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Thermo Fan IP Ratings Explained

Thermo Fan IP Ratings Explained

Fan IP Ratings

Thermo fans play a crucial role in various industries and applications, ensuring efficient heat dissipation and optimal performance of electronic devices. However, to ensure their reliability and longevity, it is essential to consider the IP (Ingress Protection) ratings of these fans.

IP ratings provide information about the fan's ability to withstand and protect against dust, moisture, and other environmental factors. Understanding the significance of IP ratings and their influence on thermo fan selection is vital for making informed decisions. In this article, we will delve into the world of thermo fan IP ratings, exploring their importance, different ratings available, and factors to consider when choosing the right IP rating for specific applications.

Importance of IP Ratings in Thermo Fans

Cooling fans are often exposed to harsh environments, like muddy racetracks or dusty construction sites. The IP rating helps you make sure your fan can handle it without choking on debris or getting fried by a splash of water.

IP ratings are not just for thermo fans however, they are important for all electrical devices that might face the elements. From your trusty smartphone to the fancy electronics in your car, IP ratings ensure they don't get damaged or malfunction when faced with water, dust, or other havoc-wreaking substances.

IP Rating gradations and their meanings

Let's break down these IP ratings. IP stands for Ingress Protection, which basically means how protected your fan is from any unwanted intruders.

The IP rating consists of two numbers, the first number in the IP rating indicates solid object protection, with higher numbers providing better defense against pesky dust. The second number deals with liquid protection, with higher numbers meaning better resistance to water and other liquids. So, when you see IP68 on that thermo fan box, you can rest easy knowing it's well-equipped to handle some dusty and wet situations.

Solid Object Protection Levels

Now that we know the first digit represents protection against dust, let's dive into what each level means.

Level 0: No protection against solid objects. Dust and small particles can easily find their way into your device.
Level 1: Protection against solid objects larger than 50mm. Don't worry, your device won't be invaded by any big chunks.
Level 2: Protection against solid objects larger than 12.5mm. It can fend off most fingers trying to dig into your device.
Level 3: Protection against solid objects larger than 2.5mm. Bye-bye, small tools and wires. Nothing's getting through.
Level 4: Protection against solid objects larger than 1mm. You can breathe a sigh of relief knowing even tiny screws won't penetrate your device.
Level 5: Protection against dust, with limited ingress allowed. You'll have to pull out the vacuum cleaner, but it won't be a catastrophic dust storm.
Level 6: Complete protection against dust. Your device is like an impenetrable fortress against airborne particles.

Liquid Ingress Protection Levels

Let's break down the second digit and what each level means for protection against liquids:

 Level 0: No protection against water. Any encounter with liquids will likely be disastrous for your device.
Level 1: Protection against vertically falling water droplets. You're safe from that leaky hose, but don't go dunking your device just yet.
Level 2: Protection against water droplets when tilted up to 15 degrees. You can handle a few accidental splashes, but don't go swimming with it.
Level 3: Protection against water spray at an angle of up to 60 degrees. Light rain won't stand a chance against your device.
Level 4: Protection against water splashes from all directions. You can confidently use your device in the pouring rain without worry.
Level 5: Protection against water jets from any direction. If you accidentally drop it in the pool, it's not the end of the world.
Level 6: Protection against powerful water jets and waves. You can take your device surfing without fear of water damage.
Level 7: Protection against temporary immersion in water up to 1 meter deep. Accidentally dropping it in the bathtub won't be a disaster.
Level 8: Protection against continuous immersion in water beyond 1 meter deep. Your device can survive a deep-sea diving expedition.
Level 9: Protection against high-pressure, high-temperature water jets. Your device is practically waterproof, no matter the conditions.


Higher IP ratings indicate a higher level of protection against external elements. For thermo fans, this means better protection against dust, moisture, and other potentially damaging substances. 

IP ratings and fan durability in challenging environments

By choosing a thermo fan with a higher IP rating, you can ensure optimal performance even in harsh conditions. Thermo fans often find themselves in demanding environments, such as industrial settings or muddy and dusty applications. These environments expose them to various challenges, including high temperatures, humidity, dust, and even potential contact with liquids.

By selecting a thermo fan with an appropriate IP rating for the specific environment, you can enhance its durability and prolong its lifespan. A higher IP rating means the fan is better protected against the ingress of dust and moisture, reducing the risk of damage and ensuring it can withstand the toughest conditions.

IP testing and certification for thermo fans

To determine and advertise an IP rating, thermo fans undergo testing according to standardized procedures. These tests evaluate the fan's resilience against solids and liquids in different scenarios.

During IP testing, the thermo fan is subjected to various conditions, such as dust chambers and water sprays, to assess its resistance. The fan's performance is evaluated based on its ability to prevent the ingress of solids and liquids, and a rating is assigned accordingly.

By understanding the testing procedures, you can be confident that the IP rating assigned to a thermo fan is based on rigorous evaluation and not just a marketing gimmick.

In conclusion...

Remember, IP ratings are not just numbers; they represent the level of protection your device will have against solid objects and liquids.


Barring one or two exclusions, the SPAL and Maradyne universal fans listed on the website all boast an IP68 rating, meaning the motors are totally sealed against dust and water ingress. This rating means you can have peace of mind knowing your cooling fan will withstand the elements and keep performing well in all conditions, and for a long long time.

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