Comments on: Using an Air Monitor to Determine When to Replace a HEPA Filter https://smartairfilters.com/en/blog/using-air-monitor-to-determine-when-to-replace-hepa-filter/ Clean air is not a luxury - affordable air purifiers Tue, 30 Apr 2024 08:16:53 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Jack https://smartairfilters.com/en/blog/using-air-monitor-to-determine-when-to-replace-hepa-filter/#comment-29246 Wed, 06 Apr 2022 13:23:48 +0000 https://smartairfilters.com/?p=17311#comment-29246 I believe Smart Air may have used an anemometer to measure air flow when testing air purifiers.

Could a measure of reduced output, over time from ‘new’ (ideally under similar internal and external pollution levels), be used to guage when the HEPA filter might be replaced?

I’ve an anemometer on order to compare the relative efficiencies of my AC and DC fans – wattages drawn for various levels of output. Anticipating DC being particularly efficient for low[er] output.
Power Factor also being taken into account, to minimise stress on the electricity grid.

I might also compare my existing Ikea HEPA filter against a new replacement – the old having been in operation continually for several months, though largely at my particularly efficient Medium (CADR
90 specified, using less than 6 watts) setting.

With usually low pollution levels in Australia, aside from extreme bushfire pollution, a powerful air purifier generally operating more efficiently at lower levels might be appropriate.

]]>