Finally, their suggestion was for us to open windows. The room was 71☏ to 73☏ for the first couple days while they tried to “fix” the issue.
We are generally comfortable at 67☏ and sleep at 65☏. While we were there, they still had it on heat because of the cool nights. Temperature control is either heat for the whole day or air conditioning for the whole day.
We did not use the bar/lounge, the business center, nor the fitness center. We stayed on the 18th floor in a one bedroom suite.