Tom:
If you have radiant heaters, just setting the pan next to the air flow will get the moisture into the air and will save you the additional expense of burning the moisture into the air via your stove...
100% moisture will migrate to lower percentages of moisture...i.e.: that pan should evaporate into your room(s) if the home is fairly dry...and as Robert Roe pointed out, too much IS NOT A GOOD THING...
Let nature handle it for you...and since you're using your home's heating system...let it work a little harder for you...let that heated air pull the moisture from the pan(s) and insert the moisture...
Beats you paying the electric/gas company any more money than they're entitled too!
Besides, the way you're doing it...it's almost the same as sticking a fan in front of an open refrigerator/freezer to cool your home, or using the oven/fan combo to heat the place...the latter is, usually, responsible for burning down a few homes/apartments during the winter, each year...
