During the first chapter, A life full of promises, after going down the stairs, go a little to the right and you will see the double doors to the Spa on your left. In here move forwards and to the right, you will see the sauna in the corner. Go inside, turn around and click the red button so it is green. Turn back around and sit down on the right, wait a few minutes and the achievement will pop.
I was able to do this after going to the basement but it should also work before given that task.