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Isolation Heat riser

 
Posts: 14
Location: Latvia
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hi folks,

how I can isolate the heat riser without "Perlite"?
Can I use rockwool?

Perlite in Latvia not exist... and to Import 10 kg is much to expensive ......
Hope you can help me

Tx a lot in front from the cold Latvia
Thomas
 
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Posts: 3045
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
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Thomas, 5 to 10 cm of rockwool is perfectly fine. As good as perlite and better than vermiculite. Ashes can do the job too, in bigger thicknesses. Let say a 10cm layer of ashes around the heat riser.
 
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