Merlin Eco Extract Fan dMEV – 100 mm (4″)

Silent Energy‑Saving dMEV Axial Fan with Humidity Boost

The Merlin Eco Extract Fan is a low-energy, near-silent 100 mm decentralised Mechanical Extract Ventilation (dMEV) fan designed for wall, ceiling, or window installations in bathrooms and kitchens. Featuring a durable ball-bearing DC motor, it provides continuous trickle (6–9 L/s) airflow and boosts automatically to 15 L/s when humidity rises. Certified SAP Q‑eligible with specific fan power as low as 0.18 W/L/s, it operates as quietly as 10.8 dB(A) on trickle mode and is available in standard 230 V or SELV/IPX7 variants suitable for Zones 1 and 2.

Key Features & Benefits

• Near‑silent operation: Down to 10.8 dB(A) on trickle, under 20 dB(A) on boost.
• Energy‑efficient DC motor: Low consumption, long-lasting ball-bearing design.
• Automatic humidity boost: Self-boosts when humidity increases; then returns to trickle.
• Boost airflow: Up to 15 L/s, with trickle at 6–9 L/s.
• High efficiency: SAP Q-enabling specific fan power as low as 0.18 W/L/s.
• Class-leading durability: SELV/IPX7 version available for bathroom Zones 1 & 2.

Product Details

• Size: 100 mm (4″) duct diameter
• Installation: Wall, ceiling, or window (window kit required)
• Voltage: 230 V or SELV low-voltage option
• Motor: Ball-bearing DC
• Noise Levels: 10.8 dB(A) trickle, <20 dB(A)
• Airflow: 6–9 L/s trickle, 15 L/s boost
• SAP Compliance: Q-eligible; Specific Fan Power ~0.18 W/L/s 
• Protection: IPX4 (standard) or IPX7 (SELV)

Typical Uses

• Continuous humidity control in bathrooms, kitchens, WCs, utility rooms
• Ideal for new-build or retrofit social housing to meet SAP & Building Regs
• Quiet extraction suited for residential applications with minimal disturbance