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My thoughts are that you didn't think to tell us where you live or how
low the outside temperature gets.
That heater ought to work just great in San Paulo, but how about if it's
And, what's the nature of the insulation in your room versus the
"insulated room" they tested it in?
No one can give you a sensible answer without all the facts. As the
others have said, try four lit 100 watt lightbulbs in the room and see
if it's cozy in cold weather. That'll tell you what you want to know.
Or, just invite three friends over and see if the room stays warm while
all four of you are in it. The average human radiates about 100 watts of
heat just standing around, even more if there's an orgy in progress.
How many amps of current are already flowing through that wire in the wall?
I wouldn't want too many of those electric heaters and other appliance
loads on the same circuit,
fearing that old knob-and-tube wiring wouldn't take it if someone put a
under the blown fuse to "make it go again..."
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