Merlin Humidity Tracking Fan – 100 mm SELV Extractor

Automatic Humidity-Activated SELV Fan for Wall, Ceiling & Window Installations

The Merlin Humidity Tracking Fan is a fully automatic 100 mm (4″) axial extractor designed for wall, ceiling, or window applications*. It is SELV-rated and IPX7-certified, making it safe for use in bathroom zones 1 and 2. Operating at just 2 watts via a 12 V DC motor, this energy-efficient fan automatically switches to full boost when it detects a rapid increase in humidity, then returns to a low trickle once levels stabilise. It’s whisper-quiet, maintenance-free, and includes a remote humidity sensor and transformer unit for flexible installation.

Key Features & Benefits

• Automatic Humidity Tracking: Boosts on humidity spikes, then returns to trickle for continuous ventilation.
• Energy Efficient: Consumes only 2 W when active, thanks to 12 V DC ball-bearing motor. 
• IPX7 Water Resistance: Rated for operation in Zones 1 and 2 bathrooms.
• Low Maintenance: Durable ball-bearing motor requires no servicing.
• Manual Override: Pull-cord allows user to manually trigger boost mode.
• LED Function Display: Indicates operating status for user convenience.

Product Details

• Extraction Rate: 90 m³/h (25 L/s)
• Voltage & Power: SELV 12 V DC, 2 W in operation
• Installation: Includes fan unit, remote sensor, transformer; separate window kit required.
• Safety Rating: IPX7 waterproof, suitable for bathroom zones 1 & 2; SELV-compliant per IEE 17th Edition.
• No Maintenance: Sealed unit with guaranteed dynamic sensor head.

Typical Uses

• Humidity-controlled ventilation in bathrooms, showers, en-suites, utility rooms.
• Suitable for wall, ceiling, or window mounting with optional kit.
• Ideal for retrofit or new-build installations requiring quiet, automatic extraction.

*Note: Window fittings require a separate kit. The transformer and humidity sensor must be placed outside bathroom Zone 2. LED function display and pull-cord included.