Filtrete NDP02 Healthy Living Ultra Deep Pleat AC Furnace Air Filter

These filters are designed for longevity and should be replaced annually. While standard 1-inch filters typically require changing every three months, the deep pleat design of this 4-inch model allows it to maintain performance for up to 12 months.

MPR (Microparticle Performance Rating) is 3M's proprietary system for measuring a filter's ability to capture particles, while MERV is an industry-standard rating. An MPR 1550 rating is equivalent to a MERV 12, meaning it is highly effective at trapping microscopic particles like bacteria and viruses, as well as common household allergens.

The deep pleat design is specifically engineered to provide a large surface area for air to pass through. This allows the filter to capture high levels of pollutants while maintaining optimal airflow, preventing unnecessary strain on your furnace or central air system.

Yes, this filter is an excellent choice for homes with pets or allergy sufferers. Its MERV 12 rating ensures it captures a wide range of irritants, including pet dander, pollen, dust, and even microscopic airborne bacteria.

Before purchasing, measure the slot in your furnace or air handler to confirm it accommodates a 4-inch thick filter. While the nominal size is 20x20x4 inches, it is always best to check your existing filter's dimensions or your HVAC system's manual to ensure a proper, airtight fit.