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A few years ago we got a new heat pipe between the two apartment blocks. The block from where I have taken the picture supplies the other block with hot water.

I am very surprised that the pipe can heat up the ground in such a large area and even melt the snow.

Question

Is this normal/expected that heat pipes does this?

enter image description here

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Normally, these things are run through an insulated conduit. There's only so much that insulation can do. It only slows down heat migration. You have a system that runs 24/7. That's a lot of time and a lot of heat over time. Unless you have a long term cold spell, this is pretty normal. –  Fiasco Labs May 26 '13 at 16:33
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