So say i was runing a 600hps with fans blowing at it, with a cold air intake from a window by a house fan with a few other fans , but no fan cooling the hood ....what do you think the temp would reach ... dont answers telling me to runn a duc cooling the hood with a cmf fan cause i do not have the money for that right now..ty for any suggestions.

not sure what the temps would be... hard to speculate. Here is what I did. I used a small fan mounted directly above my light to blow over the hood and down toward the plants, then had another small fan on the floor blowing hard up toward the ceiling. I found that this would all but eliminate the "hot spot" directly below the light and I could control the whole grow temp better because there was consistent temp to begin with. I would recommend getting a couple little reptile aquarium thermometers if you are short on cash and sticking them to the wall of your grow at different heights, then you can better avoid a layered air issue where you will have different temps at different points in your room. That's really all I have on this but I do know if you don't have to worry about noise being an issue than you can get a cheap inline fan from home depot (thirty bucks I think) and some cheap flex duct and make a hood vent fairly cheaply if that is an option for you. Hope that helped a little.

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yeh thanks for ur comment tring to help me out yeh i have a few fans i gues ill try what u just said then after that ill prob get a cheap inline fan ....30$ huh what are they called and where at in home depot

ohhh and anther question if im not cooling the hood air cooled with a inline fan how high should i put the 600 ???

http://www.lowes.com/lowes/lkn?actio...s&Ntt=duct+fan



http://www.homedepot.com/webapp/wcs/...atalogId=10053



as far as distance goes, put your forearm next to your babies so that the inside of your forearm is towards the light.. if it's too hot for the inside of your forearm, it's too hot for your babies.. easy peasy (some people say use the back of your hand, but my hands have a fairly high heat tolerance so it's not really a good 'gauge' for me)

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I just looked at homedepot.com and found a 4inch inline fan for 14.00, and a six inch for just under thirty bucks. They are in the heating and air conditioning section.

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what is the questiuon you are asking? How hot will the LIGHT get? How hot will the ROOM get?

Whats the temp in there now with no cool air? Whats the air temp that you will be bringing into your room from the outside?

Perhaps before telling us how you DONT want us to answer, maybe a more accurate question of what you DO WANT will be more benificial.

goodluck with your quest...and there is a TON of info in the FAQ section.

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ty all for helping.....well the room is currently 15-20 steady and ill be bringing cold air in from outside thats gunna be 0 to -30 in some cases ..does freezeing air like that make ur humidiy go up to like the 70s???

ohh and those inline fans you just showed me do i have to buy anything for them ..so i can plug right into a socket or how do i get power with it thanks again im noob.

those fans look like they only come with the wires, no plug. easy fix really if you buy a plug or cut a plug off a broken appliance or something but straight out of the box these fans need some wiring. there are many references on the internet for this wiring tho so dont be too scared.

not sure about the humidity issue, might want to check the interent for that info. but if it does raise the humidity, bring in a dehumidifier which will solve that issue as well as raise the room temp so its not near/below freezing.

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"Such holidays in the sun don't come without sacrifices"

white to white, black to black, green to green.. easy

whack of the end of an old computer power cord..

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If you plan to grow more than one crop...I'd pass on those Casa De Pot fans as they are WAAAAYYYY underpowered and are basically worthless for moving a good amount of airflow.

Spend the extra $$$$ and buy on of these

Valueline 6 Inch 435 CFM Centrifugal Inline Fan - Plantlighting Hydroponics

I've been at this hobby for over 20 years. When I started I tried to go CHEAP but in the end I spent 2x as much buying crapola and stuff that wasn't MEANT FOR GROWING...trying to workaround spending the big bucks/etc.

buy quality stuff the first time and you'll never have to look back

good luck

w w

That's so true WW.I did find a place for low cost fans.{Surplus center.com} I got a 200cfm and a 300cfm fan from them,the 200 was $9.95 and the 300 was $19.95 both acv.I have been using them for 3 years with no problems. It's like they say you go cheap you grow cheap.In the long run it pays to get the better fans and grow stuff.
Peace

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IMHO, i think this one would cost less over the long run since it uses less power

Vortex 6 inch 449 CFM High Power Inline Fan - Plantlighting Hydroponics

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thanks guys