Proairtek 18x20x1 Air Filter MERV 11 with One "Diamond" Activated Carbon Tile to Neutralize Odors ensures clean, odor-free air for your home or business. This filter also features an activated carbon layer to neutralize household odors. Its durable electrostatically charged pleated design improves airflow efficiency and lasts three times longer than standard fiberglass filters. Built with an industrial-grade beverage board frame, it resists moisture and high temperatures for enhanced structural integrity. Manufactured in the USA using recyclable materials, this filter offers an eco-friendly solution to maintaining superior indoor air quality. In a typical residential HVAC system, the air should circulate through the entire home about 2-3 times per hour. This is often referred to as "air changes per hour" (ACH). The "Diamond" Tile Activated carbon tile gradually eliminates odors without clogging the Air Conditioner air flow. This small carbon tile allows the filter to be changed less frequently than filters that have a full size layer of carbon fibers, while allowing the gradual elimination of odors. Features: - Pack of 2 air filters - Neutralizes odors with activated carbon technology - Durable pleated design for extended use - Resists moisture and high temperatures - One "Diamond" Activated Carbon Tile (DACT) gradually eliminates odors, without clogging the Air Conditioner air flow Specifications: - Unit Dimensions: 18 x 20 x 1 Inches - Unit Weight: 0.32 Pounds - Shipping Dimensions: 18 x 20 x 2 Inches - Shipping Weight: 0.64 Pounds