Should a Mark IV have a fan?

[themisfit138]

My Mark IV doesn't have a fan, should it have one? If so where could I buy one, and where does it go?
Pictures would be helpful.

Thanks.

 

[stephen sawall]

Mine has one .... I do not have a head. I would contact Mesa for a fan.

 

[themisfit138]

Cool, thanks. I figured they were supposed to have a fan.