someboater wrote: ↑Wed. May. 16, 2018 7:46 amThanks. I thought it was meant to be as close to the stove as possible. Your comment is very handy for me
I had ideas about making a damper using an aluminium disc with holes drilled and tapped to take bolts one of which would be a ringbolt to provide a point to rotate it.
Not sure if the aluminium would be liable to melt. It's a lot easier to drill and tap aluminium than steel or iron.
I envisage using a 60mm flue pipe so I don't think there is an "off the shelf" option available.
Yes, aluminum has a much lower melting point than steel, but you have to be realistic about where it is in relation to the heat source.
The stove and the pipe would all have to reach cherry red, which would set the boat on fire before an aluminum damper a few feet up the stove pipe from the stove would get hot enough to melt.
Paul