Help Me With Air Flow In My Canopy

I wanna keep my back side untouched except for power supplies coming in for everything

But I am keeping my options open at this time... until tommorow night when I get my canopy delivered....

I may have an exhaust on the back side since I don have an extra 120mm IceCap fan from my fixture

Not a bad Idea... one on each side blowing in and a fan over eac reflector exhuasting out.... but its like option b but spread out with the exhaust fans

I like your thinking... but the air must escape with the positive prssure on the inside...

I dont see any danger... with this....

I do have an extra Ice cap fan that I can center in the middle of the vent holes to aid in the venting process of the 4 fans blowing in

Thanks for the input everyone... K+++

 

It all depends what you want to cool, and what you have available. I know with Sparky's fixture I think it matters what they were going for.

To keep the internals cool, there would be no way to suck out enough air. The air inside would be heated, heating the components, and then sucked out. does not keep the components cool. Blowing cool air in does. But the fixture is also sealed mostly and with vents on the sides the air goes where they want.

I don't think it is the same thing with the canopy. The canopy will be heated. that heat in turn will heat the water heating the tank. What we want to keep cool here is the tank.

The canopy is not designed to flow any sort of way. The pressure outlet for two fans on each side blowing in is out the bottom of the canopy. So you drill some holes. Is all the air going to go out them? Are you going to be blowing heated air on the water surface? Don't know.

So you put two fans on the side, two fans up top. Now you are doing both and it is balanced. But changing directions causes drag. Are you moving enough out? IDK. Could be the right thing to do.

Now you put 4 fans on top blowing out. You are exhausting hot air and directing it away from the tank.It all depends how sealed the bottom of the canopy is.... if it is open sort of, then it will act like a vent-a-hood. Draw cool air in the sides and exhaust hot air up. If you cut vents in the sides, then it would draw cold air in from the vents.

If it is sealed well and not much air will get in around the sides, then I think two blowing in and two blowing out will be better.

But there is a wrinkle.... hot air is less dense and all fans being equal two fans on top moving hot air will not exhaust the same amount of air the two fans blowing in will. To have it exhaust, I would think you would need two blowing in and three blowing out on top.

Food for thought.