How to Maintain a Stable Temperature in a HOT STUDIO Throughout Every Class
Reaching the desired temperature is only the first step. The real challenge is maintaining consistent thermal comfort and a well-controlled indoor environment throughout the entire class.
One of the main challenges fitness clubs face when operating a HOT STUDIO is not simply heating the room to the required temperature. The real test begins once the class is underway.
At the beginning of a session, the room may feel slightly cool. However, after 20–30 minutes of exercise involving 20–30 participants, both the internal heat load and moisture levels can increase significantly.
If the heating and ventilation systems are not properly coordinated, the room may become overheated, temperatures may vary across different areas, and indoor air quality may deteriorate.
As a result, members may not receive the premium training experience they expect, while fitness club operators may face complaints about excessive heat, insufficient warmth or stuffy conditions.
Depending on the type of class, HOT STUDIO temperatures may range from 28 to 42 °C, from moderately heated Pilates and fitness sessions to high-temperature yoga classes.
The objective of professional HOT STUDIO design is not simply to reach a target temperature, but to maintain stable, controllable thermal conditions and good indoor air quality throughout the session.
Why Can Conventional Air Heating Present Challenges?
Conventional convection heating systems primarily heat the air inside a room. In a HOT STUDIO environment, this approach can present several challenges.
Temperature Stratification
Warm air naturally rises due to convection. Without sufficient air circulation, temperature differences may develop between ceiling level and the floor.
The air near the ceiling may be considerably warmer, while temperatures at floor level, where yoga mats are placed, may remain lower.
This is particularly important for HOT YOGA and Pilates classes, where exercises are performed both standing and on the floor. As a result, participants may experience different levels of thermal comfort within the same room.
Participants Generate Additional Heat
This is an important factor that should not be overlooked when designing a HOT STUDIO.
Depending on the intensity of physical activity, each participant may generate approximately 150–250 W of heat during a class.
This is comparable to the output of several electric heaters operating simultaneously. Participants also release moisture, which further affects the indoor environment.
For this reason, heating a HOT STUDIO before a class is not enough. The heating system must be able to respond automatically to changing internal heat loads.
Otherwise, the room may become excessively warm during intensive sessions.
Why Choose Infrared Heating for a HOT STUDIO?
Infrared heating is well suited to spaces that require elevated temperatures and consistent thermal comfort.
Unlike conventional convection heating, infrared panels transfer a significant proportion of their heat energy through radiation.
Infrared radiation directly warms:
People
Floors
Walls
Equipment and other surfaces
These warmed surfaces subsequently transfer heat to their surroundings.
This heating principle helps create a more uniform radiant thermal environment and reduces reliance on warm-air circulation alone.
The main advantage of infrared heating in a HOT STUDIO is its ability to deliver radiant warmth directly to people and surrounding surfaces.
However, maintaining stable conditions also requires accurate temperature control, appropriate panel positioning and effective ventilation.
Key Principles of Professional HOT STUDIO Design
1. Accurate Heating Capacity Calculations
Professional HOT STUDIO design begins well before the first infrared panel is installed.
The required heating capacity should be calculated by considering:
Room area and ceiling height
Window area and thermal insulation
Ventilation system characteristics
Required operating temperature
Maximum number of class participants
Desired room warm-up time
The SUNDIRECT manufacturer's recommended heating capacity for HOT STUDIO applications is approximately 220 W/m².
This figure serves as a design guideline. The actual heating requirements of each room must be assessed individually.
HOT STUDIO facilities generally require higher installed heating capacity than conventional residential or office spaces because they must reach and maintain elevated operating temperatures.
Insufficient installed heating capacity can increase warm-up times and make it more difficult to maintain the required temperature, particularly during colder months.
For this reason, selecting a heating system should involve more than comparing initial equipment costs. Its ability to achieve the intended operating conditions is equally important.
2. Smart Heating Zones for More Even Heat Distribution
In larger HOT STUDIO facilities, dividing the heating system into several independently controlled zones is recommended.
For example:
Areas near windows and external walls
Areas close to entrance doors
The central part of the studio
Additional zones based on the room layout
Heat losses may vary across different parts of the room.
If one area reaches the target temperature sooner, heating in that zone can be reduced or switched off while panels in other zones continue operating.
Properly designed heating zones help achieve more even heat distribution and more precise temperature control.
3. Smart Control — Intelligent Heating Automation
A professional HOT STUDIO heating system should operate automatically, without requiring staff to switch infrared panels on and off throughout the day.
SUNDIRECT Smart 2.0 Pro control solutions allow heating operation to be managed according to room temperature and class schedules.
Before the class
Heating can be activated in advance using a programmed schedule or remote control via an app. This allows the studio to reach the required conditions before participants arrive.
During the class
Thermostats monitor room temperature and automatically control the heating zones.
As the internal heat load increases, the infrared panels switch off when the set temperature is reached and switch back on when additional heating is required.
Between classes and outside operating hours
Temperature settings can be reduced according to the studio's schedule, helping to avoid unnecessary electricity consumption.
Intelligent heating control helps maintain stable temperatures, optimise system operation and reduce the need for manual adjustments by staff.
Heating and Ventilation Must Work Together
Fresh air is just as important as heating in a HOT STUDIO.
During exercise, participants generate heat, moisture and CO₂. Without sufficient ventilation, CO₂ concentrations may rise and indoor air quality may deteriorate.
At the same time, excessive outdoor air supply without appropriate heat recovery can significantly increase heating energy consumption.
For this reason, heating and ventilation systems should be designed to operate together.
Heat Recovery Ventilation
A ventilation system equipped with heat recovery can transfer part of the heat from outgoing air to incoming fresh air.
This helps reduce energy losses and heating costs.
CO₂ Sensors
CO₂ sensors can help adjust ventilation rates according to the actual occupancy of the studio.
As the number of participants and CO₂ concentration increase, a demand-controlled ventilation system can automatically increase the fresh air supply.
The minimum ventilation rate specified in the design must still be maintained.
Humidity Control
Relative humidity also influences the HOT STUDIO environment. Moisture generated during classes should therefore be considered when designing the heating and ventilation systems.
Certain HOT YOGA concepts may require dedicated humidity control equipment.
Infrared heating provides radiant warmth, while ventilation ensures air exchange. Coordinating these systems is essential for maintaining a stable and comfortable HOT STUDIO environment.
Comfort for Instructors and Members
In a well-designed HOT STUDIO, heating, ventilation and automation operate as an integrated system.
This approach helps to:
Maintain stable temperatures throughout each class
Achieve more even heat distribution
Provide an adequate supply of fresh air
Reduce temperature fluctuations
Optimise electricity consumption
Create a premium training experience
For members, this means a more comfortable training environment. For instructors, it provides more predictable working conditions. For fitness club operators, it offers a heating system that is easier to manage efficiently.
These details contribute to a positive member experience and encourage participants to return for future classes.
Conclusion
Maintaining a stable temperature in a HOT STUDIO with dozens of people exercising simultaneously is an engineering challenge.
It requires correctly calculated heating capacity, carefully planned infrared panel placement, independently controlled heating zones, intelligent automation and professionally designed ventilation.
Together, these elements help create an environment where members experience consistent warmth, fresh air and comfort throughout their classes.
The benefits extend to everyone involved: members enjoy a better training experience, instructors can focus on teaching, and fitness clubs can strengthen their professional reputation.
SUNDIRECT Experience in HOT STUDIO Projects
SUNDIRECT infrared heating solutions have been installed in MyFitness HOT STUDIO facilities at Galerija Centrs and Galleria Riga in Riga, Latvia.
Both projects feature ceiling-mounted infrared heating panels with multi-zone temperature control, allowing heating operation to be adapted to the specific requirements of each studio.
Planning a HOT STUDIO?
SUNDIRECT Latvia specialises in professional infrared heating solutions for HOT STUDIO projects.
We support fitness clubs, developers and technical specialists with heating capacity calculations, infrared panel selection and positioning, heating zone planning and intelligent control solutions.
We also provide equipment supply and technical support to help ensure that the heating system meets the requirements of each project and is properly coordinated with the ventilation design.
Real Projects. Proven Technology. Professional Solutions.
