18x24x1 replacement furnace filters, air handling or air conditioning filters for residential or commercial applications. The 18x24x1 Filter is only available by Koch Filter as a standard filter size in the MERV 8 rating.
14x25x1 Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 8 Filters)
SOLD AS A CASE OF 12 FILTERS