I purchased this cooling unit to cool my helmet on track days when weather is hot. Well, after fabricating the fan switch and configuring the inlet and outlet hoses, I connected the output hose to my helmet expecting to feel a nice cooling amount of air into my helmet, but...instead I felt absolutely NO air flow into my helmet. I thought I must have done something wrong. But that wasn't the case. I can only conclude that the fan included in this kit is thoroughly inadequate. Anyway, I'm posting this review to save others from the disappointing results that I have experienced. So, my recommendation is that you look for a different helmet cooling system.