What to Know About Commercial Fridge and Ice Machine Sound Levels

In the energetic environment of a commercial kitchen, the constant hum, whir, and clatter of equipment is part of the daily symphony. Among the most persistent contributors to this soundscape are commercial refrigerators and ice machines.

While some level of noise is an unavoidable byproduct of their powerful cooling mechanisms, excessive or unusual sounds can be more than just a minor annoyance. They can impact employee well-being, disrupt the customer experience, and even signal underlying mechanical problems.

Understanding the nuances of commercial refrigeration sound levels is crucial for any food service operator, from a small café owner to the manager of a large-scale institutional kitchen.

Let’s get into everything you need to know about the sounds your fridge and ice machine make, from typical decibel ratings to troubleshooting and noise reduction strategies.

Understanding Decibel Levels in a Commercial Setting

The loudness of a sound is measured in decibels (dB). For context, a quiet library typically registers around 40 dB, a normal conversation is about 60 dB, and a busy street can reach 80 dB or more.

Most standard commercial refrigerators operate in the 40–50 dB range, which is generally considered unobtrusive in a busy kitchen. However, older, larger, or poorly maintained units can easily exceed 70 dB, a level that can start to interfere with communication and create a more stressful work environment.

Ice machines, due to the nature of their operation—water filling, freezing, and dropping into a bin—tend to be louder than refrigerators. Their noise levels can vary significantly, from a relatively quiet 50 dB for smaller, under-counter models to over 70 dB for large, industrial units. The sound of ice dropping can be particularly jarring, so the placement and insulation of these machines are critical considerations.

In Canada, while there are no specific federal regulations governing the noise output of commercial kitchen equipment, provincial and territorial occupational health and safety regulations do set limits for workplace noise exposure. For example, in many jurisdictions, the maximum permissible noise exposure for an eight-hour workday is 85 dBA. While a single refrigerator is unlikely to reach this level on its own, the cumulative noise of multiple appliances in a confined space can contribute to an overall sound level that is both unpleasant and potentially harmful over time.

“What’s That Noise?” Common Sounds and Their Meanings

Not all sounds emanating from your commercial refrigeration are cause for alarm. Understanding the difference between normal operational noises and sounds that indicate a problem can save you time, money, and unnecessary stress.

Normal Noises

• Humming or buzzing. This is the most common sound you’ll hear from a refrigerator and is typically the sound of the compressor running. As long as the hum is steady and consistent, it’s a good sign that your unit is functioning correctly.

• Clicking. A clicking sound is often heard when the compressor cycles on or off. This is a normal part of the refrigeration cycle.

• Gurgling or bubbling. This sound is caused by the movement of refrigerant through the cooling lines. It’s a normal and harmless part of the cooling process.

• Cracking or popping. As the internal temperature of the refrigerator fluctuates, the plastic and metal components can expand and contract, resulting in popping or cracking sounds.

• Whirring. The whirring sound you hear is likely the evaporator or condenser fan, which circulates air to maintain a consistent temperature.

Problematic Noises

• Loud, persistent humming. If the humming of the compressor becomes noticeably louder or is continuous, it could indicate a problem with the compressor motor or low refrigerant levels.

• Grinding or squealing. These sounds often point to a faulty or worn-out fan motor. The bearings in the evaporator or condenser fan motor can wear down over time, resulting in a high-pitched grinding or squealing.

• Rattling. A rattling sound can be as simple as a loose panel or a component that needs tightening. However, it can also indicate a more serious issue, such as a loose fan blade or a problem with the compressor.

• Hissing. A hissing sound is a strong indicator of a refrigerant leak. This is a serious issue that requires immediate attention from a qualified technician, as low refrigerant levels can cause the compressor to overwork and fail.

• Knocking or banging. A loud knocking or banging sound from the compressor is a sign of a significant internal problem and should be addressed immediately to prevent catastrophic failure.

Factors Influencing Commercial Fridge and Ice Machine Noise

Several factors can contribute to the noise output of your refrigeration equipment:

• Age and condition. As with any mechanical equipment, older units are more likely to be noisy due to wear and tear on their components. Regular maintenance can help to mitigate this, but eventually, parts will need to be replaced.

• Compressor type. The type of compressor in your refrigerator or ice machine can have a significant impact on its noise level. Air-cooled compressors, which are common in many commercial units, tend to be louder than water-cooled or remote condenser units.

• Size and capacity. Larger refrigerators and ice machines with higher production capacities have larger components and more powerful motors, which naturally generate more noise.

• Installation and placement. The way your equipment is installed can have a surprising effect on how noisy it is. A unit that is not level can vibrate excessively, and placing it in a corner or against a wall can amplify the sound.

• Ventilation. Proper airflow is essential for the efficient operation of your refrigeration. If the vents are blocked, the unit will have to work harder to maintain its temperature, leading to increased noise and energy consumption.

Quiet on the Line: Strategies for Reducing Noise

If the noise from your commercial fridge or ice machine is becoming a problem, there are several steps you can take to quiet things down:

• Regular maintenance. The single most effective way to keep your refrigeration running quietly is to follow a regular maintenance schedule. This includes cleaning the condenser coils, checking and tightening loose components, and ensuring the fan motors are in good working order.

• Strategic placement. When installing new equipment, think carefully about its placement. Avoid putting noisy units in areas where they will disturb customers or staff. If possible, place them on a periphery wall or in a separate, well-ventilated room. For existing equipment, consider moving it to a less central location.

• Sound-absorbing materials. Placing rubber mats or anti-vibration pads under your refrigerator or ice machine can help to absorb vibrations and reduce noise. You can also install acoustic panels on the walls around the unit to dampen the sound.

• Proper levelling. Ensure that your refrigerator is perfectly level. An uneven unit can cause the internal components to vibrate and create a racket.

• Choose a quiet model. When it’s time to invest in new equipment, do your research and look for models that are specifically designed for quiet operation. Many manufacturers now offer “quiet” or “silent” models that utilize advanced technologies to minimize noise. When you’re in the market for new commercial fridges in Canada, be sure to inquire about the decibel ratings of the models you’re considering.

Pro tip. For expert guidance on choosing the right commercial fridge for your needs, our team can provide invaluable assistance.

The sound of your commercial refrigeration is a key indicator of the health and efficiency of your equipment. Now that you understand the different types of sounds your fridge and ice machine make, you can be proactive about maintenance and address potential problems before they escalate. And when it comes to creating a more pleasant and productive work environment, a little peace and quiet can go a long way!

For all your commercial refrigeration needs, from selecting a new, quieter model to getting advice on maintenance and troubleshooting, don’t hesitate to contact our experts at Canadian Commercial Appliance at 1-800-393-0120.