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Old 02-08-2017, 03:33 PM   #20
psneeld
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City: AICW
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 20,151
Good luck, I had 300W magnetic ones on my Cat 3208s that didn't do anything.

I never saw any warming anywhere but within inches of the pad.

The factory mounted immersion heater is 1000W or more on my Ford diesel truck and it did the trick.

I guess 250W of power, properly adhered in the right spot will work, but if I were doing it, I would look to insulate the outer parts to make sure all the heat was going to work for me.

I would vote on the bottom for max transfer.
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