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0 pointsBarrin925y ago0 comments

Those 3rd party studies seem like a pretty big joke

>"The test unit was installed in the center of the test chamber with a blade height of 93” from the floor. The test chamber measured 10' x 10' x 10' (3m x 3m x 3m) and a microbial suspension was aspirated into the chamber. Air samples were taken from the test chamber once the unit was turned on, and then at client specified intervals (0, 5, 10, 15, 20, 30, 45, 60, 90 and 120 minutes) over a period of 2 hours and then plated. "

https://www.bigassfans.com/docs/clean-air/104380072COL-010-i...

A small, sealed chamber were particulates were sprayed into the air once? Test that thing in a restaurant or a hair salon with a dozen people continuously interacting in it and then test the quality of the air

0 pointsBarrin925y ago0 comments

Those 3rd party studies seem like a pretty big joke

https://www.bigassfans.com/docs/clean-air/104380072COL-010-i...

0 comments

4 comments · 2 top-level

craftinator5y ago· 2 in thread

> Test that thing in a restaurant or a hair salon with a dozen people continuously interacting in it and then test the quality of the air

That's not how scientific studies work.

Barrin92OP5y ago

Of course not, scientific studies create artificial conditions so we can claim that overpriced fans are a magic cure for a virus. They should hire these people at Volkswagen, they'd make great emission testers and splendid scientists

craftinator5y ago

So, do you have a point, or are you just waving around BS hoping something will stick?

catherd5y ago

That test procedure sounds similar to the standard test for CADR (ANSI/AHAM AC-1-2015), which uses a 1008 square foot test chamber and measures the ability of an air purifier to deliver clean air.

CADR is the product of air flow and fractional removal efficiency, and it's the industry standard value if you want to compare performance of one air purifier to another. The CADR test usually makes separate measurements for dust, pollen, and smoke (particulates). It looks like they adapted the normal test procedure to measure the reduction in live/viable microbes.

However, in a few minutes of looking at their homepage I don't see anywhere they list a number in CFM of purified air, which is what CADR measures.

https://cfpub.epa.gov/si/si_public_file_download.cfm?p_downl... [Appendix A]

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