Combustion Blower Rheostat Kit (4100)
Why add the Rheostat kit to my older stove? : Adding this kit can improve the BTU output by 10% by allowing you to 'fine tune' the combustion process. (The standard combustion blower operates at constant maximum speed.) The original reason for its manufacture was so that older stoves can use the negative draft kits, because they did not have the internal allen screws in the back to adjust airflow to optimize for wood pellets and could not be converted without this rheostat kit. Older corn stoves include, CornFlame, CornGlo, SnowFlame, and some older AmaizAblaze (Nesco Corn Stoves) stoves. Increasing combustion air pressure may increase the BTU output, but will also increase fuel consumption.
For what other reason would I add the Rheostat kit to my stove?: Since the negative draft kits were introduced, we have learned that the safety feature built into the exhaust motor can actually shut down the exhaust motor when you did not want or expect that to happen. The safety feature is a 270 degree thermo-disc internal to the motor. Amaizablaze is in search of a higher temp model, but no joy so far. The motor temperature may rise above 270 degrees when you have your room blower on low. This causes more heat to build up in the firebox and exhaust, thus exceeding 270 degrees and abruptly shutting down the exhause blower motor. The result is loss of fire and the abrupt stop causes more smoke than normal that you may smell in your home (the smell of burnt cornbread). The Rheostat allows you to slow the rate of exhaust flow and keep the exhaust temp lower preventing the safety device engagement.
Will the Rhoestat Kit save me money?: YES!! You should recoup your cost within a month or so through fuel savings because of the higher efficiency.
What else could I do to lower the exhaust gas temperatue?: When you slow the room air blower, also reduce the amount of fuel feed and lower the firebox, which lowers exhaust gas temp.