Why does Dirt Gather Around Your Jet Diffuser & Other Air Supply Vents?

March 22, 2016 9:03 am Published by

You have most likely seen streaks of dirt gathered around your jet diffuser or any other kind of air supply vents you may have equipped in your home. But why do these streaks of dirt come to be in the first place?

There are a couple of contributors to this occurrence, but the biggest reason for these streaks of dirt and dust is the pressure and velocity of the air being let out through small vents and into the space. Since the conditioned air is being squeezed and thrust through these vents, it comes out with more force which causes ripples of vibrations through the equipment, essentially causing disturbance to the jet diffuser. Due to this constant disturbance over prolonged periods of time, dirt and dust can literally fall into the airstream and then be deposited around the supply vents as the conditioned air is blown out into the room.

The aerosolized particles of dirt and dust that fly into your supply vent’s conditioned air usually come from one of two sources. The primary source is from the room or interior space itself. Whether its in a home or a factory or even a lab, this dust, dirt, and grime comes from people, pets, lit candles, curtains, among several other contributors. Having open doors and windows contributes exponentially to the amount of dust and dirt in a room as well. The other way dust enters the airstream is through unsealed penetrations in the walls or floors of a building, or the air ducts themselves. Galvanized iron ducts manufacturers recommend cleaning out your ducts in order to minimize dust concentration in conditioned air.

These dust patterns can be cleaned quite easily, but there are certain conditions where this occurrence is increased. Increased humidity and too little humidity can both exacerbate the amount of dust that is released across ceilings and walls. In a nutshell, certain room activities generate more dirt and dust into the room air which in turn creates these patterns of dirt and grime around ceiling diffusers. Since this is rarely a sign of dirty and/or contaminated supply air, the phenomenon can therefore be cleaned and maintained fairly easily.

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This post was written by KAD Air Conditioning

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