Review on Pleated Furnace Filters 16X25X1 - Superior Filtration by FilterBuy by Randy Bin

Arrived quickly. This filter is MERV 13 and seems to work fine with my 1 year old unit. 4 pack, not individually sealed. Once the packaging is opened and one of them is removed, the others can easily become contaminated unless they are carefully sealed with some sort of airtight foil. The manufacturer should carefully seal all filters in the container packaging, even if this means adding fewer than 4 filters per package. This is a serious issue and may determine if I place orders in the future.