4 ms·
Its much harder on the tube, as where do you dump the hot air? Back into the tunnel? London's clay has basically baked around the tube and is a really good insu
by Milner08 4y ago
Its much harder on the tube, as where do you dump the hot air? Back into the tunnel? London's clay has basically baked around the tube and is a really good insulator. Its not a particularly easy problem to solve.
- munificent 4y agoYou vent it to the surface, at least that's what NYC does.
- Symbiote 4y agoThese tunnels are much deeper. The trains running in tunnels of similar construction to NYC have AC.