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[PeterL]

Years ago, in the cities in Saskatchewan, many of the parking lots had plugin for each slot, so folks could plug their car in during the day while they work.

I dunno if its still like that.

My father had a trick, he had installed a small electric room heater, under the dash of his car, and then plugged it in also, in addition to the block heater. He had a separate circuit out to the car to carry the load.

Then when he got up to go to work, the car would start easily and the windshield was melted and clear.