I have an Englander 25PDV, and in the owners manual it says to always hit the off button befor refueling the unit. It also states how the stove is designed to operate continuously so frequent shutdown is not required. My question is how do I go about doing this? Do I just hit the off button, refill, and then turn on again?, or do I have to wait for the whole 20 minute shutdown feature and then open the lid. I understand that there is a vaccume system to the stove, and I wasn't sure what opening the hopper lid would do to the air intake and exhaust. Its my first year useing the stove, and so far I have only needed it on a few nights, but soon enough I will need to have the stove going for much longer periods of time and I dont want a long daily shutdown/refueling procedure.