I'm trying to decide if I should get/need a fan for my Marantz 6014. The receiver has pretty good natural ventilation. It is on the bottom shelf of a unit with approximately 6 1/2-7 inches of clearance above, a reasonable amount of space behind and fairly open on both sides. It can get warm to the touch after use (I don't typically listen at extremely high volumes), but not really "hot" - certainly not so much that I can't leave my hand on it.
I have seen recommendations here for people to get fans for Denon/Marantz units, but is it really needed in my situation? I generally prefer not to add additional noise, more wires, etc.