Part of the reason why HEPA filters are so rarely used in air conditioning systems is that they are extremely restrictive in terms of airflow. This means that the system must be extremely powerful and use additional fans to be able to properly extract air through the HEPA filter and circulate it throughout the room or building. When it comes to buying an air purifier for your home or commercial building, it's important to consider all the factors before making a decision. Fortunately, airborne particles that trigger allergy symptoms are relatively large in size and are easily trapped by a HEPA filter.
By purchasing a HEPA air purifier that contains additional filters, such as a carbon filter and a pre-filter, the unit will remove a maximum amount of contaminants in the air. Users should not assume that an air purifier equipped with a HEPA filter will fully protect them against infection. Because allergens enter the home through open doors and windows (a single drafty window can let millions of particles into the air), HEPA filters don't guarantee the removal of all allergens. Installing HEPA filters in the home can immediately reduce the amount of airborne particles that are responsible for trigger these allergy-related symptoms.
In order to control COVID-19 and reduce airborne transmission rates, air purifiers equipped with HEPA filters can play a role when used in homes and public environments, such as waiting rooms. While they may be good filters, they have not been tested or certified to meet DOE standards for HEPA filters. The three most common appliances that use HEPA filters are whole-house filtration systems designed to treat complete air conditioning systems, portable air purifiers and vacuums. VOCs are household items, such as hairspray and ammonia, that are too small for you to remove a HEPA filter.
Yes, by using HEPA filters in both vacuums and air purifiers, the user can reduce the amount of allergens and airborne contaminants in the home. A whole-house HEPA air purifier connects to the main trunk of a home's HVAC intake duct and filters harmful contaminants every time the boiler or air conditioner is in operation. The key mechanism of this unit is to extract a certain amount of air from the main duct, transport it through the mounted HEPA filter and return the filtered air to the duct without impeding air flow. According to the EPA Home Air Filter Guide, the use of HEPA air filters in portable air purifiers and air conditioning systems can help reduce allergy symptoms and Asma. A HEPA filter labeled “true HEPA” or “absolute HEPA” has been tested and meets high efficiency criteria.
HEPA filters were designed in the 1940s to protect workers at nuclear facilities from inhaling radiated particles in the air. For this purpose, air purifiers were used with an activated carbon filter and a HEPA filter that absorbs VOCs (volatile organic compounds).).