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HVAC engineer here. I'd be interested to know if you've done any measurements with outside air coming through standard F5 filters. This is the typical setup for
by tjmc 3y ago
HVAC engineer here. I'd be interested to know if you've done any measurements with outside air coming through standard F5 filters. This is the typical setup for most ducted AC I come across. Much lower pressure and cheaper than HEPAs. It would be good to know what air quality results as a baseline and also in conjunction with in room purification if you have any data.
Edit: I'm in Australia. Here's a comparison of filter types for different locations: https://www.filtermakers.com.au/selection-guide/ https://www.filtermakers.com.au/selection-guide/
- ahaucnx 3y agoNo, we only tested with true HEPA filters. One important thing to point out with PPS systems is that you need to get the air from fully polluted to zero polluted in ONE pass as unlike air purifiers, there is no recirculation. So the filter quality is super important.
- tjmc 3y agoAgreed. Unfortunately we usually only see HEPAs in hospital theatres, CSSDs and the occasional lab. Air quality standards are still very lacking here. They haven't been updated since COVID or the east coast bushfires in any way.
- trog 3y agoNot sure how to read that guide, but would an F5 filter out smoke well?
- tjmc 3y agoNo they wouldn't. Typically outside air systems shut off in fire mode, but they often keep running if there's smoke due to air pollution. If you need to deal with this you need a HEPA. An alternative for critical facilities like datacentres, is they often just go into recirculation mode. This wouldn't work in locations with persistent air polution.