Tech sites which refer to indoor air quality (iaq), draw us into is an emotional argument. These reports tell us of dangerous pollutants that surround us. Which can cause us serious harm. This is why we need the ….”Z box”
The “Z box ” will measure 8 zillion components all to within the accuracy of a nats breath.
Which is real terms means ……absolutely nothing
No one ever brings up a WHO standard. Or even mentions calibration, testing or accuracy.
Recently i came up across a client who had purchased a HEPA ( High Efficiency Particulate Air Filter) combined with a charcoal filter in order to provide workers in the office space with confidence that the air was clean and filtered.
There are a number of issues with this. Whilst some HEPA filters are good many operate on the edge of being useful to achieve this level of particle size removal. Typically a HEPA system operates at 0.3micron , a corona virus size is of the order of 0.1micron (100nm). However when the virus associated with an aerosol the filter can provide some useful reduction of the aerosol with associated. Independent assessment of these systems in vital to their correct use
We would not buy children’s medicine from the chap in the market, who has no credentials, however its perfectly reasonable to make random internet purchases on goods which are supposed to be good for our health.
note references made are always about “style”, “size” “looks” and “features” but not a jot about how it is tested and whether it really works!