So, to make temp. a lot easier to transfer, we should have remote temperature. There would be a in-type and out-type similar to portal, and it would have channels, also similar to portal. The median of the temperature of the pixels directly around the in-type would cool/heat all of the pixels directly around the out-type the to the median.
@Cr15py I know that, but those are not strong enough for extreme temps... My idea wouldn't cool down the input like yours does, and it would be 100% efficient, where as that is about 50% efficiency...
This is because my idea is a 1-way heat transfer, but yours is a 2 way which allows for 50% efficiency and an inability to transfer extreme temps...
It can be done already using normal elements. 100% efficiency is not required if you're only using like one particle, and the cooldown is obviously expected because remote heat would share particles.