HEPA filters are limited to particles.
There are harmful gases and fumes that can simply pass through a HEPA filter.
HEPA filters can cause air to become too dry. Finally, some HEPA filters can produce ozone, which is an unhealthy gas that can irritate the lungs. HEPA filters are manufactured by randomly arranging polypropylene or fiberglass fibers (between 0.5 and 2.0 µm).According to the EPA, HEPA filters used in portable air purifiers and in heating, ventilation and cooling (HVAC) systems can help reduce symptoms of allergies and asthma. If mold continues to grow, consider using an air purifier with an antimicrobial prefilter to trap and destroy mold spores before they reach the HEPA filter. HEPA filters were first used in hospitals and nuclear power plants to protect people from harmful air particles and diseases. This means that it's easy to find an appliance that contains a HEPA filter and is labeled “absolute or true HEPA” HEPA.
To reduce the spread of mold, replace the HEPA filter at least as often as recommended by the manufacturer. VOCs are household items, such as hairspray and ammonia, that are too small for a HEPA filter to remove. HEPA filters are generally made from borosilicate glass fibers, plastic fibers (also known as polypropylene), or fiberglass bonded together with up to 5% acrylic binder. If you want to clean the air in your home, keep reading to find out if a HEPA filter is right for you.