Why would you ever want to? Heat's 1-1 in terms of generation to acceptor to everything except the steam boiler. As well as, moving heat around stored in a fluid being more efficient, and cables massively complicating how hU works to make cable branches possible. That said, Aroma did make an example of them and a kU cable, somewhere around the addons section.
Copper conducts heat very well... Why not just modify copper cables to double as heat cables? Perhaps the loss over distance would be much greater than with electricity.
