Ceiling fans cool you down by blowing air across your skin causing evaporation of moisture which cools your skin. Great in Summer, not so good in...
The ashes from the stove on a damp newspaper work great, except for some really stubborn cases. That's when I would use the cleaner made specifically...
I agree, I would not use the chimney pipe. If you do anything that cools the pipe too much, you will not only reduce the draft but build up more...
How large a ZC fireplace you need really depends on where your house is located (climate), the ceiling heights, the amount of insulation, the layout...
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