Understanding IP Ratings: What They Mean for Ventilation Fans
When choosing ventilation fans for your projects or customers, you may have come across “IP ratings” in the product specifications. But what do those numbers actually mean? And why are they important when selecting the right fan for the job?
In this blog post, we’ll break down what IP ratings are, how to read them, and how they apply specifically to the fans we sell at Fresh Air Supplies.
What Is an IP Rating?
IP stands for Ingress Protection. It’s an international standard (IEC 60529) that classifies the degree of protection provided by an electrical enclosure against the intrusion of solid objects, dust, and water.
You’ll see IP ratings written as IPXX, where the first digit relates to solid object protection and the second digit to liquid (water) protection.
???? How to Read an IP Rating
An IP (Ingress Protection) rating tells you how well something is protected against solid objects (like dust or tools) and liquids (like water).
It’s written as IP followed by two digits:
➡️ First digit = Protection against solids
➡️ Second digit = Protection against liquids
???? First Digit – Solid Object & Dust Protection
| Digit | Level | Description |
|---|---|---|
| 0 | None | No protection against contact or objects |
| 1 | >50 mm | Protected from large surfaces (e.g. back of hand) |
| 2 | >12.5 mm | Protected from fingers or similar objects |
| 3 | >2.5 mm | Protected from tools and thick wires |
| 4 | >1 mm | Protected from most wires and small tools |
| 5 | Dust Protected | Limited dust allowed; no harmful interference |
| 6 | Dust Tight | Completely sealed against dust |
???? Second Digit – Water Protection
| Digit | Level | Description |
|---|---|---|
| 0 | None | No protection against water |
| 1 | Dripping Water | Protected from vertical drops |
| 2 | Dripping (Tilted) | Protected when tilted up to 15° |
| 3 | Spraying Water | Protected from spray at up to 60° angle |
| 4 | Splashing Water | Protected from water splashes from any direction |
| 5 | Water Jets | Protected against low-pressure jets (all angles) |
| 6 | Powerful Water Jets | Protected from high-pressure water jets |
| 7 | Temporary Immersion | Can withstand temporary submersion (up to 1m) |
| 8 | Continuous Immersion | Can withstand long periods of submersion (over 1m) |
✅ Example: IP65
-
6 = Dust tight (no dust entry)
-
5 = Protected against water jets
Why IP Ratings Matter for Ventilation Fans
Ventilation fans are often installed in challenging environments — bathrooms, kitchens, factories, outdoors — where exposure to moisture, dust, or debris is likely. Using a fan with the right IP rating ensures reliability, safety, and compliance with local building codes.
Common Examples:
-
Bathroom extractor fans: Should be at least IP44, offering protection from splashing water.
-
Outdoor fans or exposed locations: Often require IP65 or higher to withstand dust and water jets from rain or cleaning.
-
Industrial/warehouse fans: Depending on the application, IP54 or IP55 is typically required to prevent dust build-up and moisture damage.
-
Commercial kitchen fans: Need solid protection against both steam and grease – typically IP55.
Choosing the Right IP Rating
Here are a few questions to help decide:
-
Is the fan exposed to water (rain, steam, splashing)?
-
Is the area dusty or greasy (e.g., workshops, kitchens)?
-
Is the fan indoors, semi-outdoor, or fully outdoor?
If you’re unsure, it’s safer to choose a higher IP rating. It’s a bit more investment upfront but can prevent costly replacements or damage later.
Final Thoughts
Understanding IP ratings helps you make smarter choices when selecting ventilation fans. Whether you’re a contractor, wholesaler, or facilities manager, knowing how to read “IP55” or “IP44” gives you confidence in matching the right fan to the job.
At Fresh Air Supplies, we stock a wide range of fans with various IP ratings suitable for residential, commercial, and industrial environments. Need help choosing the right model? Get in touch — we’re here to help.