Guys, I bought some corn that was way cheaper than normal, and I am paying the price. The clinker, or waist doesn't pop out very well, so I have to wait for the furnace to cool down to remove the fire pot. In that short time, the gas heat kicks in. I'm not sure how many therms I am using, but instead on the gas kicking in once a day for about 15 minutes, it will run for 30 minutes at a time, with only 10 minute off interval averages to keep the house at 68 degrees. Once the corn is burning good and hot, the gas doesn't come back on, but I'm curious to see how this will affect my gas bill.