Ventilation Dilema.

venting the tank outside with an exhaust vent instead of a dryer vent would be good, exhaust vents have flaps in them so they only let air out and dont draw air in, otherwise your just heating your house in the summer when you really need to get rid of the heat, high end exhaust vents even have rubber seals to not let any air in at all. Thats how I vent large tanks and shark tanks, it works great, keeps house humidity down to, as I vent canopy and cabinent outside