is this enough?

zebra said:

would a 160 cfm exhaust fan be enough to cool a 20inx30inx7ft(29 cubic ft) room with a 400w hps?

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dpjones said:

Some people recommend replacing the air 3 times an HOUR, some people recommend 3 times per MINUTE.

160cfm = 160 cubic feet per minute

Your space is 1.7 * 2.5 * 7 = ~30 cubic feet

160cfm fan would change the air 5 times a minute. You could go a lot lower and be fine. But that space is very small.

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