Rack spacing & cooling

[Elvis]

Hope to be building my AV rack this weekend.

How much space do I need above (and below?):

AVR (Denon x3300w, Pioneer SC-65)
C4 4-zone matrix amp

Any recommendations on a very quiet rack fan?

Thanks

[Matt Lowe]

i try to do 2 u space above each amplifier. however room cooling may be more important for a rack that has space,

 

but if its a small compact rack there are 1u coolers that can be used to help move the air out or in.

[abovedeck]

Amazon has awesome 2u rack fans that have a screen and temp probe. They're like $100 each. I have one above each receiver and amp. You can also remove the fans and reverse them so the pull of heat is reversed. 

 

All my stuff is in a closed rack, but the rack is in a room that's kept at 60 so that helps a lot too. I find my denon AVR heats up much quicker than my C4 amp. 

 

https://www.amazon.com/gp/aw/d/B00ZQMP6RO/ref=sr_ph_1?ie=UTF8&qid=1484191761&sr=sr-1&pi=AC_SX236_SY340_QL65&keywords=rack+fan

[Elvis]

1 hour ago, abovedeck said:

Amazon has awesome 2u rack fans

That's the ticket, thank you.

[NextGenAV]

Remember that the room also has to have heat removed, no use blowing around hot air through components. Middle Atlantic did a great PDF about it ... I will see if I can find it for you.

Found it ... attached.

ThermalManagement.pdf

[Elvis]

24 minutes ago, NextGenAV said:

Remember that the room also has to have heat removed, no use blowing around hot air through components. Middle Atlantic did a great PDF about it ... I will see if I can find it for you.

Found it ... attached.

ThermalManagement.pdf

Educational, thank you. Very helpful. Confirmed my choice of using variable speed fans.  Venting it out the top/front should send the heat right into the return air duct.