Wednesday, November 28, 2007

They can be very efficient

Unlike most furnace filters, which can be inserted into existing spaces to do their job, electronic air filters must be added to a system by a technician.

Efficiency can range from 95 to 99 percent and costs are very high, around $500 to $700 initially.
Although ozone is a good thing in the atmosphere, it's a toxic gas at our level.

Physical adsorption (furnace filter 16x24x1) - Reversible binding between gas molecules and a surface results from electrostatic interaction.
A chemical reaction forms a bond between the two. It is slower and more complex than physical adsorption. The efficiency of a gas-phase furnace filter decreases as more pollutants are captured, so frequent maintenance is required. There have been concerns expressed that overloaded fibers may re- emit pollutants in some cases. The cost differences between materials can be significant. furnace filters 12.5x16 x4 is known for its innovations in many areas, including furnace filters. Not only are their products easily affordable for most homeowners, but they have been found in independent testing to be among the best, even when compared to significantly more expensive systems. Their furnace filters range in price from a few to $20, and they can be bought at many locations.

An online quiz at the company's website advises consumers what filter would be best for them based on living conditions and personal health. 3M's Filtrete line goes beyond the usual MERV efficiency rating by focusing on a furnace filter 14x30 ability to capture particles between 0.3 and 1 micron.

The higher the MPR, the better. With Filtrete, you can also purchase a stand-alone unit to use the filters in.

A bevy of preschooler styles includes gas-phase, electrostatic and pleated, with a long list of choices for each.

AAF trane furnace air filter can be very basic models meant to protect the HVAC system or specialty filtering systems that can remove a lot of contaminants. ElectroKlean -These 1-inch, electrostatic, washable filters use airflow to create an electrostatic charge for attracting and capturing particles. An antimicrobial treatment stops the spread of trapped bacteria. They are rated MERV 7 and cost around $15. Pleats allow the filter to cover six times the space and capture mold spores, dust, pollen, pet dander, bacteria and particles that may carry viruses. Electrostatic charges caused by air flowing through the filter allow it to act like a magnet and attract particles. Cut-N-Fit Natural Fiber Pad - Firm sheets of resin-coated material with a net backing electrostatic furnace air filters the 1-inch Cut-N-Fit customizable furnace filters. Fibers making up the pad are half coconut and half hog's hair.

Gas-Phase - Replacement furnace filter 25 x 25 panels come with adsorbents like activated or impregnated carbon and potassium permanganate to remove a variety of volatile organic compounds, gases and odors. Dual purpose media are available for both odor and particulate collection. Some of these basic home-use furnace filters from American Air Filter can be purchased online, but others have to be obtained through dealers.

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