Highlander Anderton wrote:I will have to build the firebox from firebrick so I am trying to work out exact dimensions. If you have those it would save me a lot of guesswork. I have already downloaded the free version of the Sketch up viewer. I now see the P chanel but the cross sectional view does not really give me a good view of where exactly it opens into the riser.
Highlander Anderton wrote:Could I use a metal pipe for the riser? If so how thick should the metal be to withstand the heat?
Highlander Anderton wrote:The diagrams show a double pipe which I assume would be in-filled with insulation, what would be a reasonable diameter for this outer pipe?
Highlander Anderton wrote:At what height would the riser end? In other words how much of a gap should I be leaving between the top of the riser and the brickwork above? (or how long should the heat riser pipe(s) be)
Highlander Anderton wrote:The top part would be tricky but do-able in brick but it could also be cast in fire-proof casting cement (not sure if this is what you guys call refractory cement?)creating a nice curve to roll the heat over and down the sides & yes, I would certainly use mortar between the bricks all the way down the sides as in the original Finnish stove design. I have old, hand made bricks which I salvaged & which I wanted to use (?).
Highlander Anderton wrote:I don't see the door being a problem, I have several old cast iron doors for these ovens in different sizes and most have an adjustable air inlet at the bottom which I can modify to let in the required amount of air, the metal skin of the oven is good grade steel so very weldable if I should need to put in a smaller door than is standard.
Highlander Anderton wrote:There is also a clean-out hatch at the base of the oven (see previous photo). so I will have to add some different brickwork at the base, also to hold up the fire-brick built fire-box. Chimney sweep must have access right through the stove to the base of the chimney for a vacuum hose.
Highlander Anderton wrote:Directly above the stove is the horizontal slit in the wall for the 'Pelti' (is this what you refer to as a damper?) in normal operation of the original stove one would burn one load of wood and when it is down to just embers the 'pelti' is slid in closing off the chimney and retaining the rest of the heat. Are you saying that I should forget this and seal up the slit in the wall?