Description

Application
The HF series two-stage foam and aluminum filter is an impingement type panel filter designed to replace disposable air filters commonly used in residential, commercial and industrial HVAC applications to remove airborne particulate and coolant mist from the airstream. Placing a washable foam pad behind an aluminum mesh pre-filter creates the unique two-stage filtration system offering greater arrestance and efficiency over the traditional, all-metal washable filter. Popular applications include computers and many indoor and outdoor electronic equipment requiring dust particle filtration to protect sensitive hardware and software. The HF Filter is ideal for vents of machines 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 is an expanded aluminum grid, corrugated to increase its available surface area, followed by one or two more layers of corrugated aluminum screen wire. These components are assembled in a cross-cross fashion for strength and service to remove large airborne particulates. The second stage is made of 25 pores per inch (ppi) filter foam which removes smaller airborne particulates. 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. If desired, it may be sprayed before installation with Filter Coat, a water soluble adhesive and detergent. Metal Air Filters does not sell Filter Coat nor any adhesive.