Is it necessary? Buy.com has this one for $7.99 today. Nyko Wii Intercooler - High-Efficiency Snap-On Cooling Fan I confess that I have never felt my Wii while using it and it does sit in a tight spot in my entertainment center. (OK no jokes about those statements! ) So, I don't know how hot it might be getting. I've had the Wii since XMas and had no issues so far. $7.99 seems like a cheap insurance policy if it actually helped the unit.