants in a single pass, helping your HVAC system breathe easier and your indoor air feel cleaner.
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Precise fit and build — nominally 18x18x1, with an actual size of 17-5/6 x 17-5/6 x 7/9. This non-trimmable design fits most standard 18x18x1 filter slots and maintains a stable, uniform pleat structure for consistent performance.
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Advanced filtration that matters — MPR 1500 indicates elevated filtration efficiency, paired with electrostatic charge to attract and trap particles. It’s engineered to filter bacteria, viruses, pollen, smoke, dust and lint, and mold spores, delivering noticeable improvements in air clarity.
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Durable, simple design — a sturdy cardboard filter frame provides reliable support for the pleated media, helping maintain airflow and filtration efficacy over time.
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Ideal for real-life needs — perfect for allergy and asthma-prone households, pet owners, urban environments with higher particulate loads, and spaces where smoke or mold concern you. This filter helps reduce airborne irritants that flare symptoms and affect comfort.
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Convenient replacement — designed as a standard 1-inch depth filter, intended for straightforward swaps as part of routine HVAC maintenance. It comes in a single-pack, ready to install when you see it’s time for a change.
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Practical installation tips — install with the proper airflow direction indicated on the frame to ensure the pleats widest surface area are positioned for optimal capture, and replace at your system’s recommended maintenance interval for best results.
With the Filtrete Ultra Allergen Filter, you don’t just filter air—you invest in a healthier indoor environment. The combination of pleated media, electrostatic filtration, and a high MPR rating is designed to deliver clearer air across daily activities, from cooking and cleaning to lounging and sleeping. Choose this filter to support cleaner air in spaces where people live, work, and breathe most.
