In TOS "The deadly Years":
Captain's log, stardate 3579.4. The Enterprise personnel who beamed down to the planet's surface, Doctor McCoy, Engineer Scott, Mister Spock, Lieutenant Galway, and myself are all showing definite signs of aging. Only Ensign Chekov appears to be normal.
In the scene in Sickbay which immediately follows that log:
MCCOY: I'm doing what I can. (to Spock) You're perfectly healthy.
SPOCK: (sitting up) I must differ with you, Doctor. I'm having difficulty concentrating, which is most disturbing, my eye sight appears to be failing, and the normal temperature of the ship seems to me to be increasingly cold.
MCCOY: I did not say you weren't affected, Mister Spock. You are perfectly healthy, that is, for any normal Vulcan on the high side of a hundred.
Considering that Spock should be only in his thirties, he should have aged at least 60 or 70 years.
[digression about Spock's life expectancy. Earlier in that scene:
MCCOY: All of us who went down to the surface, with the exception of Chekov, are aging at various rates. Approximately thirty years for each day. I don't know what's causing it. A virus, a bacteria, or evil spirits, but I'm trying to find out.
KIRK: Spock, could I ask for some figures?
SPOCK: (looking about the same as usual) Based on what Doctor McCoy gave me, I estimate that physically we each have less than a week to live. Also, since our mental faculties are aging faster than our bodies, we will be little better than mental vegetables in considerably lesser time.
Approximately 30 years per day or 1.25 years per hour implies that none of them could have expected to live as much as 210 more years, which seems reasonable.
Since there are 168 hours in a week, and each of them had been hyper aging for an unspecified number of hours, we can make some guess at Spock's life expectancy. If, for example, Spock aged 1.25 years per hour, and aged at least 60 to 70 years, for each hour that he could expect to live, his normal life expectancy would have been up to 210 more years after aging to more than 100 years old!
Obviously there is something wrong with those calculations. McCoy said Spock was healthy for a Vulcan over 100, but Spock is half human.
Late Commodore Stocker asked Spock to take command of the Enterprise:
SPOCK: On what grounds, Commodore?
STOCKER: On the grounds that the captain, because of his affliction, is unable to perform his duties.
SPOCK: Need I remind you, sir, that I too have contracted the same affliction?
STOCKER: Yes, but you're a Vulcan. You have a much greater life span. You show the affects to a much smaller degree.
SPOCK: I'm half human, sir. My physical reflexes are down, my mental capacity is reduced. I tire easily. No, sir. I am not fit for command.
STOCKER: Well, if you are not, with your Vulcan physique, then obviously Captain Kirk cannot be.
So maybe Spock, who was probably in his thirties, had aged only 30 to 40 years to become the equivalent of a Vulcan over 100 years old. If Spock aged 30 to 40 years of his half Vulcan life expectancy in 24 to 48 hours, he would have aged about 0.625 to 1.666 years per hour, and thus he could have up to 105 to 279.9 years of normal life expectancy left if he could survive up to 168 more hours of hyper aging. That seems more plausible.]
Some time and several scenes later:
SPOCK: I have a question for the doctor. (Kirk leaves) Doctor, the ship's temperature is increasingly uncomfortable for me. I've adjusted the environment in my quarters to one hundred twenty five degrees, which is at least tolerable. However, I
MCCOY: Well, I see I'm not going to be making any house calls on you.
SPOCK: I wondered if perhaps there was something which could lower my sensitivity to cold.
MCCOY: I'm not a magician, Spock, just an old country doctor.
SPOCK: Yes. As I always suspected. (leaves)
125 degrees Fahrenheit is 51.6667 degrees Celsius, and 125 degrees Celsius is 257 degrees Fahrenheit.
I think 125 degrees Fahrenheit would be much more plausible, since Spock was obviously used to even higher temperatures. I note that 125 degrees Fahrenheit would be about 50 degrees Fahrenheit higher than a human ship's normal temperature.
If the Vulcans who spend time on Earth and on Earth spaceships and installations are all young and healthy, the equivalents in age of human teenagers and twenty something and thirty something persons, they may be able to tolerate temperatures that humans find comfortable for long times.
I note that Spock was already stating that the ship's temperature was uncomfortable for him when McCoy said that his condition was equal to a healthy to a Vulcan on the high side of 100. In "Journey to Babel" Spock's father Sarek, aged 102, and his human wife Amanda, travel on the Enterprise and share quarters. In the TNG episode "Sarek", Sarek spent some time on the Enterprise D when his age was apparently 202, and his second wife Perrin, also a human, apparently shared his quarters. How Sarek and his human wives managed to be comfortable at the same time is a mystery to me.
