Is that pink-stuff insulation a second layer or is it the only layer?
If it is the only layer then flip it over. If it is a second layer, then you *should* peel off the kraft paper or get unfaced batts as a second (or more) layer in an attic.
wheres the outside air for the combustion?
is it the floor grill on the left of where you are standing?
i tend to recommend bringing the outside make up air under the free standing with an opening close to the front.
there is an additional gizmo that you can lash into the stack....which looks like a coffe pot / flour sifter ...it reduces stack to very low temps and reduces particulates by collecting them out of the previous combustion process. you can remove it close a little slider door ,clean it with the sifter squeezer handle and put it back from whence it came... i wish i knew who made them they have been around for a while...