Extractor??

Yo,

I need to replace my shitty extractor fan, I’ve got 3x3 tent so the one I’ve got currently is 6 inch, been thinking to go with 4 inch maybe but I can get 6 and run it on low speed which be better. Any recommendations? I need something dead quiet available in the UK

Get a 4" inch fan but get a 6" filter, and connect it with a 6"-to-4" baffle. A tip my buddy gave me, that i will forever employ from here on out. Better flow, filter might last longer.