Air purifiers were developed within the 1940s. HEPA filters got highly sought after due to their use within medical settings, and trap around 99.97% of particulate matter bigger than 0.3 microns. And because a persons eye are only able to see things bigger 10 microns, this means HEPA filters catch that which you can’t see. They’ll remove bacteria, chemicals, and viruses to make a more sanitary living environment. Better yet, it lets you do all of that without relying upon harsh chemicals or dangerous byproducts!

You would ever guess a HEPA filter as a possible accordion. Extremely thin bits of fibrous material are folded to make flaps. These flaps trap particles as air is pushed through with a fan. The particles remain held in the filter, however, meaning it decreases in effectiveness after some time. You should expect to exchange the filter every two or three years.

Some brands provide ultrafine particle filter combined with HEPA filter to particles even finer than 0.3 microns Divide a hair strand into 240 pieces as well as the width of 1 such piece matches 0.3 microns. Note that HEPA filters don't remove odour.To target odour, you should opt for an activated carbon filter over the regular HEPA filter combination. There are several forms of activated carbon filters. Some of them are light mesh-like which prevents cooking odours. On the other hand, some filters offer activated carbon pellets which may remove gaseous and chemical odours.

The HEPA filter is finely tuned so that you can remove the invisible particles. Placing filters (pre-filters) which could trap larger particles while watching HEPA allows this filter to stay longer and only load with micron-size particles.These sorts of filters normally can be replaced easily and inexpensively. Finding them indexed in the technical specifications is a great indication your filter will not need to be replaced as frequently as a unit that will not contain them.