VigIIPeaBurner wrote:A rheostat, possibly, along with a barometric damper (recommended), is necessary to set the proper over fire draft with the aid of a manometer. I think SWG powervents from LL come with a rheostat. The speed of the powervent fan supplies the draw (draft) on the stove's exhaust system. Draft levels must be properly set over the fire and before the barometric damper to assure the efficient use of coal and transfer of heat from the stove/furnace/boiler.
The power vent NEEDS A RHEOSTAT. That is why LL supplies one with the units.
As mentioned it must be used in conjunction with a baro to dial it in. We have had members here who tried to run it full bore without the rheostat and it led to hopper fires due to too much draft. And it also sucked the heat right out of the stove and burned way too much coal.
You need a fan control type rheostat. A regular light dimmer switch will not work.