20x20x2IN F7 MERV13 air filter for Furnace

The medium-efficiency filter material is divided into filter cotton plus melt-blown filter paper plus surface non-woven fabric; compounded by ultrasonic machines; material is polypropylene fiber; the detection standard is 5 mm particles. Efficiency from 45%-95%.

High efficiency filters most of are made by glass fiber filter paper,  with separators or without separators. This kind of filter needs to be filled with sealant all around; it is installed on the top of the clean room; it belongs to the place where the air exits at the end of the air conditioner; the requirement level is relatively high; generally it is H13 efficiency; the filtration accuracy is 99.995%
Its detection standard is based on 0.3-0.5 micron particles as the standard detection. All the high efficiency filter should be test before delivery to customer.