Here is the bottom half built with the pin kerbs that separate the two chambers. That is the first course of normal bricks you see on the top. All those beneath are engineering bricks that are hopefully less likely to crack.
And here it is all finished except one brick. We ran out.
You might just be able to see the holes at the bottom for the air intake and the holes at the top for the chimney. We've decided to go for a smaller bore of pipe because four or six inch pipe would rip air through at quite a rate so I'm now after some small bore flue liner, possibly from a caravan.
We might have issues with the pin kerbs cracking if it gets too hot. Hopefully we'll have good control over the temperature with dampers fitted to the air intakes and outlets. But it's looking good! Can't wait to get the metal work done.
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