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Turning a bathroom into a refrigerator with a window A/C unit

2/28/21       
heath Member

Long story short, I've got some projects coming up where I need to maintain a consistent temp around 45 F for a few days. Only way I know how to do that is in a fridge, or possibly by turning my extra 1/2 bath (small) into a cooler using a window a/c unit.

I think most window a/cs now a days have thermostat control and some of them are digital. I'm thinking I'll need one with some kind of non-digital dial type control. Rewire the thermostat to remain a closed circuit so that the a/c cools whenever it gets power. Then put a separate thermostat in-line with the power cord and control the temp that way.

Questions are... Anyone see a problem with this setup? I wonder if it would harm an a/c to have ~45 F / 7 C intake air?

3/2/21       #2: Turning a bathroom into a refrigera ...
Mark B Member

Or just cobble together some simple ductwork (foil faced foam sheet and tape) from the feed of the window rattler and locate the unit slightly outside the space being cooled. Wire a plug tripped by a remote bulb thermostat reading from inside the space. Leave the window rattler on max cool and its internal thermostat will never see the cold room temp so it will run continuous. The unit will be kicked on and off by the thermostat. At least that way when your done you dont have a buggered up window rattler.

Just my $0.0134

3/2/21       #3: Turning a bathroom into a refrigera ...
rich c

Google says a window AC unit will drop the temperature about 15-20 degrees from outside air temp.

3/2/21       #4: Turning a bathroom into a refrigera ...
rich c

Not a thermodynamic expert, but I think you can only get the temperature drop that the compressor and heat exchanger can make. That's not based on running time.

3/2/21       #5: Turning a bathroom into a refrigera ...
rich c

If you are doing something like a river table casting, I'd set the mold on plastic sheeting on an ice bed.

3/3/21       #6: Turning a bathroom into a refrigera ...
Rob Young  Member

Website: https://www.nutekmachinery.com

If a window air conditioner runs constant the condenser coils will end up freezing and turning into a block of ice. Plugged condenser coils means no air flow. No air flow means no cooling. Doubtful this will work for you.


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