for my whole system Sean I use
2 x 300Watt Ebo Jagers
2 x 250Watt Tronic
1100W of heaters and they hardly come on but they are there just in case.
On another note my tank room stays between 76deg in the evening and 81 in the day time. This is durring winter of course. Your tank room(with your cold air feed for the furnace is pulling in -30 deg air. BIG DIFFRENCE. With this weather you will have problems.
MORE HEATERS! Oh Don't forget they cost money to run
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No matter what the morrow brings, inventors keep inventing things.
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Jonathan
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www.cakerybakery.ca