minus-squareTire@lemmy.mltoMildly Interesting@lemmy.world•The filters in my Corsi-Rosenthal Box look after 30 days of continuous use...linkfedilinkarrow-up10·11 hours agoIt’s literally what you see in the picture. Just household furnace filters taped into a box with a fan. You can pick your level of filtration with the type of filters you buy. linkfedilink
It’s literally what you see in the picture. Just household furnace filters taped into a box with a fan. You can pick your level of filtration with the type of filters you buy.