POTENTIAL SPOILER WARNING
If, like me, you LOVE the thermal plant but think it is WAY too annoying to place down, just use foundations (big flat square base thing). Just put a foundation over the vent, and put thermal plants on the foundation (which is over the thermal plant). BOOM now you have 4 perfect thermal plants on one foundation. Now, just use power transmitters to connect it to your base. (Idk if this is common knowledge, just thought I'd share)