All of these methods of heating are suitable, and each has advantages and disadvantages, so none of them can be declared the winner. Choose your design based upon your own unique situation.
You can make a boiler yourself (paying due attention to grounding and electrical safety, or to fire and ventilation if using open flame heating) or you may choose to buy a boiler ready-made. Small electrical water heaters are a good option because they're compact, sturdily made, and are usually well heat insulated (which saves on your electricity bill). Using a water heater for a boiler is described in more detail later, in the section on Pot Stills.
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