Pleated air filters offer a much higher surface area for particulate accumulation than flat filters. The more surface available, the greater will be the capture of contaminants. With a maximum filter duct size of 24 inches square, the maximum use of the space is necessary. The efficiency is dependent on the right media in the right design and thickness.

The use of a pleated air filter versus a flat air filter in the same space will reduce the impinging air velocity from 250 feet per minute to 21 feet per minute. The increase in efficiency is supported by a decrease in resistance. With this consideration, it is more cost effective and the results are better with a pleated filter.

Information about Pleated Air Filters

Some recommend installing a regular furnace filter as a first layer of filtering to increase the particulate capture. The regular furnace filter will capture the larger particles and leave more surface area available on the pleated filter for the finer particulates. For the ultimate clean, a filter with activated carbon or charcoal is often added as a third layer to adsorb gaseous odors onto the porous surface of the carbon.

There are a few basic things that can be done to facilitate the circulation of clean air. You should vacuum and dust frequently using a vacuum cleaner with some type of system to contain the dust particles. Allow fresh, outside air into the indoors frequently to remove the stale and to add fresh, oxygenated air. If you have pets that shed, use some type of skin conditioner to reduce shedding. Many products are available. Check with your vet for some suggestions. This can help people suffering with pet dander allergies. Change the air filter regularly.