Tynan mentioned a natual temperature change inside mountains as of alpha 15

[Franklin]

Any know the details on that change? Obviously under-mountain rooms will be cooler, but does that also mean they'll be colder when it's cold outside? Will they be more difficult to heat?

[SimpleMachine88]

Or easier to heat?

I would like to second this topic, I'm also really interested in the maths here.

[buttflexspireling]

Well, I thought there was some mention about the 'secret fire of the alchemists' and four grades of fire from the most material to the
most spiritual. Perhaps that's what he meant...

[Franklin]

I know the patch is still new but nobody with any other insights?

[PotatoeTater]

Mountains are cooler than the outside areas by default. If you are playing tribals, the mountain is the best place to build since you will not require much AC.

[ThiIsMe007]

Mountains are cooler than the outside areas by default.

I guess I'm not going to be the first to say this, but this is not how one could expect temperatures to behave in (deep) mountain caves (and when it's very cold outside).

Since I haven't played a15 yet, I also would like to know if this has changed (for the better). That would save me a mod slot.

[FMK]

From the looks of it, it seems that 'natural' (ie: non-cooler/heater/vent) temperature change within mountains (and maybe just in general) is significantly slower in Alpha 15.

In Alpha 14, if a Solar Flare knocked my power offline, stuff in my freezer would get above freezing well before a longer Solar Flare ended. In Alpha 15, I don't think that's managed to happen even once so far.

Similarly, a constructed roof freezer in Alpha 14 would insanely quickly hit above freezing when a solar flare hit, even at -20C. In Alpha 15, it manages to stay below freezing for a significant part of solar flares.

[Dave-In-Texas]

Mountains are cooler than the outside areas by default. If you are playing tribals, the mountain is the best place to build since you will not require much AC.

In winter i'm resorting to a partially unroofed room for my freezer and i've been expanding it slowly.
I have double walls on the base side and as I expand the underground side I'm seeing that the same number of open roof squares isn't keeping the temp in line with the outside.  for example: it will be 17f outside but 39f in the freezer.  I expanded the unroofed section by 2 and it went back in line with outside.  so Something is going on

[ThiIsMe007]

From the looks of it, it seems that 'natural' (ie: non-cooler/heater/vent) temperature change within mountains (and maybe just in general) is significantly slower in Alpha 15.

In Alpha 14, if a Solar Flare knocked my power offline, stuff in my freezer would get above freezing well before a longer Solar Flare ended. In Alpha 15, I don't think that's managed to happen even once so far.

Similarly, a constructed roof freezer in Alpha 14 would insanely quickly hit above freezing when a solar flare hit, even at -20C. In Alpha 15, it manages to stay below freezing for a significant part of solar flares.

Thank you very much for your feedback.

That's excellent news.

[Barak0000]

In reality building underground moderates temperature changes - so they should be affected less by the outside temperature. I almost always built my colony freezers into mountains just because it "felt right" and seemed more realistic.

So glad it sounds like there's now a mechanic that makes this worth the inevitable insect infestations... (Especially as the only decent method I've come up with of exterminating them is to incinerate everything...)