When selecting an air filter, take time to measure the exact dimensions and compare them with the exact dimensions listed on our site.
Most people don't think about furnace filters until it is absolutely necessary. Luckily, DiscountFilters.com is in the business of thinking about them all the time, offering popular filter brands at discount prices. Discount filters come in a variety of sizes and filtration levels in order to meet a variety of household needs.
Discount furnace filters improve air quality by removing contaminants, and in doing so improve the respiratory health of residents and people who suffer from asthma or airborne allergies. Regular maintenance ensures residents keep receiving clean air. One inch filters will need to be changed every one to three months. Discount filters that are between four and five inches deep can last nine months to a year. Regular inspection and replacement guarantees that they will work as designed and extend the working life of a furnace.
Filters should fit into place without gaps. Filters are sold in nominal sizes that do not typically match their actual size. Most filters have their nominal size printed on the frame. If not, the actual measurements should be rounded up to the nearest inch to determine which discount filter is required.
Discount filters are rated according to their Minimum Efficiency Reporting Value, or MERV. MERV ratings range from 1 through 16 and they are designed to indicate how a filter will operate. The higher the rating, the more airborne particulate matter the filter will capture. Some manufacturers use a proprietary rating system, but MERV ratings have been accepted as the quality standard by the international organizations that govern the furnace filtration industry.
While a discount filter with a higher MERV rating will clean air more effectively, lower ratings may be more appropriate in different situations. Typical household filters are rated between MERV 1 and MERV 4. They capture only 20% or less of the most common particulates found in the air of residential homes. MERV 8 is recommended for commercial use and discount filters with this rating are affordable upgrades from what most people currently have in their homes. A MERV rating higher than 8 will capture greater levels of particulates including smaller particles that filters below MERV 8 are not even tested. A MERV 12 discount filter captures greater than 90% of common household particulates and between 80 and 89.9% of particles as small as 1.0 microns.
There is no minimum order size requirement for any discount filter. Free shipping is routine and free returns are guaranteed within one year of the date of purchase if the product received does not meet expectations. All discount filters should be returned in the same condition as received and with the original packaging.
