You’ve probably seen “IP44” or “IP65” on the spec sheet of a fan, a fan heater, or another small appliance without knowing exactly what it means in practice. It’s far from a minor detail: it tells you whether you can install that appliance in a bathroom, near a water source, or whether you risk seriously damaging it (or worse, creating an electrical hazard).

What the IP protection rating is

IP stands for Ingress Protection, an international standard indicating how well an electrical enclosure is protected against solid objects (dust, debris) and liquids (water) getting in. The code is always followed by two digits, e.g. IP44: the first digit covers solids, the second covers liquids.

How to read the first digit (solids)

The first digit ranges from 0 to 6 and indicates protection against solid objects and dust:

  • 0 — no protection
  • 1-2 — protection against large objects (fingers, hands)
  • 3-4 — protection against tools and thin wires
  • 5 — dust protection, with limited ingress that doesn’t affect operation
  • 6 — total dust protection

How to read the second digit (liquids)

The second digit ranges from 0 to 9 and indicates water protection, with increasing severity levels:

  • 0 — no protection
  • 1 — protection from vertically falling drops
  • 2 — protection from drops at up to 15° tilt
  • 3 — protection from spraying water up to 60° from vertical
  • 4 — protection from splashing water from any direction
  • 5 — protection from low-pressure water jets
  • 6 — protection from powerful water jets
  • 7 — protection from temporary immersion (up to 1 meter)
  • 8-9 — protection from prolonged immersion or high-pressure/high-temperature jets

The most common ratings on appliances

  • IP20 — the typical rating for many “living room” fans and fan heaters: basic solids protection, none against water. Fine in dry environments, never near a water source.
  • IP44 — the minimum recommended threshold for appliances installed in bathrooms or other humid environments, such as wall-mounted bathroom fan heaters: protects against splashes from any direction.
  • IP65 — full protection against dust and water jets, typical of some outdoor or garage appliances.

Why it matters when you buy

If you’re choosing a fan heater or a fan to install in a bathroom, an unenclosed veranda, or any environment with significant humidity, always check the IP rating before buying: an appliance with insufficient protection in a humid environment isn’t just less effective — it’s a genuine electrical safety risk. For a dry bedroom or living room, on the other hand, the IP rating isn’t a decisive factor: almost any standard model (often IP20 or unspecified) works fine.

In summary

The IP code tells you how well an appliance resists dust (first digit) and water (second digit). For dry rooms like a bedroom or living room, you don’t need to worry about it; for bathrooms, showers, or outdoor use, always look for at least IP44, and check the spec sheet before installing any electrical appliance near a water source.