Though I love the idea of a filtered ceiling fan that’s out of my way and can therefore be larger and quieter, I don’t think a jury-rigged solution would work at all. Fans tradeoff flow for static pressure (https://blog.orientalmotor.com/fan-basics-air-flow-static-pressure-impedance), and I’d bet ceiling fans are optimized for flow. The filters will up the impedance considerably compared to basically open air, and the flow would drop dramatically.
Also, some (most? all?) central air systems can run fan-only (no heat or AC), making additional filters unnecessary.
Box fans are also optimized for flow, but do well when used as filter cubes. Part of this is that these filters do not actually offer very much resistance to flow.
A central air system is generally not spec’d to move a large amount of air: they usually work by moving a smaller amount of more conditioned air.
I’m not so sure a central air system wouldn’t be up to the task. I calculate this purifier at 150 CFM from the product page and assuming 8 ft. ceilings, and this implies 1,500 CFM would be a fairly typical residential HVAC system, so that seems roughly adequate to me.
Also, that product page suggests you should cycle air 5 times per hour, but that seems excessive to me. I use that unit in a much larger room on a low setting and it does just fine getting rid of any smoke smell from wildfires.
microcovid.org thinks outside is 1⁄20 the risk of inside, and 5 ACH gets you to 1⁄4.
The purifier you link to has a CADR of 141 CFM, so roughly equivalent to bringing in outside air at a rate of 141 CFM.
If your residential system can do 1,500 CFM on a 2,000 sqft house with 8ft ceilings, I get 5.6 ACH. That’s quite a bit better than I expected; not sure how typical that is?
Though I love the idea of a filtered ceiling fan that’s out of my way and can therefore be larger and quieter, I don’t think a jury-rigged solution would work at all. Fans tradeoff flow for static pressure (https://blog.orientalmotor.com/fan-basics-air-flow-static-pressure-impedance), and I’d bet ceiling fans are optimized for flow. The filters will up the impedance considerably compared to basically open air, and the flow would drop dramatically.
Also, some (most? all?) central air systems can run fan-only (no heat or AC), making additional filters unnecessary.
Box fans are also optimized for flow, but do well when used as filter cubes. Part of this is that these filters do not actually offer very much resistance to flow.
A central air system is generally not spec’d to move a large amount of air: they usually work by moving a smaller amount of more conditioned air.
I’m not so sure a central air system wouldn’t be up to the task. I calculate this purifier at 150 CFM from the product page and assuming 8 ft. ceilings, and this implies 1,500 CFM would be a fairly typical residential HVAC system, so that seems roughly adequate to me.
Also, that product page suggests you should cycle air 5 times per hour, but that seems excessive to me. I use that unit in a much larger room on a low setting and it does just fine getting rid of any smoke smell from wildfires.
microcovid.org thinks outside is 1⁄20 the risk of inside, and 5 ACH gets you to 1⁄4.
The purifier you link to has a CADR of 141 CFM, so roughly equivalent to bringing in outside air at a rate of 141 CFM.
If your residential system can do 1,500 CFM on a 2,000 sqft house with 8ft ceilings, I get 5.6 ACH. That’s quite a bit better than I expected; not sure how typical that is?