The Challenge Furnace Filters Face

Published on December 28 2009 by GuestPoster in DIY


Furnace filters are rigorously built to satisfy a single purpose.  Specifically, they’re intended to diminish the quantity of household dust that passes through the furnace and circulates through your house. The dust that is within the air in your home can be made of several totally different things such as pet dander, mildew and dried human plus dried pet skin.

At the essential level, the task that a furnace filter is meant to try and do is  straight forward.  Every brand of furnace filter that you’ll purchase is theoretically intended to do the same thing which is capture all the unwanted irritants that flow into in your home.   This happens to be more complicated then it sounds.  There are filters that trap solely large particles in the air in an attempt to still enable air to flow through them freely.   Other filters catch smaller pollutants but the drawback of this is often that the filter itself will get clogged up  quickly and if it is not cleaned on a regular basis this will result in the furnace having to work harder to get the air through the stopped up filter and the outcome will be further wear on your furnace and possible repairs in the future.

The trick is to seek out the correct balance between filter efficiency and air flow. Due to their low price, disposable furnace filters are quite popular.  However, disposable filters lack the level of potency of reusable furnace air filters.   The restricted surface space of disposable fiberglass filters is what restricts their level of effectiveness.  Trapping all the little particles would obstruct the filter and scale back air flow. To compensate, fiberglass filters trap only the largest particles and permit the smaller mold and bacteria particles to still circulate.

Then again, the pleated air filter design provides a lot of surface space. This permits these furnace filters to be more efficient and to block smaller particles.

Filter potency is rated in MERVs.  The higher the MERV rating, the more economical a furnace filter filter is considered.   MERV measurements are in microns and are related to the size of the particles that can get through the filter.  A sensible home furnace filter should have a MERV rating ranging from 5 to 12.  A rating of less than 4 would not provide sufficient filtering, and rating more than 13 would be suitable for hospital use.

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