RE: Other tech seems to be way ahead of NNN21 Jan 2022 17:08
Problems with current air conditioning filters
Traditional air-conditioner filters that use fiberglass or aluminium meshes are only capable of filtering out large particles such as lint and dust. Even the best high-efficiency particulate air (HEPA) filter can’t trap all of the viruses, nor can it kill them – a significant percentage of the viruses will pass through these HEPA filters and circulate back into the rooms. To make matters worse, because aircon is typically turned on and off every few minutes, some of the trapped viruses on the HEPA filter will be blown through the HEPA filter into the rooms with the next wave of air. Due to the long-surviving time of SARS-CoV-2 in air, these particles linger for anywhere up to several hours.
Castle