Hi Barry, For the 2 months out of the year we here in Minnesota don't
need a room heater....har har.
 
I use a small 1500 watt, room air heater, modified so the fan runs all
the time. This with a digital thermometer reading the temp. I keep the
chest under 160 deg's F.  It'll do a 5 gal. pail in about 12 hours.
Therm. also in the honey.
 
Stir it! Burning not allowed here!
 
Oh and cut a good size hole in the box. 3 or 4", you don't want to find
one of the kids...(PS- this setup also works well for drying pollen)
 
Regards - Scott