@born_like_dis @scruboakriver @noahjacobmama @AbraarKaran There are discounts. Right now you can get a 4-filter multipack of 3M MERV 13 on Amazon for $42.
@born\u like\u dis@scruboakriver@noahjacobmama@AbraarKaran有折扣。现在，你只需42美元就可以在亚马逊上买到3M MERV 13的4滤镜多包装。