Extraction fan help

[Uv123_4]

I’m looking for some guidance buying a new extraction fan. I just have a 4” just now. And was getting hot with 400hps on so I was thinking how much bigger should I go 6” my tent is 90x90x180
I was looking at these ones. Is up to 517m3 too much for my size or will it be alright ?

[Valentina]

The volume of your tent is 0.9 x 0.9 x 1.8
=1.458 m3

As per https://www.thctalk.com/cannabis-for...ion-The-basics

"The fan should be able to replace the air volume (length x width x height = total volume in cubic feet) of the grow room in less than 5 minutes."

At 5 mins per "total air refresh rate", your tent needs a fan that can pull:

1.458 x 12
= 17.50 m3/hour

Numerically your fan with a 165 m3/hour rating should be nearly 10x what is necessary. But In Real Life...

If it was me I would be looking at the 6-inch fan and diall that down with a fan controller too.

[Uv123_4]

Cool was thinking the 6”
My 4” I have just now says 110m3
And on that link above it says have a 4-1 ratio for outtake to intake so I should be pretty good at that I would say. ?