Guide to Steam Rooms in Gyms
Steam rooms use humid heat in a sealed space, which feels different from the dry air of a Finnish-style sauna. The air is cooler than in a dry sauna, and the humidity is what makes the heat feel intense.
In this guide
What is a steam room?
A steam room is a sealed wet-heat space filled with humid steam. Gyms often list it alongside saunas in locker-room or spa areas.
Temperatures are typically lower than dry saunas, around 110–120°F (43–49°C), compared with roughly 158–194°F (70–90°C) in a traditional dry sauna. Humidity is the bigger gap: steam rooms sit near 80–100% RH, versus roughly 5–20% RH in dry-sauna air — which is why the cooler steam still feels intense. Breathing can feel thicker; many people use shorter stays than in a dry sauna.
The equipment behind the steam
A steam room is a tiled room with a steam generator piped into it, usually in a mechanical closet or under a bench. The generator, not the tiles, sets how fast the room fills and how well it holds heat when the door opens.
Generators come from a few makers. ThermaSol, Steamist and Mr. Steam are the names that turn up in U.S. clubs.
ThermaSol (opens in a new tab)
thermasol.com
U.S. steam generator maker common in clubs and spa-style locker rooms.
Steamist (opens in a new tab)
steamist.com
Long-standing U.S. steam generator brand, now part of Delta Faucet; existing rooms still use it while new systems are sold as Delta or Brizo.
Mr. Steam (opens in a new tab)
mrsteam.com
U.S. steam generator maker based in Long Island City, New York.
Clubs rarely post the model; what you can check is how quickly steam arrives and whether the room stays hot with people coming and going.
What to look for at a gym
Look for steam room, or just “steam”, in the sauna types or amenities list. Confirm it is open during your visit hours and included with your pass or membership.