Canopy ventilation.
- Thread starter theappe3
- Start date
jtrzerocool
Active Member
i think it would be one blowing in and one blowing out.
jtrzerocool
Active Member
Originally Posted by reefraff
Two blowing in
Using fans to pull the air out exposes them to moisure which will corrode them. If you blow them in across the watter it will create a slight evaporative cooling as well.
how does that expose them to moisture?
they are above a tank full of water!
Two blowing in
Using fans to pull the air out exposes them to moisure which will corrode them. If you blow them in across the watter it will create a slight evaporative cooling as well.
how does that expose them to moisture?
they are above a tank full of water!
azaintcold
Member
I do 2 in, 2 out , and live in the phoenix valley and use metal halides. I have a 150 gallon reef and don't need a chiller because of this ventalation.
florida joe
Well-Known Member
Assuming your fans are at opposite ends of your canopy and your canopy has an open back you can run them both drawing the trapped hot air at the top out which will draw the cool room air in from the open back if your canopy is fully closed run one drawing cool room air in and one sucking the hot trapped air out
reefraff
Active Member
Hot air rises. If you have a vent in the top or near the top the hot air will naturally exit out the top of the canopy. If you add a couple of fans pushing air into the canopy from the bottom it enhances the convection effect and pushes the air out the top before it gets as hot.
How does moisture get to a fan blowing air out of the canopy? Where do you think that gallon or two of water lost a day to evaporation goes?
How does moisture get to a fan blowing air out of the canopy? Where do you think that gallon or two of water lost a day to evaporation goes?
florida joe
Well-Known Member
Originally Posted by Threed240
I have one blowing in, and at the opposite side one blowing out, and two blowing up/out the top. The back and top of my canopy are coverd in peg board, which is full of holes. Works great!
nice set up are you using the ice cap variable speed fan ? i would have the two at the top blowing out getting rid of the lighter hot air and the two at the bottom sucking in cool out side air
as an added safty step to prevent over heating you can alway cut out two holes in your peg board to vent out the hot rising air
I have one blowing in, and at the opposite side one blowing out, and two blowing up/out the top. The back and top of my canopy are coverd in peg board, which is full of holes. Works great!
nice set up are you using the ice cap variable speed fan ? i would have the two at the top blowing out getting rid of the lighter hot air and the two at the bottom sucking in cool out side air
florida joe
Well-Known Member
why not do this do you have a good in tank thermometer just play around with combations with your fan flow and keep the one which gives you the least heat rise with your lights on
threed240
Member
Originally Posted by florida joe
nice set up are you using the ice cap variable speed fan ? i would have the two at the top blowing out getting rid of the lighter hot air and the two at the bottom sucking in cool out side air
as an added safty step to prevent over heating you can alway cut out two holes in your peg board to vent out the hot rising air
The two fans above the lights (which cant be seen in the pics) blow up. With one blowing in across the water, and bottom of the lights, and one blowing out on the opposite side, there is no heat reaching the waters surface. The canopy with the two 175w halides, stays around 75-77 degrees. However, I do loose over a gallon of water everyday from evaporation, but my water stay's a nice 79 degrees. The fans are 4" computer fans (105cfm) 12v, on a 12v power supply.
nice set up are you using the ice cap variable speed fan ? i would have the two at the top blowing out getting rid of the lighter hot air and the two at the bottom sucking in cool out side air
The two fans above the lights (which cant be seen in the pics) blow up. With one blowing in across the water, and bottom of the lights, and one blowing out on the opposite side, there is no heat reaching the waters surface. The canopy with the two 175w halides, stays around 75-77 degrees. However, I do loose over a gallon of water everyday from evaporation, but my water stay's a nice 79 degrees. The fans are 4" computer fans (105cfm) 12v, on a 12v power supply.
florida joe
Well-Known Member
sounds good and the evaporation is in the norm
ifirefight
Active Member
Originally Posted by Threed240
The two fans above the lights (which cant be seen in the pics) blow up. With one blowing in across the water, and bottom of the lights, and one blowing out on the opposite side, there is no heat reaching the waters surface. The canopy with the two 175w halides, stays around 75-77 degrees. However, I do loose over a gallon of water everyday from evaporation, but my water stay's a nice 79 degrees. The fans are 4" computer fans (105cfm) 12v, on a 12v power supply.
I have a 130 with 2 - 175 MH and 320 VHOs. I have fans at both ends as you can see in the pic...1 blows in and 1 blows out...same results as Threed240....my temp stays at 79 and I lose a gallon a
day in evaporation.
The two fans above the lights (which cant be seen in the pics) blow up. With one blowing in across the water, and bottom of the lights, and one blowing out on the opposite side, there is no heat reaching the waters surface. The canopy with the two 175w halides, stays around 75-77 degrees. However, I do loose over a gallon of water everyday from evaporation, but my water stay's a nice 79 degrees. The fans are 4" computer fans (105cfm) 12v, on a 12v power supply.
I have a 130 with 2 - 175 MH and 320 VHOs. I have fans at both ends as you can see in the pic...1 blows in and 1 blows out...same results as Threed240....my temp stays at 79 and I lose a gallon a
