Several major consumer publications and organizations offer consumers advice on the purchase of individual room air cleaners compared with whole-house systems. Basically, room air cleaners claim to clean one room and are portable devices which may or may not have the abilityWhole-house systems are devices installed within a forced-air heating and/or cooling system, inside the existing ductwork. range from a simple High Efficiency Particulate Air (HEPA) filter easily installed by the homeowner to contractor-installed germicidal and toxic gas light systems and humidification and/or dehumidification devices. The recent popularity of individual room cleaners has been brought to the attention of several consumer advocate groups. claims to be highly efficient at removing particulates from a room, and claims that customers are 100% satisfied with its quiet operation. testing organization analyzed these claims and determined that, yes, customers

were satisfied with the noise level because the unit had no fan or movingHowever, when tested for efficiency (particulates, smoke, pet dander), the unit did not perform according to advertised claims. twisted marketing campaign, this company has touted the weakest part of their product (the fact that it does not move air with a fan) as the most satisfactory aspect of their product. Good Housekeeping goes even further and in their words: "Bottom line... save your money. You can't rely on this product to clean the air in your home. Plus, any retail room air cleaner has limited efficiency and effectiveness as they are only designed to clean one room at a time." There are a variety of furnace filters available with a wide range of prices and reported efficiencies. Many of these filters are supplied by the furnace manufacturer upon installation or are available at retailCalled "MERV Ratings" (Minimum Efficiency Reporting Value), the higher the MERV number, the better the efficiency.

These filters are designed to protect the furnace and do a fair to poor job at that and are mostly made of fiberglass or a pleated blend of woven material. When choosing a filter, it is important to take into consideration its efficiency rating, as well as howhow to clean mold in a car's air conditioning system restrictive it is to air flow. air cleaner for home walmartGenerally the more expensive the filter is, theuv in air purifier more restrictive it is to air flow due to it being more dense for higherFilters that restrict air flow, more than the design of your heating and cooling system can handle, will affect the furnace's and air conditioner's performance and efficiency and may cause damage to the system.

Nature's Home products are designed to work in conjunction with your existing heating and air conditioning system. The high efficiency filters can be replaced easily by the homeowner. The whole-house systems are installed by professional heating and air conditioning contractors to convert your heating and cooling system into your whole-house air treatment center. The air in your home passes through this system several times an hour, unlike passive roomIn order to effectively remove particulates, pollen, dander and smoke from the air, multiple passes through HEPA filters is required. Stand-alone room air cleaners cannot possibly match the effectiveness and efficiency of whole-house systems. They simply do not move the large volume of air required to remove indoor air pollution. By using your existing forced-air system, you can have measurably cleaner indoor air.Electrostatic precipitators are commonly used to remove particles from airstreams having large steady flow rates.

include coal-burning plants and cement kilns. A typical two-stage electrostatic precipitator has a stage of corona wires and a stage of collecting plates. The corona wires are maintained at several thousand volts which produces a corona that releases electrons into the airstream. attach to dust particles and give them a net negative charge. plates are grounded and attract the charged dust particles. plates are periodically rapped by mechanical rappers to dislodge the collected dust, which then drop into hoppers below. between the plates needs to be sufficiently low to allow the dust to fall and not to be re-entrained into the airstream. 0.01 and 0.1 second for dust particles to acquire a charge in the coronaIndustrial systems are normally designed with more than 1 second residence time in the first stage to assure the charging of dust particles. Industrial systems are capable of removing particles in the size range 0.01 -- 10 microns and can achieve efficiencies in the neighborhood of

Small electrostatic precipitators designed for home or other non-industrial applications are known as electronic air cleaners. These do not have rappers, but must be taken apart and cleaned periodically. devices are often inserted into airstreams without regard to residence time or air velocities, and hence efficiencies can be much lower than those used in industrial applications. A well-designed electronic air cleaner for home or office building applications would not only be relatively large and have a high energy demand, but it would also generate ozone atEven a well-sized, efficiently operating air cleaner cannot achieve the efficiency necessary to guarantee complete interception of airborne bacteria, let alone viruses. However, as a means of simply improving air quality and decreasing dust and airborne microbes, electronic air cleaners do indeed have some value in home and office Source of the above information: Aerobiological

Engineering, Pennsylvania State University air filters are too dense for most furnaces. As a result, they can interfere with the airflow of the furnace, causing the air conditioner to freeze up in the summer. Electrostatic air filters can also cause the furnace to overheat in the winter. Electrostatic air filters require frequent cleaning, usually more than once a month. They cannot just be installed and forgotten about. Unfortunately, they are usually neglected because most people simply do not remember to get inside the furnace at least once a month to clean the filter and re-install it. you did, this routine is still a pain because electrostatic air filters usually have several layers you have to remove and clean individually. problem with electrostatic and all other air filters is that they can only remove the larger airborne particulates. What they fail to mention is that most airborne pollutants are smaller than the 0.3 microns that