Marquee cooling is a major logistical and technical challenge as soon as the summer season begins. Whether for a prestigious wedding, a trade fair, or a temporary storage space, the temperature under a "tent" type structure can rise dramatically due to solar radiation. Without a rigorous cooling strategy, the air quickly becomes saturated, creating a suffocating feeling for occupants. At Climatik, a leader in selling thermal solutions, we analyze the best technologies to transform your ephemeral spaces into cool havens, even during heatwaves.

Understanding the Thermodynamics of a Fabric Structure

Why is it so difficult to cool marquees? Unlike a concrete building, fabric (whether PVC or polyester) has almost zero thermal inertia.

The Greenhouse Effect and Stratification

As soon as UV rays hit the membrane, energy is transferred to the indoor air. Two phenomena are then observed:

• Heat accumulation: Heat is trapped by the upper wall.

• Stratification: The warmer, less dense air accumulates at the top of the marquee, while cool air remains on the ground. However, without air circulation, this layer of coolness is quickly swept away by external heat input.

Moreover, human presence generates a latent (humidity) and sensible (heat) thermal load. A group of 200 people produces approximately 25 kW of heat, equivalent to several large radiators switched on in the middle of summer!

Leading Solutions for Marquee Cooling

1. Direct Expansion Air Conditioning ("Active" Cooling)

This is the only solution capable of guaranteeing a precise setpoint temperature, regardless of the outdoor climate. Air conditioners are placed outdoors. Air is drawn in, cooled on an evaporator, then reinjected via ducts.

• Advantages: Air dehumidification, precise temperature control, silent indoors.

• Constraints: Requires a significant three-phase electrical supply and a higher budget.

2. Evaporative Cooling ("Bio-cooler")

Also known as adiabatic air coolers, this system is highly valued by Climatik clients for its eco-friendly aspect. The principle uses air energy to evaporate water, which causes the temperature of the blown air to drop.

• Why choose it: Electricity consumption is 10 times lower compared to air conditioning, can be used outdoors or with open marquee sides.

• Performance calculation: The drier the air, the more impressive the temperature drop (up to -12°C).

3. High-Performance Ventilation and Air Circulation

Sometimes, cooling does not involve producing cold, but rather increasing airflow. Large-diameter fans (HVLS) create an air current that facilitates the evaporation of perspiration on the skin, providing an immediate comfort sensation of 3 to 5°C.

Installation and Maintenance: The Keys to Optimal Coolness

Deploying a marquee cooling system is not limited to simply installing machines. To ensure a real temperature drop and optimal comfort, here are the essential points to master:

1. Strategic Positioning of Units

Unlike air conditioning, adiabatic cooling relies on a constant airflow.

• Fresh air intake: Units must imperatively be placed outdoors or near an opening. They draw in hot outdoor air to filter and cool it.
• Ground surface: Avoid placing machines on burning asphalt or in direct sunlight if possible. Drawing in air at 35°C rather than 45°C (ground temperature) significantly increases the system's efficiency.

2. Air Diffusion: Natural and Ductless

In the case of coolers, the use of ducts is inappropriate. These devices operate with powerful axial fans that poorly withstand the pressure exerted by ducting, which would drastically reduce their airflow.

• Direct diffusion: Air is pulsed directly through the device's louvers. The secret to good distribution lies in placing the units all around the marquee to create a "sweep" of cool air.
•  Air renewal: Unlike a closed air-conditioned space, a cooled marquee must remain open or ventilated to allow humidity to escape and avoid a "sauna" effect.

3. Regular Maintenance for Lasting Performance

A poorly maintained cooler loses efficiency and consumes more.

• Water management: This is the fuel for your coolness. For an uninterrupted event, opt for a permanent connection to the water supply. If using the manual tank, check levels every 4 to 6 hours during peak heat.
•  Cleanliness of media (Filters): In summer, pollen and dust quickly accumulate on the wet pads. A quick rinse of the filters maintains maximum airflow and impeccable hygiene.
•  Draining: At the end of the event, it is crucial to drain the water tank to prevent stagnation and bacterial growth.

Conclusion: Anticipate to Avoid the Heat

Marquee cooling is a profitable investment: it guarantees customer satisfaction, protects your electronic equipment, and ensures the success of your catering buffets. By combining insulation (liners), air circulation, and adapted cold production, you control your environment from A to Z.

At Climatik, we have the widest range of mobile cooling solutions. From high-pressure misting to industrial air conditioning, our advisors will assist you in defining the most efficient system according to your budget and energy constraints. Don't let the weather decide the success of your event!