Husqavarna Guy
ArboristSite Operative
The only concern I see with the install is the lack of a clean out in the rear of the furnace .in my experience Flaky stuff will accumulate there and you'll have periodically disassemble that to get to it or it will plug especially if your wood is only half seasoned . I have a tee on mine and it is recommended in the book to have one if you set it up this way
Can you post a pic how yours is hooked up in the back flotek? Thanks