If you are sucking air out of the BOX... air will come in through cracks and small holes... No need to PUSH air into the box...

There may be a reason to drill some holes in your box if it is air tight!!

With one exception... if you added another - 1000 watt light into that box you would be smart to push/pull air into the box as well as pull it out.

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Garden Knowm Reviewed by Garden Knowm on . Please help me fix my box I have a box 5 feet high with a 600 watt hps. Help me out please. Does this box look like a good design? Rating: 5