DIY AC box exhaust

[fatcalvin]

Hey guys. Going over a new setup in my shed that I am planing on running. The only issue I have is that Im not sure about the A/C hot exhaust. Im building a box for my window unit and having the unit inside my shed and exhausting the hot air out either through the floor or towards the roof. Here is a picture of what I have so far. Box and plenum will be sealed.

I was wondering if you guys think that the 6" can fan would be enough to vent the hot air out of the plenum? Its only going to be a 6000btu window unit with possibly up to an 8000btu. Ive seen people that do box AC and they just have 10-12" ports off the back with just ducting out to a different area with no fans so im just wondering if a small fan like this would work. Thanks!

 

[wwwillie]

It all boils down to numbers. What is the output in CFM of the A/C unit? Once you know that then you need to size the fan to match or exceed that number.

 

[fatcalvin]

Yea i realized that but im not sure how to find out the output of the rear fan from the unit. I guess i need to rip it apart and figure out if it will work.

 

[Dirt Weed]

A six to eight thousand BTU window unit should have around 200 CFM. There are 400 cfm per ton of refrigerant (12,000 buts)

hope this helps...

 

[fatcalvin]

Awesome thank you dirt weed! This is exactly what I was looking for!

 

[NugNubs]

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