Quick Question. CFM for air exchange?

TheBotOnist said:

Hello.

I am just putting together a proper space so I will be ready when my 400w conversion will get here and I have been shopping around for my ventilation system. This brings me to a few quick questions...

Should I go with 4" intake/exhaust or 6"

Can I use the 80cfm fan to vent of will I have to spend the extra $15 for the 120CFM? Will 120CFM be enough???

Are th fans overtly noisy? No, I don't live with my folks, and my wife is my partner in crime. I just don't want the mail man thinking I got a turbo jet intake sticking out of the foundation.

I have attached a simple drawing of the area if it will help.

The intake will be on the floor and will bring air in from outside. The exhaust will be very near the ceiling and will vent into another room. The mother room has its own, separate ventilation that blows into and take air in from the room.

I don't think temps should be an issue as I will be drawing in air from the outside which is pretty cool right now.

Thanks so mush for any help.


EDIT***Sorry, Can't post the pic. can't get it small enough.***EDIT

Click to expand...