You might have experienced many times that your cold room or walk in freezers have a very high humidity. This is especially applicable for medicine cold rooms of 2-8°C, cold room used for fruits or vegetables etc. below 10°C etc. The problem is severe for a cold storage operating between 0°C to 15°C.
Humidity is basically moisture particles in the air. If you have a high concentration of moisture particles in the air, this means that the room is having a high humidity. Humidity is measured as a percentage of moisture particles in the air.
The cold room is always at a much lower temperature compared to its immediate. The air in any environment has a certain amount of moisture at all times. Even if you are in a dry country, you will have a humidity level of 30-40% RH.
Let us assume that you have a cold room of 2-8°C, which opens to a warehouse having a humidity level of 50%RH. The warehouse may be at a temperature of 25 to 30°C. There will be a certain level of moisture in the warehouse. When you open the doors of a cold room, it attracts fresh air from the warehouse. Since the cold room has a lower temperature, the moisture in the air condenses inside the cold room, thus increasing the humidity. Every time you open the cold room, it attracts more moisture particles into the cold room. This process is called condensation.
If you have a cold room humidity monitoring system inside your cold room, you can see that as soon as you open the door, humidity increases within seconds.
Thus the humidity keeps on increasing and will reach even 95-100% RH.
Fro storage of medicines, the recommended humidity level is below 65%. However, this also depends on the type of medicines that you are storing. If you are unsure, please check with the manufacturer of the medicine. We have undertaken dehumidification projects of cold rooms, which required a humidity level of 45%.
One way to reduce the humidity of a cold room is to limit air flow into the cold room from the outside. However, as you can imagine this is very difficult. You can install air curtain in front of the doors of the cold room, but is not very effective.
The next way is to remove humidity from the room by using a dehumidifier. This is the only way to effectively reduce the humidity of a cold room. Dehumidifiers are electrical devices which process the air and convert the moisture particles into water and remove from the room. Below 10°c, you have to use a desiccant type dehumidifier.
You need to calculate based on your room size, present temperature and present humidity. We will assist you to decide the exact capacity of the dehumidifier. If you wish, you can use our free dehumidifier calculation tool and read more on cold room dehumidifiers.
Visit us at vackerglobal.com to find out about our services.
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Good day,
We are in refrigeration industry for several decades and are always open to new partnerships where we can get specialized solutions and technical back up for our customers.
Currently we have a customer who has an existing cold room:
• Dimensions: L3000mm x W3000mm x H2400mm
• Temperature +2/+4 oC
He wants to renew his old cold room equipment and use the room for dual purpose (either/or at any one time depending on season):
• For storage of onions humidity 55-60%
• For storage of fresh meat humidity 80-90%
Grateful if you could let us have a solution with technical info, pricing and delivery.
Thank you
Best regards,
Mahendra Dausoa
Novengi Ltd
Mauritius
Our representative will get in touch with you
Help with sizeing dehumidifier
You can send your query to our email given at the top of the website and our office will help you.
Do you know if what is the standard realative humidity of cold storage that stores cakes, muffins, and other desserts?
Our representative will get in touch with you. Please send your inquiries to sales.en@vackerglobal.com or give us a call at +971 42661144.
I've got a cold room at 5 degree c. I want to reduce humidity to 50÷
One of our sales engineers will contact you. We require size of the room and present humidity levels to carry out exact calculation.
how do you control the humidity in a ageing meat walking cooler.
how do you control the humidity in a ageing walking cooler
Now I understand that when purchasing a cool room, a humidifier is also recommended. This is very helpful since my dad was planning to go into the pharmacy industry and he's wondering what equipment he might have to get. I wonder what the benefits of cold rooms for this industry are.
Please send us an enquiry with complete details through our contact us form.