[billy571]

My leaftop temps are running about 82-84 degrees. My 600w HPS is about 22" above my plants. How much cooler can I expect my temps to be if I go with a 4" air cooled hood and can fan? Can I expect to see a 7 or 8 degree drop just using an floor level intake, and exhausting to a bathroom ceiling exhaust fan? The temp in the room was 70-72 degrees before the light is on, so I"m thinking that the air on the floor is cool enough to pull through the hood. Any help would be appreciated.

My growspace is a spare master bathroom to give you an idea of the area I'm trying to cool.

[Justin_Credible]

I have never tried those hoods or that system, however...a friend of mine tried the aircooled hoods. He was really upset at the results because it did not cool things as much as he hoped...as well as he cut back his lumen output and his footprint of light. He switched back to the aluminum wings and air in on the floor and air out on the opposite end of the room.
4 inch can fan might not be enough. I always like to go larger and use a variable speed controller.

[intotheunknown]

i would definitely go with a 6" aircooled hood, with a 6" 400+ CFM fan w/ a speed controller. its ALWAYS a good idea to oversize things, instead of under size. and with speed control you have much better control over your temps at any given time.

[mrwags]

Day Star A/C any day of the week for cooling and the use of Co2.

They are hard to find they worked so well they don't make them anymore lol.

Have A Great Day
Mr.Wags