Using True HEPA Filters For Residential Applications
The use of portable HEPA filter systems in homes has been a common process for many people with airborne allergies. However, most of the portable HEPA units use a very minimally effective filter media which is more like a high end furnace filter than a true HEPA filter.
True HEPA filters are very dense and have a high resistance thus needing a fairly powerful blower/motor assembly to pull the air through them. 90% of all the portable HEPA filters or Air Purifiers on the market use small fans with very small blowers and usually cost between $35.00 to $90.00. In reality, a portable HEPA unit with a True HEPA filter should cost around $300.00 to $500.00. These units use more power but also move more air and are much more effective at removing small, sub-micron particles than the less expensive units.
It is also important to make sure the unit says it is using a True HEPA filter. HEPA filters cost between $90.00 and $150.00 each, so any air purifier under $200.00 is probably no using HEPA filter media. If your situation requires the removal of fine airborne allergens, then you really need to purchase the high end HEPA systems.
Pure Air Systems has been making HEPA based air filtration systems since 1985. You can get more information on their website at: http://www.pureairsystems.com or call them on their toll-free number at; 800-869-8025.