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Sauna and Exercise for Cold Relief and Prevention: A Complete Guide
How a sauna is planned next to a gym or home training room: position, size, heater, ventilation, showers, timing between training and heat, and upkeep.
Sauna Dekor Spa Solutions — designing, manufacturing and installing saunas, steam rooms, hammams and pools since 1987, in our own facility in İkitelli OSB, Istanbul.
Last updated: 12 November 2026
Short answer: a sauna next to a training floor is planned around the people who use it straight after a session: a short walk from the gym, a shower before the cabin, a heater sized to the corrected room volume, fresh air in and out, and a floor that drains. Sauna Dekor designs, manufactures and installs these rooms.

Why do gyms and home training rooms put a sauna next to the workout area?
Because people use it straight after training, while they are still changed and before they shower and leave. A sauna that is a short walk from the training floor gets used; one on another floor is often skipped. In hotels, clubs and villas the sauna is usually placed between the changing room and the gym, with the showers on the route.
This page is about the room: where it goes, how big it is, what heats it, how it breathes and how it is looked after. It does not make claims about what a sauna does for the body. Anyone with a medical condition should ask their own doctor before using a sauna.
Where should the sauna sit in relation to the gym?
On the route from the training floor to the changing room, with a shower before the sauna door. That order keeps sweat and chalk out of the cabin, keeps the benches cleaner and shortens the walk. A rest area with seating and drinking water close to the sauna door completes the sequence.
- Gym or training room, then showers, then sauna, then rest area.
- A floor drain in the shower and rest zone, not inside a dry sauna cabin.
- Non-slip floor finishes on the wet route.
- A clear door swing outward from the cabin.
How big should a sauna be for a gym or home training room?
Size it from the busiest hour, not from the floor plan. Count the people you expect after the most popular classes, allow bench length per person, then add the heater guard zone and the door swing. A home training room is usually served by a two- to four-person cabin; a commercial gym is sized from its peak attendance.
Bench layout, tier heights and the clear space above the top bench are covered in our guide to sauna bench height, and room sizing for gyms in our page on gym saunas.
Which sauna types suit a gym?
| Type | Cabin air | Heat source | Notes for a gym |
|---|---|---|---|
| Finnish sauna | 80–100 °C | Electric heater with stones | Duty-rated heater and robust benches for heavy daily use |
| Bio sauna | 50–65 °C | Combined heater with water reservoir | Gentler heat; reservoir needs daily filling and cleaning |
| Infrared cabin | 45–60 °C | Infrared emitters in walls and under benches | Lower air temperature; dedicated electrical circuit |
Source: Sauna Dekor approved design values (Finnish sauna 80–100 °C, bio sauna 50–65 °C, infrared cabin air 45–60 °C).
How is the heater sized?
From the corrected cabin volume. Harvia gives an average of about 1 kW of heater power per cubic metre of room volume, and adds about 1.2 m³ for every square metre of uninsulated glass, stone or concrete surface. The result is a minimum; the chosen heater's published volume range must contain the corrected volume. In a gym, where the door opens often, a heater at the upper end of its band holds temperature better.
The heater, its control panel and their certificates come from the heater manufacturer, such as EOS or Harvia. We size, install and commission them. More detail is in our guide to sauna heater sizing.
What ventilation and electrical supply does the sauna need?
Fresh air in low near the heater and air out on the far side, so the cabin is refreshed during use and dries out afterwards. The heater needs its own circuit sized to its rating, installed by a licensed electrician to the local rules; IEC 60364-7-703 covers rooms and cabins containing sauna heaters. In a gym, the cabin's extract is planned with the building's ventilation so the changing rooms do not draw warm, moist air.
How do people usually move between training and the sauna?
Most users finish their training, cool down, shower and drink water before going into the sauna, then rest between rounds. Session length and number of rounds are personal choices; many gyms display simple house rules at the door, such as showering first, sitting on a towel and leaving the cabin if they feel unwell. Our sauna rules page lists common ones.
- Shower before entering.
- Sit or lie on a towel.
- Drink water before and after.
- Leave the cabin and cool down if you feel unwell.
Can a cold plunge or shower be added to the same circuit?
Yes. A cold shower, a shock bucket or a cold plunge pool next to the sauna lets guests cool down between rounds. We build cold plunge pools for water temperatures from 2 to 15 °C, with the chiller, filtration and drainage sized with the shell. See our cold plunge pool and shock bucket pages.
What maintenance does a gym sauna need?
Daily: wipe and air the benches, check the heater guard and the door, empty and refill a bio sauna reservoir. Weekly: clean the floor and the bench undersides. Periodically: check and rearrange the heater stones and replace cracked ones, and have the heater and control serviced as the manufacturer specifies. Heavy-use benches are made removable so they can be cleaned and dried.
Who designs and builds saunas next to gyms?
Sauna Dekor Spa Solutions designs, manufactures and installs saunas, steam rooms and cold plunge pools for gyms, hotel fitness floors, sports clubs and private homes. The cabins are built in our own facility in İkitelli OSB, Istanbul, where we have manufactured since 1987, and installed by our own teams. See gym sauna, steam room and plunge pool packages.
Frequently asked questions
Where should a sauna go in a gym?
On the route from the training floor to the changing rooms, with showers before the sauna door and a rest area beside it.
What size heater does a gym sauna need?
Harvia gives about 1 kW per cubic metre of corrected room volume, adding about 1.2 m³ for each square metre of glass, stone or concrete. The chosen heater's published volume range must contain the result.
Which sauna type is used most in gyms?
The Finnish sauna at 80–100 °C with a duty-rated electric heater; some gyms add an infrared cabin at 45–60 °C or a bio sauna at 50–65 °C.
Does a gym sauna need its own electrical circuit?
Yes. The heater needs a dedicated circuit sized to its rating, installed by a licensed electrician; IEC 60364-7-703 covers rooms containing sauna heaters.
Sources
Our work
Sauna projects

[ Author ]
Alican Aykaç · Managing Partner, Sauna Dekor Spa Solutions
Sauna Dekor Spa Solutions has designed, manufactured and installed saunas, steam rooms, hammams and pools since 1987, in its own facility in İkitelli OSB, Istanbul: 5,000+ projects in 41+ countries, including 577+ hotel and resort projects.
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