Join Date: Feb 2014
Location: NY; LETS GO METS
You keep a lot of tanks in that fish house right? Typically I'd say start simple and get a fan just to move some air around. But depending on the size of the space, the height of the ceiling, etc this might not be all too easy. I'd start with a normal oscillating fan (or multiple depending on the size of the room) pointed towards the ceiling just to see if that changes anything. If it does, perhaps installing a ceiling fan(s) might be worth looking into. A dehumidifier will certainly help; but again the size of the room, volume of water in there, etc might make a standard de-humidifier almost pointless. Might be worth looking into a heat recovery ventilator or an air to air heat exchanger. I think the cliff's notes is they essentially can pull all the air out of a room, dry it out, and return that same air/heat back into the space. Since you say the attic is already insulated I dont know if you need more insulation in the form of styro of if you might just need a good plastic vapor barrier. Of course the styro couldn't hurt; but I'd glue it up rather than screw it.
Curator of an ever growing fishroom that currently houses 30 different tanks. Most full of at least water....some even have fish!