'Cool' in the Bible

Ehud approached him while he was sitting by himself in the cool roof chamber of his palace. He said, "I have a message from God for you!" So when Eglon got up from his seat,

Then Ehud left the cool chamber in the direction of the vestibule, shutting and locking the doors behind him.

After he left, Eglon's attendants came to look, but the doors to the cool chamber were locked! So they said, "He must be relieving himself in the inner part of the cool chamber."