How much does it cost to operate a steam room? Customer Support February 02, 2021 21:55 Updated around 15p per hour, however, it's recommended that you only steam for around 20 minutes. Related articles How strong is the tray? What should i expect to pay for install? Steam facility. What should I expect from my shower? What is a steam shower? How to remove the thermostatic cartridge Comments 0 comments Please sign in to leave a comment.