Barrel offset distance

I want to off set my barrel that sits on the J-tube/heat riser. How far can I go with this? Can you go too far? I want the main heat going away from the wall and into the room. I'm not sure how to build the transition from heat riser, down the sides of the barrel, into a transition/clean out area, and on the the flue/stove pipe...

You can put your riser completly agianst the barrel no problem just make sure to make the top gap above the riser is a littel bigger 1/2" will do

Karl: thanks....

Brian: I'm following your info on this....

Pack : there are reflective barriers that are foil only with no insulation, when they have an air gap on both sides they reflex back 85% of the radiant heat back at the heat source.

This is usually sold in builders supply stores to be used to isolate the hot attic from the rest of the house and is fur striped up off of the insulation to create the air gaps toward
the insulation and the foil is effective in preventing radiant heat energy transfer down into air conditioned spaces.

Where the air conditioning is in the attic space, the foil is fastened to the underside of the rafters being careful to not block the air vents at the soffit and facia, this will also
reduce the amount of radiated heat that enters this area ,its final temps, and decreases the heat load on the air conditioning !

So- For the price of a six-pack of beer you should be able to score a big enough piece as a remnant to do your whole job, alternately a backerboad covered with foil, and air
gaps made with minimal stand offs or even hanging a piece of metal roofing like a picture from your over head joists will all effectively work to protect an exposure ! Big AL

allen: great ideas.....thanks. I pick one of them!