Furnace filters do more than the apparent job of filtering dirt and unwanted particles from entering your furnace. They are built to reduce the amount of household dust that passes through the furnace and circulates through your house. The dust that is in the air in your home can be made of many totally different things like pet dander, mildew and dried skin both from humans and pets.
In theory, furnace filters are very straightforward devices. Every sort of furnace filter that you may purchase is theoretically meant to do the same thing which is capture all the unwanted particles that circulate in your house . The manner in which this works however is somewhat more in depth then that straightforward explanation. Basic filters are meant to trap large particles in order to allow the air flow through the filter not to be blocked up and preserve sufficient air flow through the filter. Filters that trap the tiniest pollutants will become quickly clogged and place a serious strain on the furnace’s blower motor that may result in pointless wear and tear on your furnace ensuing pricey repairs.
It is important to attain the correct amount of filtration so that your air is clean and at the same time not impair your furnace’s ability to push air through the filter. Disposable fiberglass filters are common and cheap. The downside is that they’re not very efficient. One of the problems of fiberglass disposable filters is that their surface if very limited. The explanation for this is that if the filter was ready to catch every small particle in the air then the filter would quickly become stopped up and proper air flow would be affected. Disposable filters achieve that task of protecting your furnace from large dirt particles however they’re not able to satisfactorily filter little irritants from your home air.
Conversely, if you use a pleated furnace filter, it’s able to attract small particles from the air since its surface space is abundantly larger. The larger surface space makes it easier for the pleated variety of furnace filters to trap smaller air borne pollutants .
MERV is the rating methodology for indicating to shoppers how efficient a furnace filter is. Increased MERV ratings indicate increased levels of filtration ability in any given filter. The measurement that the MERV system uses to judge efficiency is based on the size of the pollutants in microns that the filter is able to trap. The MERV rating on any furnace filters you are considering should be a minimum of 5 with 12 being the maximum rating you need. If the furnace filter you are considering contains a MERV rating that’s less than 4 then you ought to take into account try a different kind since this can not sufficiently filter pollutants from the air. At the same time, you do not require a rating higher than 13 since this is a level solely necessary in hospitals.