250w hps grow tent temperatures help

nick8 · Sep 26, 2015

i got a 60x60x160 cm hps 250w grow tent with cooltube and carbon filter. I got a 125mm 185m3/h inline fan and a 125mm 365m3/h exhaust fan and a 2 oscalation fans. i got the tent into my bathroom and the temp into the room is 28 C(65% RH) and the temp into the tent is 30 C(with 70% RH) but the hps is about 50cm away from my plant. Am i doing something wrong?how do you see my setup?

BobCajun · Sep 26, 2015

For one thing you damn sure don't need the oscillating fans in there. You have plenty of air flow just from the exhaust fan. The osc fans are just adding heat from their motors and also blowing the heat from the lamp all over the chamber. You want the lamp heat to stay up top and get pulled directly out. With an exhaust fan you wouldn't need osc fans in a grow tent at all. Those are for when you have a big room full of plants. I can't really tell how the exhaust system is set up but you should have the room air coming in from the bottom and going out from the top.

What are you growing in there, one plant? A 250w lamp sure won't cover a 5'x5' space, maybe 2.5'x2.5'.

nick8 · Sep 26, 2015

i am going to add 2 more plants. my grow tent is 0,6x0,6x1,6 m . Why do i have temp issues?What about blowing air into lamp rather than sucking it.

hotrodharley · Sep 26, 2015

The bathroom is a dream setup for mold and heat issues.

BobCajun · Sep 26, 2015

nick8 said:
i am going to add 2 more plants. my grow tent is 0,6x0,6x1,6 m . Why do i have temp issues?What about blowing air into lamp rather than sucking it.

I guess it's because you put it in a bathroom. You said it's 28 degrees in there. The tent's only 2 degrees hotter, that's not much. Where does the fan exhaust, out the bathroom ceiling vent? Why is it 28 in there? Also where is the ballast. They put out a lot of heat.

250w hps grow tent temperatures help

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