Understanding Commercial Cooler Humidity is key to ensure optimum performance

Understanding Commercial Cooler Humidity: A Comprehensive Guide

Posted by | 10-12-2023

Maintaining the correct humidity level in commercial coolers is crucial for preserving the quality of stored products. Whether it's food, pharmaceuticals, or other sensitive items, understanding how to manage humidity effectively can mean the difference between preservation and spoilage. This guide delves into the intricacies of understanding commercial cooler humidity, offering insights into optimal storage conditions.

A display fridge in a commercial store

Basic Concepts of Humidity

Humidity refers to the amount of water vapor present in the air. Two key measurements are used: relative humidity (the percentage of moisture in the air compared to what it can hold at that temperature) and absolute humidity (the actual amount of moisture in the air). Understanding these concepts is essential for managing commercial cooler environments.

Humidity refers to the presence of water vapor in the air. It's a crucial factor in refrigeration because it affects both the temperature and the quality of stored products. There are two key types of humidity measurements:

  • Relative Humidity (RH): This measures the amount of moisture in the air relative to the maximum amount it can hold at a given temperature, expressed as a percentage. For example, an RH of 60% means the air holds 60% of the water vapor it can at that temperature.
  • Absolute Humidity: This is the amount of water vapor present in the air, regardless of temperature, usually measured in grams per cubic meter of air.

Importance of Humidity Control in Commercial Coolers

Improper humidity levels in commercial coolers can lead to various problems. Excessive moisture may cause mold growth and spoilage, while too little humidity can dry out products. The interplay between temperature and humidity is also crucial; as temperature decreases, the air holds less moisture, potentially leading to dryer conditions.

Food Preservation

Proper humidity control is key to preserving the freshness and quality of food. Certain foods, especially fresh produce, require specific humidity levels to maintain their texture, taste, and nutritional value. When humidity is too low, produce can lose moisture, leading to wilting and shrinkage. Conversely, high humidity can create a breeding ground for mold and bacteria, causing spoilage.

Balanced humidity levels in commercial coolers can significantly extend the shelf life of food products. By slowing down the degradation process, businesses can reduce waste, lower costs, and provide fresher products to customers.

Preventing Freezer Burn

Freezer burn occurs when food loses moisture and becomes dehydrated, often resulting in a change in texture and taste. It is a common issue in frozen storage, particularly when humidity is not adequately controlled.

To prevent freezer burn, maintaining consistent and appropriate humidity levels in coolers is essential. This involves using well-designed refrigeration systems and regular monitoring to ensure that the environment within the cooler remains stable and suitable for frozen products.

Energy Efficiency

Humidity control in commercial coolers isn't just about preserving food; it also significantly impacts energy efficiency. When humidity levels are properly managed, refrigeration systems do not have to work as hard to maintain the desired temperature, reducing energy consumption and cost savings.

Finding the balance between the right temperature and humidity settings can optimize the energy efficiency of commercial coolers. This involves regular maintenance checks and using smart refrigeration technologies that automatically adjust settings for optimal performance.

Mitigating Health Risks

Humidity control in commercial coolers is not just about maintaining the quality of products; it also significantly reduces health risks. High humidity levels can encourage the growth of harmful bacteria and mold, leading to foodborne illnesses. By maintaining optimal humidity, the risk of contamination and the spread of diseases through food products can be significantly minimized.

Proper humidity management ensures that businesses comply with food safety regulations and standards. Regular humidity control helps maintain an environment that discourages the growth of pathogens, aligns with health guidelines, and protects businesses from potential legal and reputation risks.

Enhancing Product Variety and Storage Conditions

Different products require different humidity levels for optimal preservation. Effective humidity control allows commercial coolers to store various products under ideal conditions, from delicate fruits and vegetables to robust dairy and meat products.

Advanced humidity control systems enable businesses to customize storage environments for specific product needs. This flexibility is crucial for businesses that cater to a wide range of products, ensuring that each item is stored in conditions that maintain its freshness and extend its shelf life.

A customer checking a frozen food from the cooler in a store

Types of Commercial Coolers and Their Humidity Control Mechanisms

Commercial coolers vary, including walk-in coolers and reach-in models. Each uses different technologies for humidity control. Some rely on advanced refrigeration systems that automatically adjust humidity, while others may use separate humidifiers or dehumidifiers to maintain the desired levels.


Floral coolers are designed to keep flowers fresh and extend their lifespan. These coolers typically maintain higher humidity than standard refrigeration units, as flowers require a moist environment to stay vibrant and avoid wilting.

Many floral coolers come equipped with sophisticated humidity control systems that can be adjusted according to the type of flowers being stored. This flexibility is crucial for florists with a wide range of floral varieties, each with unique humidity needs.

Floral coolers maintain over 90% humidity at 35-45°F, with gentle airflow, which prevents flowers from drying out and ensures their freshness.


Fresh fish and meat cases are designed to maintain lower humidity levels to prevent bacteria growth and preserve the products' freshness. These cases often use refrigeration systems that remove excess moisture from the air.

These coolers typically feature advanced cooling systems that circulate cold air evenly, ensuring that all parts of the meat or fish are kept at the optimal temperature and humidity level. This circulation also helps to remove any odorous air, keeping the environment fresh.

Meat and fish are best preserved at 85%-90% humidity at 35°F, which helps reduce weight loss through surface evaporation.


Beverage coolers are designed to keep drinks at the perfect temperature without altering their quality. Humidity control in these coolers is less about moisture levels and more about maintaining a consistent temperature to prevent condensation that can affect labels or packaging.

These coolers usually have efficient designs that balance humidity and temperature, ensuring that beverages are kept in an ideal environment for both short-term and long-term storage.

Maintaining 55%-75% humidity at 35°F-45°F is essential for beer coolers, especially those with corks, to prevent drying or mold growth.


Glass door display coolers not only provide an aesthetic display of products but also require effective humidity control to prevent fogging of the glass doors. This clarity is essential for customer visibility and product appeal.

Many of these coolers come equipped with anti-condensation technologies that maintain the right balance of humidity and temperature, ensuring the glass stays clear. At the same time, the products remain at their ideal storage conditions.

For produce, 60%-75% humidity at 55°F is key to preventing water loss, ensuring the produce remains fresh and appealing to customers.


Undercounter coolers are designed for space efficiency and are often used in bars and small kitchens. Despite their compact size, these coolers must effectively control humidity to preserve the quality of stored items, whether food or beverages.

These units often come with advanced ventilation systems that help maintain the right humidity levels, even in tight spaces where air circulation can be challenging.

Understanding Commercial Cooler Humidity is key to ensure optimum performance

Best Practices for Managing Humidity in Commercial Coolers

Maintaining optimal humidity in commercial coolers is critical to ensuring product quality and longevity. Here are the essential tips for best practices in managing humidity aimed at helping businesses get the most out of their refrigeration units.

1. Regular Monitoring with Hygrometers

Install hygrometers to monitor the humidity levels inside the cooler constantly. This allows for real-time adjustments and ensures the environment remains within the desired humidity range.

2. Proper Sealing and Insulation

Regularly check and maintain the seals and insulation of the cooler. This prevents external air from affecting the internal environment, helping to maintain consistent humidity levels.

3. Temperature-Humidity Balance

Recognize the relationship between temperature and humidity. Adjustments in temperature often require corresponding adjustments in humidity levels to maintain an optimal environment.

4. Efficient Air Circulation

Ensure efficient air circulation within the cooler. Proper airflow helps evenly distribute humidity and temperature, preventing the formation of microclimates.

5. Use of Humidifiers and Dehumidifiers

Depending on the requirement, use humidifiers to add moisture or dehumidifiers to remove excess humidity from the air, maintaining the ideal humidity for your products.

6. Regular Maintenance of Cooling Systems

Regularly maintain the refrigeration system to ensure it functions efficiently, as any malfunction can lead to humidity fluctuations.

7. Product Placement Strategy

Arrange products that allow for uniform humidity distribution. Avoid overcrowding, which can lead to uneven humidity levels and potential spoilage.

8. Responding to External Climate Changes

Be aware of how external weather conditions can impact the internal environment and adjust the cooler settings accordingly to maintain stable humidity levels.

9. Educate Staff on Humidity Management

Train your staff on the importance of humidity control and how to manage it effectively. Educated employees can better identify and address humidity-related issues.

10. Using Smart Technology

Consider investing in smart refrigeration technologies that automatically adjust humidity levels based on real-time data, offering a more efficient and hassle-free approach to humidity management.

An organized display cooler in a store

How Can Ancaster Food Equipment Help?

Ancaster Food Equipment, with over 30 years of experience in the industry, is an expert in providing solutions for commercial cooler humidity challenges. We specialize in refurbished refrigeration products and offer an extensive range of equipment tailored for the US and Canadian markets. 

Whether selecting the right equipment with built-in humidity control features or offering advice on maintaining existing systems, our seasoned professionals are well-equipped to assist businesses in managing the critical aspect of humidity in commercial coolers, ensuring both product quality and operational efficiency.

Final Words: Understanding Commercial Cooler Humidity

Understanding and managing humidity in commercial coolers is vital for product preservation. Businesses can ensure product quality and longevity by comprehending the basics of humidity, recognizing its impact on products, and implementing best practices for control.

If you're looking for expert guidance or need assistance with refrigeration needs, don't hesitate to contact Ancaster Food Equipment. With our 30+ years of experience in the industry and a wide range of refurbished products tailored for the US and Canadian markets, we are well-equipped to help you navigate the complexities of commercial cooler humidity. Call us today at 1-855-680-4398 and take the first step towards optimal humidity management in your business.

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