Drawing outside air through Cooltube

[Inspired333]

Hey guys.

I want to cool my light with a cooltube by exhausting the hot air outside. Instead of drawing air from the entire room I want to draw the air directly from outside via ducting, in a "closed loop", and through the cooltube, then directly back outside via ducting.

My question/concern is; Do I need to worry about moisture passing over the bulb?

I have made an insert (like a window) with two 8" holes which I will mount two 8" flanges onto on the inside of the room. The holes are about 2" apart - one above the other; I want to pull outdoor air in the bottom hole down through ducting, up over the bulb/through the cooltube, then up and out through the top hole. Like a closed loop to cool the bulb without exhausting room or house air.

There is a small 'window sill type ledge'/'recess' on the outside of the window (outside).
I'm worried that maybe if it's rainy/misty that water might "hit/splash/cause mist" whatever, and be drawn into my bottom/intake hole than be pulled though the ducting and pass over the light bulb on it's way through and out... possibly causing the bulb to get..wet? ..and bad things happening to it?

Think I should be worried about this?


Edit:
I see a possible humidity(?) problem with drawing in really cold air to cool a hot 600 or 1000 watt bulb, or with it being just to cold and damaging the bulb when it's off/comes on because it's so cold(?) like in the late fall/winter.
But I'm talking about doing this in the early spring/summer, still, the lows/night temps could as cold as *-10*C (45*-50*F) at first. Then the lows might get warmer later like 15*C / 60*F and up and that's no worry of too cold for the bulb or condensation, right?

What is too cold to draw air over a bulb (on or/and off); freezing point? 40*F? 55*F? Hmm :/

 

[supermanlives]

I never would worry about cold air. . I would never draw from and area that could let in rain . recipe for disaster. bulbs aint cheap

 

[Weird]

the outside air will cause condensation where the vent enters the house if its cold outside and humid in teh room

never had it cause an issue with the bulb but condensation in the grow can lead to other issues

 

[Inspired333]

Hey thanks guys.
I could draw air from the next room, BUT that next room is not an "enclosed room"; therefore it kinda makes for a poor "lung" room, it's connected to rest of the house by a staircase with no doors :/

Using outside, ducted air to cool a bulb in a cooltube and exhaust it outside..; can someone say for sure if that is something people do or don't do?

Something else I wonder is how people duct there grow room heat outside in the winter when the intake to the room in inside the house... I did that in the winter and the house (and the room too) were e.f.f.i.n.g. freezing... it just draws all the heat from your house out!
And what about lights out; my room got as cold as low 50's and lower with lights off and just drawing air from the house into the room and back out into the house - plus the house got cold.. the room is on the outside of the house and it isn't (properly) insulated, only what I've managed to do.

 

[Weird]

ive done exactly what your mentioning and I had condensation on the outside of the intake which was about 6' before the fist lights

lights never had an issue

 

[Inspired333]

You've done it? Cool man. Ever notice "mist" air moist air traveling through your ducting/cooltubes, lol?

Anyway I might give it a shot. I just left a thread (by ghettogro) where he is using this beast of a fogger in his room and there is so much mist hanging around the BARE bulbs that it looks crazy.. it's like a grow in a sauna. I don't know how the bulbs aren't exploding.

 

[Weird]

no never just condensation where the pipe first enters the house and only in the winter

 

[KAT]

I leave a drip loop before the duct enters the light ,condinsation will drip down never making it to the light.happy trails.......

 

[St3ve]

I also think it will work fine. I've done the same thing and never had an issue.

The first question I thought of though is what is this going to do to the fresh air turning over in your room for the girls?