I have been informed that I need to read the documentation more carefully (it looks I need to be setting default_temperature on an entity).

Ah, good to know. Well, the reason this came up was that I was trying to set the temperature of a reactor to less than zero, but it won't go below 15C (which I had assumed might be to do with the way temperature was represented internally). So, then, it looks like there's some kind of artificial ...

TL;DR
An absolute temperature scale (e.g. Kelvin) should be used internally rather than the current relative temperature scale to allow for entities to have temperatures below 0C.

What ?
Essentially, this is a proposal to shift the zero point of the temperature scale, so that 0C becomes 273K ...

I implemented pollution-specific deaerosolization recipes, and it works amazingly . They deaeros can no longer bring pollution to zero - the four tiers bottom out around 1500, 1000, 400, and 100 - and it finally means sludge from nothing is no longer possible.

Here is the efficiency curve I ...

I implemented pollution-specific deaerosolization recipes, and it works amazingly . They deaeros can no longer bring pollution to zero - the four tiers bottom out around 1500, 1000, 400, and 100 - and it finally means sludge from nothing is no longer possible.

Here is the efficiency curve I went ...