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Old 11-20-2010, 02:53 PM   #1
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In wall AC/Heater what to buy?


I live in an older home which has an in wall AC unit that needs to be replaced. I want to replace it with a unit that also provides heat. Before I purchace a new unit, I want to make sure I have the correct power available.

I have attached pictures of the existing unit, the plug and the breaker box.

Please let me know what would be acceptable.

What is the maximum size unit, and what is the minimum size that would work, power wise.

The space I am trying to heat/cool is ~350 sq ft.

Thanks for your help.
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In wall AC/Heater what to buy?-plug_.jpg   In wall AC/Heater what to buy?-unit_.jpg   In wall AC/Heater what to buy?-breaker_.jpg  

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Old 11-20-2010, 04:10 PM   #2
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In wall AC/Heater what to buy?


You have a 20 amp 230 volt receptacle with a 30 amp breaker feeding it. You really need to find out what size wire is feeding the circuit. Then you can look for a unit. I recommend the zoneline units to many customers. These are the one you see in many motels. They make a resistance heat unit with AC and a reverse cycle heat pump unit. The resistance unit heats a room quickly but draws more power when heating (if you don't use the room often and want a quick warm up) and the heat pump uses less power but may take about hours to stabilize room temperature when left off. Hope this helps!

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Old 11-20-2010, 04:18 PM   #3
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In wall AC/Heater what to buy?


Now do they have a model that's normally reverse-cycle but has aux resistance heat?
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Old 11-22-2010, 03:33 PM   #4
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In wall AC/Heater what to buy?


I dont know if anyone will be able to tell from the pictures but I took the box apart and took some photos of the wiring to try to get an idea of the size of wiring.

This is the unit I am thinking of getting.

http://www.ajmadison.com/cgi-bin/ajmadison/KC35HA.html
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In wall AC/Heater what to buy?-box-wiring-1.jpg   In wall AC/Heater what to buy?-box-wiring-2.jpg   In wall AC/Heater what to buy?-box-wiring-3.jpg  
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Old 11-22-2010, 03:34 PM   #5
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In wall AC/Heater what to buy?


FYI the screw that I used as a gauge is the screw from the plug.
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