I know nothing of pellet stoves and was entertaining the idea of one in the basement. It would be used strictly to maintain a 65 degree temp in the basement. My walls have 1" foam under drywall. I have a secondary through wall terra cotta thimble for a wood stove. Can i vent into this? Does a pellet stove require a full liner to the 30 ft roof top? Or do they burn clean enough to cap that thimble and into it? Maintaining 60-65 how long would a bag of pellets last? Thanks