maurod - I bought an Azoo 2 - fan unit a while ago and never used it - it is still new in the box. I will sell it for $25. Pick up in Stoughton - lmk if interested.
BTW, here's a brief description of the product by the manufacturer:
Large cooling fans provide powerful ventilation to reduce heat transference from aquarium equipment. Extremely quiet operation with adjustable positioning, perfect for sumps or for use in aquarium stands/cabinets to reduce humidity. Generates 10 times more cooling power than conventional fans to reduce temperature buildup by 5 to 7 degrees Fahrenheit. Easy to install - simply attach using screw-mounting brackets. High-quality plastic construction. 12V UL-Listed.