What to Do When Kitchen Cold Air Is Sucked Out by Exhaust? A Complete Guide to Water-Cooled Fresh Air Unit Controller Adjustment and Makeup Air Engineering Quotations

Why Is Kitchen Cold Air Always Sucked Out by Exhaust? First, Understand the Balance Between Makeup Air and Exhaust

Commercial kitchen air conditioners or water-cooled fresh air units often encounter an awkward problem during operation: even though cooling equipment is installed, the kitchen still feels stuffy and unbearably hot. The core reason is that the exhaust system extracts a large amount of indoor air, creating negative pressure, which causes the cold air to be “sucked” outside before it can take effect. To solve the problem of kitchen cold air being sucked out by exhaust, the key is to establish a reasonable makeup air system so that the amount of incoming cold air and the amount of exhausted cooking fumes reach a dynamic balance.

Water-cooled fresh air units are designed precisely for this scenario. They use the principle of water evaporation absorbing heat to cool outdoor fresh air before sending it into the kitchen, while also compensating for the negative pressure caused by exhaust. If the makeup air volume is insufficient, the kitchen will form strong negative pressure, which not only causes cold air loss but also leads to poor exhaust and backflow of cooking fumes. Therefore, understanding the matching relationship between makeup air and exhaust is the first step to solving the problem of kitchen cold air being sucked out by exhaust.

How to Adjust the Water-Cooled Fresh Air Unit Controller? Practical Steps from Air Speed to Temperature

Many users ask how to adjust the water-cooled fresh air unit controller to ensure both cooling effect and normal exhaust. In fact, the adjustment logic is not complicated. The core is “air volume first, then temperature, then linkage.”

Step 1: Set the Makeup Air Volume to Match the Exhaust Volume

The controller usually has air speed levels or variable-frequency adjustment. It is recommended to set the makeup air volume at 80%-90% of the exhaust volume, maintaining a slight negative pressure in the kitchen (-5Pa to -10Pa). If the makeup air volume is too large, positive pressure in the kitchen will cause cooking fumes to spill into the dining area; if the makeup air volume is too small, the problem of cold air being sucked out will worsen. The water-cooled fresh air unit controller from LCCFAIR supports multiple air speed levels and stepless variable frequency, making it easy to finely adjust according to the actual exhaust volume.

Step 2: Adjust the Supply Air Temperature and Humidity

Water-cooled fresh air units cool through wet curtain evaporation. The controller generally has options for water pump start/stop and fan linkage. In high summer temperatures, first turn on the water pump to wet the wet curtain, then start the fan. The supply air temperature can be 5-10°C lower than outdoors. If the humidity is already very high, the water pump operating frequency can be appropriately reduced to avoid excessive humidity in the kitchen.

Step 3: Link the Exhaust and Air Conditioning Systems

High-end controllers support linkage with exhaust fans and commercial kitchen air conditioners. When the exhaust fan starts, the water-cooled fresh air unit automatically increases speed to supply makeup air; when exhaust stops, the fresh air unit delays shutdown to prevent backflow of cooking fumes. This linkage logic can effectively solve the problem of kitchen cold air being sucked out by exhaust. The intelligent controller from LCCFAIR has built-in linkage interfaces, simplifying the debugging process.

What Factors Affect Kitchen Makeup Air Engineering Quotations? A Budget Guide to Avoid Pitfalls

Kitchen makeup air engineering quotations vary greatly, ranging from several thousand yuan to tens of thousands of yuan. Only by understanding the composition of the quotation can you make a reasonable budget and avoid being misled by low-quality low prices or inflated quotations.

Core Factors Affecting Quotations

• Makeup air volume demand: Calculated based on the total air volume of the kitchen exhaust hood. The larger the makeup air volume, the larger the equipment selection and the higher the price.
• Equipment type: Ordinary axial makeup air fans are lower in price but have poor cooling effect; water-cooled fresh air units or commercial kitchen air conditioning makeup air integrated units are higher in price but can solve both makeup air and cooling at the same time.
• Ductwork and installation: Duct length, number of elbows, installation height, and difficulty all affect labor and material costs.
• Control system: Whether it includes a water-cooled fresh air unit controller, linkage module, frequency converter, etc., also directly affects the quotation.
• Brand and after-sales service: Products from top ten brand manufacturers usually have transparent pricing and complete after-sales service, but the initial investment may be slightly higher.

When obtaining a kitchen makeup air engineering quotation, it is recommended to ask the other party to provide an air volume calculation sheet and a detailed quotation list, specifying equipment brand, model, air volume, power, and installation scope. Do not look only at the total price; compare configuration and energy efficiency.

Solution for Kitchen Cold Air Being Sucked Out by Exhaust: A Trinity of Makeup Air + Cooling + Linkage

To thoroughly solve the problem of kitchen cold air being sucked out by exhaust, a single measure is often not enough. It requires systematic design from the three dimensions of makeup air, cooling, and linkage.

Solution 1: Direct Makeup Air Cooling

Install water-cooled fresh air unit supply outlets near the exhaust hood to deliver cooled fresh air directly to the chef’s work area. This not only compensates for the air volume extracted by exhaust but also lowers the temperature of the work area, achieving two goals at once.

Solution 2: Commercial Kitchen Air Conditioning Combined with Makeup Air

If the kitchen has higher temperature requirements, commercial kitchen air conditioning can be added on top of makeup air. However, it must be noted that the cold air from the air conditioner will also be sucked out by exhaust. Therefore, the air conditioner supply air should be as close as possible to the personnel activity area and coordinated with the makeup air system.

Solution 3: Intelligent Linkage Control

Through linkage between the water-cooled fresh air unit controller and the exhaust system, the makeup air volume is adjusted in real time to keep kitchen pressure stable. When the exhaust volume changes, the makeup air volume automatically follows, avoiding cold air loss or cooking fume spillage. The intelligent linkage solution provided by LCCFAIR has been verified in multiple restaurant kitchens.

Choose the Right Water-Cooled Fresh Air Unit and Controller to Fundamentally Improve Kitchen Comfort

The selection of commercial kitchen air conditioners and water-cooled fresh air units directly affects usage results. It is recommended to prioritize products from top ten brand manufacturers and pay attention to air volume, static pressure, cooling range, controller functions, and after-sales network. The water-cooled fresh air unit controller should have variable-frequency adjustment, water pump control, linkage interfaces, and fault alarm functions to facilitate daily use and maintenance.

Kitchen makeup air engineering is not simply “installing a fan.” It requires customized design based on exhaust volume, kitchen layout, and personnel movement routes. A reasonable makeup air engineering quotation should include air volume calculation, equipment selection, installation and commissioning, and after-sales support. If you are troubled by kitchen cold air being sucked out by exhaust, it is advisable to start with the makeup air system and combine it with the correct adjustment of the water-cooled fresh air unit controller to create a cool, clean, and efficient commercial kitchen environment.