Dry Media

 

Dry Media filters

consist usually of a permanent frame and a dry replaceable medium of cellulose, asbestos or glass fibers, specially treated paper, cotton batting , wool felt or synthetic material.

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The air passages thru the medium are smaller than those of the viscous impingement type filter, and therefore lower air velocities are necessary to avoid excessive resistance . In order to obtain a large surface area relative to cross – sectional area, the medium is usually pleated in accordion form.

Medium efficiency dry filter 

with an area ratio of 7 : 1 Such a filter is capable of a wide efficiency range varying from 84 % to 95 % based on the AFI weight test, depending on the medium used.

High efficiency filters with area ratios of from 25:1 to 50:1.

This type of filter may be obtained with and efficiency as high as 99.97 % , D.O.P. test method. D.O.P. efficiencies above 90 % are usual.

If you are interested in getting a new HVAC San Diego , CA home, there are a lot of new ways to do that. Give Atlas Heating & Air Conditioning Inc a call today at (877) 452-8527, so that we can get the process started for you.

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