Inline or exhaust fans?

[LS6 Tommy]

Originally Posted by causedabigpoop

Try looking into a boats bilge exhaust fan, they are small and are inline type you are looking for.

As previously mentioned, they're not rated for continuous duty, plus they're REALLY noisy & they usually operate on 12 VDC...

Tommy

[Wasserpest]

Thanks for all the replies, I think I am pretty much set on using a 120mm computer case fan. Actually, I am planning to do 3 of these "exhausts" - two for the canopy, and one for the airspace between water surface and canopy bottom (acrylic sheets).

I am going to connect the fans to a 120mm-80mm fan adapter (see link from earlier), connect that to a 80mm CPU cooler fan duct, and that one to a 3"-2" plumbing thing reducer, and from there stepping down with Sched 40 reducers to probably 3/4".

Need to figure out exactly how to connect the canopies to that exhaust. Maybe cut some pipe in an angle, so that there is a connection when the canopy is closed, and when I lift the front half of the canopy, the connection is interrupted, and the lights shut off too.

[killerproblem]

Originally Posted by sunfire99

Just wondering if venting high humidity air into the attic is such a good idea. If done constantly, I'd think you may cause a mold problem. Maybe not, but I read a thread long ago over on Reef Central about such a problem from venting into the attic rather than outside.

I live in sw florida the outside humidity stays between 65% and 99% all year the air from the tank was from inside the house that was being kept around 40% with a humidastat on the a/c system.... even the air out of the tank hood was proll lower humidity than the exterior air most of the year....

[Hoppy]

It is a very bad idea to vent large volumes of moist air, like from an oven fan, to the attic. That will give you continuously damp roof rafters and sheathing. I know this because the last house I had had the vent fan venting into the nearly totally closed attic, and I had severe rotting of the roof as a result. I ended up improving the attic venting as well as routing the fan exhaust out through the roof - after paying an arm and a leg to reroof the house.

[killerproblem]

aye but what i was getting at was the air was LESS damp than the air in the atic. the air outside was worse than the vent air from the tank.
there was no dampness in the atic from the tank vents, during the real wet times of the year you could go up there and find a very dry spot at the vent exit...
I know this wouldn't work in a less damp environment...

[Hoppy]

Originally Posted by killerproblem

aye but what i was getting at was the air was LESS damp than the air in the atic. the air outside was worse than the vent air from the tank.
there was no dampness in the atic from the tank vents, during the real wet times of the year you could go up there and find a very dry spot at the vent exit...
I know this wouldn't work in a less damp environment...

And, what Wasserpest is proposing isn't dumping a lot of moist air anyway, just relatively tiny amounts. Once he reduces the duct down to 3/4 inch in diameter, not much air will go through. Plus, computer fans don't move a lot of air.

[Wasserpest]

Alright, I think we have addressed the moist air in the attic problem.

I am planning this mostly to reduce the noise related to cooling a canopy. Small amounts of humid air shouldn't do damage in a well ventilated garage. I prefer have them go there than remain inside the house.

I think the humidity/mold problem is much worse if you have topless tanks. My tanks are all covered, and humidity inside hovers around 40%.

{WP out to buy some more plastic parts}