Roy Air Purifier

Video:

Roy draws air from the sides and the bottom. The air drawn from the bottom is filtered by activated carbon, which removes odours and gases, the air drawn from the sides is filtered by Hepa Filter, which removes dust and allergens. Overall, the air in a room is filtered by both activated carbon and Hepa filter.

Roy works with 120mm fans: cut the fan frame with pliers

Then attach the fan to the cap with thick double-sided tape.

A good fan is UpHere, which is smaller then usual 120mm fans, that is why there is a custom "uphere" version of Roy. Use the non “Uphere” version for other 120mm PC fans.

If you choose a USB fan, add a "usb fan speed controller" (Google it) to adjust and increase USB fan speed:

Cut 3 Roy filters from 1 400x300x10mm “Frameless hepa filter” ( link1 , link2 )

Use 3-5mm granular activated carbon

Airflow measure video: