HF SERIES

MERV 4 INITIAL EFFICIENCY

Application:

The HF Series two-stage foam & aluminum filter is an impingement type panel filter designed to replace disposable air filters commonly used in low airflow HVAC applications to remove airborne particulate and dust from the airstream. Placing a washable foam pad behind an aluminum mesh prefilter creates the unique two-stage filtration system offering greater arrestance and efficiency over the traditional, all metal washable filter. Popular applications include computers and electronic equipment requiring dust particle filtration to protect sensitive hardware. The HF filter is ideal for machinery ventilation and air cleaners that require a permanent dust filtration solution.

Construction:

The HF Series filter uses an aluminum frame to enclose the media pack. The first stage of the media pack uses an expanded aluminum grid, corrugated to increase its available surface area, followed by layers of corrugated aluminum screen wire assembled in a criss-cross fashion for strength and service to remove large airborne particulate. The second stage is made of 25 pores per inch (ppi) foam which removes smaller airborne particulate. The entire media pack is backed by an expanded aluminum support grid on the air-exit side of the filter. The frame is made with mitered corners and is secured with pop-rivet(s). The frame has drain holes in three corners.

Filter Cleaning and Coating:

1. To clean a dirty filter, rinse it with a moderate-to-heavy stream of warm water. High-powered steam cleaning or chemical dips are unnecessary and not recommended.
2. The HF Series filter is not supplied from the factory with filter adhesive coating. It is not advisable to coat this filter with any adhesive coating.