Lasts up to 3 months and will Improve Indoor Air Quality. Exclusive Premium Media Filter Technology removes airborne polutants down to the microparticle level. Highest quality electrostatically charged filter available. * Maximizes Indoor air quality with existing furnace equipment. 95% efficient at filtering large household air particles from the air passing through the filter from the best name in high performance media filtration. * Easy-flow energy efficiency and Honeywell"s Micro Defense Air Filters provide an additional layer of defense against harmful airborne microparticles that no other filter can match. Equivalent to the Best current MERV rating on any residential air filter. * Outperforms all other filters in its class * Heavy-duty frame and reinforced filter