hi im about to start growing very soon and am just adding finishing touches to my grow room its a 11 foot high closet 4foot wide and 4 foot deep i have installed 2 fish tank pumps one to bring fresh air in and the other to take air out. below are the links to a description of the pumps: http://www.marinedepot.com/md_viewItem.asp?idproduct=HG10806 are these ok to use for circulation ? they are design for fish tanks. Thanks for any help
for optimal ventilation you want to replace the air in your grow area 4-6 times a minute. I doubt those provide enough air. They would be much better for aerating water in bubble buckets.
I agree that the fish air-pumps are not enough cfm for the size of your room. If your room is 11 x 4 x 4 then your cfm is 176, so you need your exchange to match. A 250 cfm fan would probably do. Best luck. By the way.... Can anyone check out my link and see if you can help? http://forum.grasscity.com/showthread.php?t=81251&highlight=ventilation Thank you!!!