21x21x5 Air Filter MERV 11 for Pet & Allergy Defense

The 21x21x5 air filter from Filterbuy is designed to enhance your HVAC system's efficiency while providing superior protection against allergens and pet dander. This product is a must-have for anyone looking to maintain a healthy indoor environment. With an actual size of 20.63 in x 20.63 in x 4.38 in, these filters fit perfectly in various furnace and air conditioning units.

Featuring a MERV 11 performance, these filters effectively capture up to 95% of dust and allergens without restricting airflow. This means you can breathe easier knowing that your home or business is protected from harmful particles. The synthetic media used in these filters is comparable to MPR 1200 and FPR 7 ratings, ensuring that you receive top-notch filtration.

One of the standout features of the Filterbuy air filters is their lasting filtration capability. Made in the USA, the electrostatically charged media with 8 pleats per foot traps more microscopic particles than traditional fiberglass models. This design allows the filters to last three times longer, making them a cost-effective choice for your home. For optimal performance, it is recommended to replace these filters every 90 days.

Installation is a breeze thanks to the superior construction of these filters. The recyclable beverage board frames with dual wire backing outperform basic cardboard designs, providing improved durability and resistance to extreme temperatures. This means you can trust that your filters will hold up under various conditions, ensuring consistent air quality.

These filters are compatible with several models, including Rheem and Ruud Filter Part Numbers (PD540018) and Protech models (540012, 540018, PD540012). This versatility makes them a reliable choice for many HVAC systems, ensuring that you can find the right fit for your needs.

In summary, the Filterbuy 21x21x5 air filter is an excellent investment for anyone looking to improve their indoor air quality. With its whole house replacement capability, MERV 11 performance, and easy installation, this filter is designed to meet the needs of pet owners and allergy sufferers alike. Don't compromise on your health; choose the best air filter for your home today!