This statement doesn't match your later claim of being a "dedicated boondocker"......and is causing some confusion in the answers.
Perhaps you take "dedicated" too narrowly. Sitting in a fairground RV park while we prepare the rig for long term storage and pack up ourselves doesn't change the boondocking preference - enhances it if anything. If we are on mains power it doesn't matter what unit we buy, so in the context of the title, we need to focus on the "boondocking" part. My OKA back home has electric blankets and it doesn't have a mains hookup or generator at all so no problem to boondock and use elctric blankets. It does however have a couple of PSW inverters. Probably use less power than a furnace blower anyway.
When I don't have shore power, my heat comes from the builtin "furnace"; propane and a little 12 V for the fan.
yes, me too at times but the furnace is way too noisy and the fan draws a lot of power, so our preference is for a catalytic heater and peace and quiet (and three CO monitors so the "peace" doesn't become permanent). Betty's preference is to have a nice warm bed to get into and no noisy furnace.
I would hope that ALL modern bed warming appliances use a low voltage to do the actual heating.
don't see anything in the Sunbeam information to indicate that it doesn't run on mains power. Ones in Australia run on 230V. They do use electronics to regulate the power, but with no obvious transformer, they have to be regarded as mains connected.
I would also suspect that all "economy" models use pretty basic electronics and don't really care if the input voltage is pure or not.
Clearly not the case with all electronic appliances. Coffee machines, bread makers and ... are all intolerant of some non-sinusoidal waveforms. The original electric blankets had two separate elements and the three heat switch (I guess) hooked them up to give three levels of power in much the same way as basic box fan-heaters, so yes, they couldn't care less because there was no electroics at all. Modern ones have sophisticated timing and temperature control processors and in too many cases, not enough attention is given to making them immune from daggy power supplies.
