Preventing mould and condensation requires ventilation to continue until humidity levels return to normal. When a fan is operated manually, it may be switched off too early, leaving excess moisture in the room, or left running longer than necessary, wasting energy.

A humidity sensor automatically monitors the air and operates the fan only when needed. This helps maintain a healthier indoor environment while reducing unnecessary energy consumption.

Technically, it would be possible to equip the fans with Bluetooth, Wi-Fi, or remote-control functionality. However, we believe these features would increase the cost and complexity of the product without providing significant practical benefits.

In most installations, humidity and timer settings are adjusted only once during commissioning and rarely require further changes. Our focus is on reliability, simplicity, and long-term durability rather than adding features that are seldom used.

A certain level of noise is unavoidable when moving large volumes of air. Higher airflow naturally generates more sound. In addition, installation on an unstable surface may cause vibrations or resonance, making the fan seem louder than expected.
Some manufacturers advertise very low noise levels measured at reduced motor speeds. While lower speeds can decrease noise, they also reduce airflow performance. In theory, the quietest fan would be one that does not rotate at all—but it would not ventilate the room.
Our design philosophy is different: we aim to achieve the highest possible extraction performance while maintaining comfortable noise levels. By removing humid air more quickly and efficiently, the fan can complete its job sooner, reducing the overall operating time.

Ball bearings provide smooth operation, low friction, and long service life. They are designed to operate continuously for many years while maintaining low noise levels.

Some low-cost fans use sleeve bearings instead. Although less expensive, sleeve bearings generally wear faster, become noisier over time, and are more sensitive to installation position and temperature.

For this reason, all SANGUS fans are equipped with high-quality ball bearings designed for long-term operation.

Copper has significantly better electrical conductivity than aluminium. Motors with copper windings generally operate more efficiently, generate less heat, and provide more reliable long-term performance.

While aluminium windings reduce manufacturing costs, they may negatively affect efficiency, durability, and thermal performance. SANGUS fans use copper motor windings to ensure dependable operation throughout the product’s service life.

Bathroom fan electronics must be protected against moisture, while the humidity sensor must remain exposed to the surrounding air to provide accurate measurements.

In some low-cost designs, the humidity sensor is mounted directly on the control board inside the protected housing. This compromises measurement accuracy because the sensor cannot respond quickly to changes in room humidity.

SANGUS fans use a separate sensor placement strategy that allows accurate humidity detection while keeping the control electronics properly protected.

The lightweight PET-film shutter allows the fan to be installed both on walls and ceilings without significantly restricting airflow.

Rigid plastic shutters are heavier and may not open fully when installed in certain orientations, reducing extraction performance. The flexible PET shutter provides a good balance between airflow efficiency and protection against reverse airflow.

For installations where maximum backdraft protection is required, additional duct-mounted backdraft dampers are widely available and can be installed separately.

Airflow (m³/h) indicates the volume of air the fan can move under low-resistance conditions.

Air Pressure (Pa) indicates the fan’s ability to overcome resistance in the ventilation system, such as long ducts, bends, grilles, or external vents.

As duct resistance increases, airflow naturally decreases. A fan with higher air pressure maintains a larger percentage of its nominal airflow in real-world installations.

For installations with long or complex duct runs, air pressure can be just as important as airflow.

Not necessarily.

Weather forecasts usually refer to outdoor relative humidity. Relative humidity depends strongly on air temperature. When cool outdoor air enters a heated room, its relative humidity typically decreases.

As a result, even when outdoor humidity is very high, indoor humidity may remain below the fan’s activation threshold.

In most cases, no.

Relative humidity changes naturally as air temperature changes. When air cools, its relative humidity increases, even if the amount of moisture in the air remains unchanged.

This often occurs during the night, during seasonal temperature changes, or in poorly heated rooms. The humidity sensor correctly detects the increase in relative humidity and activates the fan.

If this behaviour occurs frequently, consider increasing room temperature, improving ventilation, or using a dehumidifier. Disabling the fan is generally not recommended, as prolonged high humidity promotes mould growth and condensation damage.

Yes. All SANGUS fans are designed for both wall and ceiling installation.

The lightweight PET-film backdraft shutter has been specifically selected to ensure reliable operation regardless of mounting orientation. Unlike some rigid plastic dampers, it does not significantly restrict airflow when the fan is installed vertically.

For best performance, the fan should be positioned as close to the ceiling as practical, where warm and humid air naturally accumulates.

Yes. SANGUS fans can be connected so that the timer is activated automatically when the bathroom light is switched on.

When the light is turned off, the fan continues operating for the selected delay period and then switches off automatically.

This arrangement combines automatic ventilation with user convenience and is one of the most popular installation methods.

The fan can also be connected to a PIR motion sensor or activated manually using a moisture-protected push button.

The ideal humidity setting depends on the room size, ventilation conditions, and local climate.

As a general recommendation:

• 50–60% RH – Dry environments or well-ventilated bathrooms
• 60–70% RH – Typical residential bathrooms
• 70–80% RH – Rooms with naturally high humidity or occasional condensation issues

Most users achieve excellent results with settings around 60–65% relative humidity.

If the fan runs more frequently than desired, increase the threshold slightly. If condensation remains visible after showers, decrease the threshold.

SANGUS fans are designed to provide high airflow while maintaining low energy consumption.

Depending on the model, power consumption ranges from approximately 12 W to 18 W.

For comparison, even if a 12 W fan operates for 8 hours every day, its annual energy consumption would be approximately:

12 W × 8 h × 365 days = 35 kWh per year

This is typically lower than the annual energy consumption of many household appliances and represents only a small fraction of a household’s electricity usage.

Because the humidity sensor operates the fan only when necessary, actual energy consumption is often significantly lower.