We are installing a Jotul 602 v2 in our basement (small house). In order to improve the draft, we're thinking about using a double wall stove pipe and elbow to connect the stove going up and through the thimble to the chimney. My question is: can we connect a single wall pipe from the elbow going through the thimble to the chimney? Or, is it best practice to stay with double wall for all of our stove pipe sections? Thanks kindly for any info. I've been reading till my head is spinning and can't figure this one out.