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Originally Posted by dstankov
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The way I understand it the Cheap Heat system uses the existing furnace fan (required to be operational for installation) and includes a switch for selecting electric or propane heat. One thing I just noticed on their FAQ is that if wired for 50 AMP service the system will not run if you are adapted and connected to campground 30 amp.
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From the write up it appears to me that if wired for the low power setting like on a 30-Amp RV that it will work on a 50-Amp service with 30-Amp adaptor. I think that's because the heating element would then be working on 120-Volt from one of the two hot legs of your 50-Amp service. But you would be limited to 1800 watts of heat.
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