I recently moved in a house with a model 100 earth stove. I have used it for a week or so this fall. Seems to work well. I talked to the local stove shop, they said that it is recomended to plug off the vent pipe that runs up the center of the chimney. There is also two small vents that go from the back into the firebox. Should a person plug those also? They didn't know. Also had touble replaceing the door seal. Used 1 1/4" rope but couldn't shut door. Any hints?