Great idea. What's worked for me is simply taking a 20"x20"x1" filter and sliding it into the back cover of a standard $25 Lasko box fan. Cheap, easy option for air filtration in the home.
That’s a great idea. What kind of filter do you use?
Ceiling Air Purifier
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Re: Ceiling Air Purifier
#22Great idea. What's worked for me is simply taking a 20"x20"x1" filter and sliding it into the back cover of a standard $25 Lasko box fan. Cheap, easy option for air filtration in the home.
That’s a great idea. What kind of filter do you use?
Some really good discussion of this has happened on HN last time California was on fire.
Re: Ceiling Air Purifier
#23That looks extremely cheap and ugly, I would be embarrassed to have company over. I'll stick to my True HEPA Coways, which you can get for roughly the same price as this DIY contraption.
Re: Ceiling Air Purifier
#24That looks extremely cheap and ugly, I would be embarrassed to have company over. I'll stick to my True HEPA Coways, which you can get for roughly the same price as this DIY contraption.
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Re: Ceiling Air Purifier
#25How do you measure PM 2.5 at home? Whats the best and cost efficient way to do it?
I use a Nova SDS011 sensor connected a raspberry pi, then feed the data into HomeAssistant with a python script and MQTT.
Re: Ceiling Air Purifier
#26How do you measure PM 2.5 at home? Whats the best and cost efficient way to do it?
We run one of these (https://www.adafruit.com/product/4632) off of an Arduino Uno with a small LCD hat (w/ micro SD for logging as well). I think that's the same sensor as in the outdoor units that Purple Air sells. ~$150 for the whole setup, but could definitely run that off a smaller / cheaper board, display only. Going strong for 2+ years at this point.
Re: Ceiling Air Purifier
#27Great idea. What's worked for me is simply taking a 20"x20"x1" filter and sliding it into the back cover of a standard $25 Lasko box fan. Cheap, easy option for air filtration in the home.
Can confirm, I have made like a dozen of these at this point. Works great but is loud. Good white noise at night though.
Re: Ceiling Air Purifier
#28I wonder if there is going to be an issue with the structural integrity of the filters, since they are designed to rest on an object rather than hang? Wouldn't think it would be a big issue, but possibly? If you were wanting to do this long term, feels like a series of light wood frames to support would not be too expensive/difficult to construct or possibly 3d print, and have advantage of reduced adhesive smell.
Re: Ceiling Air Purifier
#29An ac filter is pretty gray after just a few months. Granted this will take longer to get dirty but I suspect it will look ugly before you know it.
Re: Ceiling Air Purifier
#30How do you measure PM 2.5 at home? Whats the best and cost efficient way to do it?
https://www.airgradient.com/diy/
Founder is very supportive, good product, easy to build
The sensor will display PM2.5, CO2, Temperature and Humidity on the display and can optionally send the data to any server for data logging (e.g. the AirGradient platform or any other cloud backend).
Parts: Wemos D1 Mini USD 2.24 Wemos OLED display USD 2.47 Plantower PMS5003 PM Sensor USD 13.89 Senseair S8 CO2 Sensor USD 28.00 SHT30 or SHT31 Temperature and Humidity Sensor Module USD 2.55