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We only use the propane portion when we want a long shower or are boondocking, other wise it's electric. As I do not have an inside switch I leave it on all the time. Some have installed an on/off switch inside and some use the circuit breaker as a switch. I do not do either. I have not done the math as to which method (gas vs elec) is more cost effective as we usually have free elec where we go. I suppose if I was sitting somewhere for quite a while and paying for electric, I might have to crunch numbers to determine best method. It would seem to me, IMHO, that using both ALL the time is wasteful...But thank God we have choices....
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