Water-Cooled Fresh Air Unit Component Diagram + Open Kitchen Makeup Air Cooling: The Ultimate Solution to Poor Cooling Performance Caused by Kitchen Negative Pressure
1. Starting from a Water-Cooled Fresh Air Unit Component Image: Why Can It Save a High-Temperature Kitchen?
If you search online for water-cooled fresh air unit component images, you will find that it is far more complex than an ordinary fresh air unit. The core components include: a water-cooled heat exchange core, a centrifugal fan, a water distributor, a water collection pan, a water pump, a filter screen, and an intelligent control module. It is precisely this structure that allows the water-cooled fresh air unit to complete ventilation while cooling, rather than simply blowing hot outdoor air inside.
An ordinary fresh air unit can only introduce outdoor air. When the outdoor temperature is 35°C in summer, the air it supplies is also 35°C, and the kitchen remains stuffy and hot. A water-cooled fresh air unit, however, uses water evaporation to absorb heat and can reduce the supply air temperature to around 28°C, or even lower. This is why water-cooled fresh air units have gradually become a mainstream choice in the field of commercial kitchen air conditioning.
Taking the brand LCCFAIR 岚畅 as an example, its water-cooled fresh air unit uses a thickened design on the heat exchange core. Combined with a high-air-volume centrifugal fan, a single unit can cover a kitchen area of 30-50㎡. Once you understand the component diagram, you will realize: it is not an air conditioner, yet it is even better than one.
2. Open Kitchen Makeup Air Cooling: Why Is Your Air Conditioning Never Cold Enough?
In recent years, open kitchen makeup air cooling has become a hot topic in home renovation. An open kitchen is connected to the living room. In summer, even when the living room air conditioner is running at full power, the kitchen still feels like a steamer. The reason is simple: the kitchen range hood has an extremely large exhaust volume, usually 15-20m³/min, which is equivalent to extracting the air of an entire room every minute.
If the kitchen does not have independent makeup air, the air-conditioned cold air will be directly extracted by the range hood, forming a “cold air short circuit.” You feel cold in the living room and hot in the kitchen. In essence, this is a failure of airflow organization. The correct approach is to install a separate makeup air outlet in the kitchen area, and the makeup air must be cooled. Otherwise, the air brought in is hot outdoor air, which instead increases the burden on the air conditioner.
This is where the water-cooled fresh air unit comes into play. It is independent of the living room air conditioning system and specifically provides cooled fresh air to the kitchen. When the range hood starts, the water-cooled fresh air unit runs synchronously, sending cooled air into the kitchen to form slight positive pressure, preventing oil fumes from spilling out while replenishing the extracted air. In this way, the cold air from the living room air conditioner will not be “stolen.”
Engineers from the brand LCCFAIR 岚畅 point out that the best solution for open kitchen makeup air cooling is: a water-cooled fresh air unit + independent ducting, with the supply air outlet installed above the side of the stove, and the air speed controlled at 1.5-2.5m/s. This does not affect the stove flame and can also form an air curtain.
3. Solutions for Poor Kitchen Negative Pressure Cooling: Three Steps to Completely Solve “Exhausting Until All the Cold Air Is Gone”
Kitchen negative pressure is the main culprit behind poor cooling performance. The solution for poor kitchen negative pressure cooling actually has a standard process, requiring only three steps. Step one: measure the exhaust volume. Use an anemometer to measure the range hood exhaust outlet and calculate the total exhaust volume. Usually, a household range hood is 15m³/min, while commercial ones can reach as high as 40m³/min. Step two: calculate the makeup air volume. The makeup air volume should be 70%-80% of the exhaust volume, with the remaining 20%-30% naturally entering through door and window gaps to avoid excessive positive pressure. Step three: choose makeup air cooling equipment. Ordinary fans are ineffective for makeup air; a water-cooled fresh air unit or commercial kitchen air conditioner must be used.
Why 70%-80%? Because if the makeup air volume equals the exhaust volume, the kitchen will become positively pressurized, and oil fumes will instead leak into the living room through gaps. If the makeup air volume is too small, negative pressure remains, and cold air continues to be extracted. This ratio is an industry empirical value, and it has also been verified by LCCFAIR 岚畅 in a large number of commercial kitchen projects.
The specific solution: install an electric air valve on the supply air duct of the water-cooled fresh air unit and link it with the range hood. When the range hood starts, the air valve opens, and the water-cooled fresh air unit starts synchronously; when the range hood is turned off, the air valve closes. This saves energy and prevents the kitchen from becoming too cold. For open kitchens, an air curtain machine can also be installed at the boundary between the living room and the kitchen to form a second barrier.
4. Commercial Kitchen Air Conditioning + Water-Cooled Fresh Air Unit: How to Choose the Golden Combination?
Many people ask: between commercial kitchen air conditioning and water-cooled fresh air units, which one should be chosen? The answer is: it depends on the scenario. In a closed kitchen, the negative pressure problem is not serious, so commercial kitchen air conditioning can be used directly, but a makeup air outlet must be provided; otherwise, the air conditioning performance will be reduced. In an open kitchen, the negative pressure problem is prominent, so a water-cooled fresh air unit should be given priority because it handles both makeup air and cooling.
If the budget allows, the best solution is to combine the two: the water-cooled fresh air unit handles makeup air cooling, while the commercial kitchen air conditioner handles workstation cooling. For example, install a jet air conditioner in front of the stove chef to blow cold air directly onto the person, while the water-cooled fresh air unit handles overall ambient cooling. This solves both negative pressure and human comfort.
When selecting a model, pay attention to three parameters: air volume, cooling capacity, and external static pressure. Air volume is calculated according to kitchen volume and air changes, usually 20-30 air changes per hour. Cooling capacity is estimated at 150-250W per square meter. External static pressure must be sufficient to overcome duct resistance; otherwise, the supply air will be weak. In the water-cooled fresh air unit component image, the sizes of the fan and heat exchange core directly determine these three parameters, so be sure to compare them before purchasing.
Among the top ten brands, LCCFAIR 岚畅 is known for customized ducting and linkage control, making it especially suitable for open kitchens and commercial scenarios with severe negative pressure. The factory-direct sales model also reduces intermediate costs, making it suitable for small and medium-sized restaurant owners.
5. Common Misconceptions and Practical Recommendations
Misconception one: using an ordinary ventilation fan as makeup air. A ventilation fan only circulates indoor air, does not cool it, and does not increase oxygen content, so it is as good as not installing one. Misconception two: pointing the makeup air outlet at the stove. This will distort the flame, affect combustion efficiency, and even create safety hazards. The correct position is above the side of the stove or behind it, forming an air curtain.
Misconception three: installing only a range hood without makeup air. This is the fundamental reason for poor negative pressure cooling. The greater the range hood exhaust volume, the more severe the negative pressure, and the faster the cold air escapes. Practical recommendation: first measure the exhaust volume, then configure the water-cooled fresh air unit, and finally perform linkage debugging. During debugging, use an anemometer to measure the air speed at the makeup air outlet and a thermometer to measure the supply air temperature difference, ensuring a temperature drop of 5-10°C.
For an open kitchen that has already been renovated, if ducting cannot be routed through the ceiling, a wall-mounted water-cooled fresh air unit can be considered, with a hole opened directly in the exterior wall and the supply air duct routed along the wall corner. Although the appearance is slightly less attractive, the effect is immediate. Remember: the core of kitchen cooling is not how large the air conditioner is, but airflow balance.
6. Conclusion: Let the Kitchen Say Goodbye to the “Negative Pressure Steamer”
Poor kitchen negative pressure cooling is not because the air conditioner is not powerful enough, but because the airflow organization is wrong. By understanding the water-cooled fresh air unit component image, grasping the logic of open kitchen makeup air cooling, and mastering the solution for poor kitchen negative pressure cooling, you can use one water-cooled fresh air unit to revitalize the comfort of the entire kitchen. Commercial kitchen air conditioning and water-cooled fresh air units are not competitors, but complementary partners.
If you are troubled by high kitchen temperatures, oil fume spillage, and cold air that is not cool, you may want to start by measuring the exhaust volume and redesigning the makeup air solution. Choosing a manufacturer such as LCCFAIR 岚畅 that focuses on commercial kitchen air conditioning and water-cooled fresh air units can help you avoid detours. You are welcome to share your kitchen cooling challenges in the comments section, and we can explore solutions together.
