a 150 shouldnt really get hot enough to have to vent outdoors(mine was less than 6in. at the end of flowering and still wasnt that hot with a fan pointed in the general direction). i know people have different ideas about which is best pushing or pulling your exhaust, ive read pulling is better but it depends on how much vent pipe and how many turns in it you have to have for your setup.
twoguysupnorth Reviewed by twoguysupnorth on . Vent fan Last grow I just did CFLs. Good enough. But I bought a 150W HPS for flower. I'm not sure if I'll hook it up though cause it'd take some doing. I have to jerry-rig the whole thing. I'll have to vent the heat through a hole I have to cut through the closet wall. But I'm wondering about the fan to push/pull the hot air through the ducting. Is it better to push the air (fan before ducting) or pull the air (fan after ducting). I ain't gonna cut a hole in the side of the house to duct outside. But Rating: 5