Air Conditioning - Venting a portable AC into an attic.

The attic I want to vent into is above my garage, it is pretty big (2 car garage) and has 2 passively vented hoods on the roof.

The AC I am looking at is a 9500 BTU Sharp unit (moisture removal: 2.5 pt/hr) that evaporates the water and sends it out the exhaust hose. I am not so much worried about the heat in the attic as the moisture.

Would this be an alright setup? Or should I perhaps look at a unit that collects the water in a manually emptied basin?

Hi fr and welcome. The attic will already be filled with warm moist summer air. Then you add even warmer and more humid air to it. Then the temp drops outside and you have condensation on the underside of your roof deck. Will it happen, I don't know, but I would not think an attic space, as you suspect, is a good place to send that moisture. No way to get that exhaust hose to the outside rather than the attic?

Bud

I've yet to see someone try exhausting an AC in an attic, but here's what can happen when you exhaust a bathroom fan into the attic: mold and sheathing damage.

http://paragoninspects.com/images/moisture/attic/bathroomexhaust1500.jpg

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Unfortunatly the window in this room is a casement window, so there is no easy way to vent out of it. I could use a piece of plexiglass, but there is no space beneath where I could place the AC without rearranging all the furniture. I also don't want to make a hole in the wall leading directly outside because of the cold winters here (Edmonton, Alberta), as there would be insulation problems to worry about.

After seeing the picture of what the bathroom fan did to the attic I don't think a unit the exhausts the moisture is a good idea. However, an AC that has a basin to collect the water has hot, dry exhaust and aside from further heating the attic shouldn't have any other negative consequences, right?

Have you considered a wall-mount split unit?

it will be fine heck how many days do you use ac in alberta three maybe

A split is too expensive, I only need the AC in one room. The end of may, as well as june, july and august are all hot enough to need AC, so I would use it much more then 3 days!