[Dragonflylady]

I have looked at several company's sites to determine the temperature range that chest freezers operate. I would like to get a chest freezer, put it in my laundry room and store kegs with the CO2-- obviously, I do not want the T to be 20%.....

Any one using a chest freezer for this role?

[JT]

Yes, you need to purchase or make a temperature controller to prevent making  beer slushies. 

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[narcout]

Any one of the below would work fine.  Having used both the Johnson and the Auber, I much prefer the Auber (even though you won't need dual stage control for this application).

http://www.northernbrewer.com/thermostar-dual-mode-digital-temperature-controller

http://www.northernbrewer.com/johnson-controls-a419-digital-temp-controller

http://www.auberins.com/index.php?main_page=product_info&cPath=8&products_id=334

[denny]

I'm also as big fan of Auber.  I've tried the other brands but found the Auber offers more features for a lower price.

[Biran]

I purchased two of these and am very pleased with them:

http://www.amazon.com/Inkbird-Itc-308-Temperature-Controller-Thermostat/dp/B011296704

My friend has a calibrated thermometer at work so I took them in to his lab and found that they were both off by a few degrees, but after calibration they have worked flawlessly so far.  I have one for my kegerator and one for my fermentation chamber; both are fridges.