This non-OEM replacement charcoal filter set is made in the USA and designed, as well as distributed solely by Air Filter Factory. This charcoal filter set is meant to be replaced every three to six months. This is not a Whirlpool OEM product and is not covered under any Whirlpool manufacturer's warranty. The Whirlpool brand name and logo are the registered trademarks of their respective owners. Any use of the Whirlpool brand name or model designation for this product is made solely for purposes of demonstrating compatibility.