Is it necessary to insulate the space inside the chimney duct between the panel and the sandwich pipe?
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viewsGood afternoon. I ask you to consult on the device of an external chimney of a fireplace.
The question is as follows. The external chimney itself is made of a sandwich pipe with a diameter of 200 mm. and a thickness of steel 0.8 mm, insulation 50 mm (basalt) factory-made. According to the architecture of the house, we beat it with a decorative box 1200 * 600, made of a metal profile for the installation of finishing panels (the facade of the house is ventilated from KMEW fiber-cement panels).
Tell me, is it necessary to insulate the space inside the box along the entire height of the structure (8 m) between the panel and the sandwich pipe? If so, what would you recommend? Thank.
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Hello, it’s better to insulate of course. The insulated chimney pipe (even though it has a sandwich structure) will cool down much more slowly, which will give you a correspondingly longer cooling of the entire heating system. And also warming will increase the service life of the pipe sandwich, since slow cooling prevents a quick narrowing-expansion of the pipe, and, as a consequence, its deformation. Of course, it is possible to insulate with mineral wool, but at the same time it is necessary to execute a sealed box that protects the mineral wool from external moisture.