Through the wall AC questions

[fxstbi]

I'm adding a small storage area and work shop inside my metal building and I plan on using a through the wall 12,000 BTU air conditioner. The room will be about 275 square feet, 2x4 walls, 2x6 ceiling and insulated. I have a few questions regarding the AC units available. I can get 120V (10 amps) or 240V (6amps) units. The 240V model is about 200.00 more. My power source is about 50 feet away so I need to run MC cable and put in an outlet and install a dedicated breaker. Do you think there will be any advantage in the long run to go with the 240V model? From what I've read on line I should be able to use a lighter gage wire for the higher voltage. Any thoughts or suggestions?

 

[Falcon67]

Watts is watts, so it's only about total load sizes the power cable(s). You could use #12 for that load IMHO without regard to the voltage. The AC units I have stuck in the wall are all 120V, makes no difference in performance.

 

[fxstbi]

Falcon, thanks for the reply. I'll go with 120v just to make it easier and save the cash. The lower voltage unit had a better SEER rating too. Thank you, sir.