A Great way to Protect yourself from the Woodstove Destroying move of "Pumping" or "Blasting" your fire by opening the bottom ash door when starting your fires, is to Use a Top Down, or Upside Down Fire Starting method. Not only will it help you from potentially ruining (Cracking, Warping parts) and prematurely wearing out your stove, it also just works better and makes much less smoke than the old bottom up way. Opening the ash door on a Top Down start up has little effect on the fire, so it does not help blast it. That's a good thing.