FAKRO - Smoke Ventilation Flat Roof Window Kit (DSF-D)

The Fakro DSF-D U6 Smoke Ventilation Flat Roof Window Kit is a premium natural smoke and heat exhaust ventilator (NSHEV) engineered for exceptional safety, insulation, and design performance. Purpose built for EN 12101-2 compliance, this system offers efficient smoke extraction, superb thermal insulation, and quiet operation - making it ideal for commercial and residential applications where both fire safety and comfort are priorities.

Key Features

• Powerful Smoke Extraction - equipped with four actuators that lift the sash 50cm parallel to the base, providing rapid smoke and heat removal during emergencies.
• Superior Insulation - features a triple glazed U6 unit with an impressive U-value of 0.79 W/m²K (glass U-value 0.5 W/m²K), ensuring high thermal efficiency and year-round energy savings.
• Enhanced Acoustic Performance - delivers an acoustic rating of 34dB (-1, -4), reducing external noise for improved indoor comfort.
• High Strength Construction - built with a multi chamber PVC frame mounted on an XRD base for a total upstand height of 30cm, providing excellent durability and insulation.
• Elegant Design - the discreet lifting mechanism remains hidden when closed, while the RAL9010 white PVC interior and RAL9005 black exterior with a dark edge glazing effect add a modern, architectural finish.

Integrated Smoke Ventilation Components

Each kit includes essential, fully integrated safety and control devices for reliable smoke and heat extraction:

• Control Unit (RZN4408K) - enables automatic and manual control of actuators.
• Alarm Push Button / Break Glass (RT45) - allows immediate manual activation during an emergency.
• Smoke Sensor (OSD 23) - detects smoke for automatic operation.

Optional add ons include:

• LP1 Switch for everyday ventilation use.
• Rain Sensor for automatic sash closure during rainfall (sold separately).

Technical Specifications

• Roof pitch compatibility: 0-15°
• Total upstand height: 30cm (with XRD base) 
• Thermal performance: U-value = 0.79 W/m²K (glass U = 0.5 W/m²K)
• Acoustic rating: 34dB (-1, -4) 
• Certification: EN 12101-2 (Smoke Ventilation Standard)

The Fakro DSF-D U6 Smoke Ventilation Flat Roof Window Kit offers the perfect balance of fire protection, thermal performance, and modern styling - ensuring buildings stay safe, compliant, and energy efficient while providing reliable natural ventilation and access to fresh air.