Ferm chamber fridge - possible issue?

[shepditch]

Sorry for the cross-post. I originally put this in fermentation but it seems more appropriate here...

So I picked up this fridge from CL recently:
http://www.amazon.com/gp/product/B000MVOZF8/?tag=skimlinks_replacement-20

Only to learn that it's really a "cooler" and that the reviews are a mixture of complaints about cooling power. I though I was clever for getting a fridge with a built-in fan and no freezer compartment to worry about, now I'm concerned that it won't be enough to cool the fermenting chamber I have planned.

The plan is to use this to cool a 36Lx18Wx30H (interior space) box insulated with 2 1/2" of foil-covered Styrofoam and skinned with 1/4 ply. Enough room for 3 carboys or two carboys and two Kegs.

It will live in my garage which is insulated but subject to North Carolina summer heat. If I can stay 20 degrees below ambient I should be fine - no intent to lager in this thing.

Should I move forward or chalk this up as a $30 mistake, put the door back on it, fill it with bottles and get another source of cold? I've already altered my plans to allow for a switch should it be necessary, but I don't want to build this thing twice.

Thoughts and opinions always welcome.

Steve

 

[yourmama]

I have the setup you are going for, read the reviews on your cooler. I don't think it will be able to keep the ambient low enough in a hot garage in the summer, even with foam insulation.

 

[shepditch]

I think you're right. Appreciate the input. Debating the entire build vs. just getting a freezer at this point.