hey guys and guys, i am a noob when it comes to wood heaters and flues. i am a roof plumber by trade and have had a little portable pigtail wood heater for camping which i installed in my rental with downpipe out the back garage door and it worked a treat. now im in my own home and have made my own vertical heater with an old hot water storage cylinder and using 90mm round downpipe that is roughly 4m above the top of the heater. when i start my fire and when i have the main door open it all wants to come out of the main door, i ended up drilling 4 holes above and below my grate with no results except in the picture attatched it wants to come out the holes. i have a diy downdraft diverter in between top of heater and bottom of flue, it is very ashy and when i open the main door it comes out.
The other 2 things i havent tried.....inside originaly it had an 80mm tube all the way through, i used a grinder to cut both bottom and top inside of it but i could only get it with about 150mm left internally just below the flue, the other being i havent tried a bigger flue. trying to avoid purchasing anything if possible. to note i also dont have a cowl on it currently. i understand its too close to the brick wall, i also dont have a ceiling flange yet as i want to move it once i get it right. my thoughts are all leading to a bigger flue, the main door is 350mm wide and 250mm high. the lower ash door is 200mm wiode and 150mm tall. the grate sits about 50mm above the top of the ash door, there is about 450mm - 500mm above the main door. maybe these proportions could be wrong.
any help would mean the world. im just about fed up and gonna go buy a coonara.
cheers, scotty.
