> how have your heaters worked and how do you use them?

oops, I use a 15amp 7 day timer
http://www.elights.com/7dayprogheav.html set to turn
on at 7am and off at noon sat & sunday pluged into
a 20^o Thermo Cube (on at 20F off at 30F) pluged into
the http://www.reiffpreheat.com/product.htm#Turbo%20System

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Utopian Maturity: Eternity, Liberty, Equality now Fraternity & Altruism.