Roof Double Leaf - Commercial (RDL-C)

Product features and details.
Roof Double Leaf Description

Roof Double Leaf – Commercial (RDL-C) is a double leaf smoke vent unit, designed for large area smoke and heat ventilation in commercial and industrial buildings within protected lobbies and stairwells, and warehousing and manufacturing facilities. They also provide natural comfort ventilation and when supplied with polycarbonate glazing will provide natural daylight. They are CE Certified to BS EN12101-2 and have been independently tested by an accredited third party.

They are available with insulated or uninsulated upstands for installation into prepared roof apertures. They are also available with adaptor bases for installation onto builders upstand curbs, profile metal roofing or within continuous glazing. Size range is width 1000 to 2500mm and length 1000 to 3500mm.

The units are manufactured according to ISO 9001 quality control standards from tempered, seawater and corrosion-resistant AlMg3 aluminium; with corrosion-resistant bearings. The aluminium is supplied mill finish as standard and free of silicones and may be powder coated white internally or powder-coated internally and externally to any RAL colour.

Specific Features
  • Certified to BS EN 12101-2
  • Compliant to Building Regulations Approved Document B & L
  • Opens to 90° within 60 seconds
  • May incorporate roof access
  • Provides natural comfort ventilation – durability-tested 10,000 cycles
  • Certified Non-Fragile to EN 1873
  • Available as square or rectangular, size range up to 2500 width x 3000mm length
  • Glazed in multiwall polycarbonate or solid insulated lid
  • Available with an upstand or with an adaptor to a builder’s upstand
  • High-quality corrosion-resistant aluminium to ensure low maintenance requirements and weather tightness
Thermal Transmission.

Values below are calculated centre pane U-values unless denoted otherwise. Complete unit U-values are available on request.

Typical Values U-Value (W/(m2.K))

Opening Leaf:

Uninsulated Aluminium

Polycarbonate multiwall 16 mm

Polycarbonate multiwall 25 mm *

Polycarbonate multiwall 32 mm *: 1.60

Solid insulated cover 20mm

Solid insulated cover 40mm *: 0.73


Uninsulated Aluminium

Insulated Aluminium 20mm

Insulated Aluminium 40mm *

* Available with thermal break aluminium profiles

BS EN 12101-2 Certification Data

Coefficient Value (Cv): 0.56*

Reliability – Fire: RE1000

Reliability – Comfort: RE10000

Snow Load: SL1500

Wind Load: WL250

Resistance to Heat: B300

Low Ambient Temperature: (-05)

* With wind deflectors

Technical Data

Impact resistant to EN 1873: 1200J

Water tightness to EN 1873: Pass

Fire rated to BS 476 Part 3: AA

Actuator Voltage: 24V DC

Optional Features
  • End switch indication position sensor
  • Polyester powder coating, internal colour RAL 9010 white or internally and externally to any standard RAL colour
  • Purpose made adaptor base available enabling the vent to be installed to a builder’s upstand curb or profiled roof
  • Fall arrest grid certified to EN1873 Soft Body Impact to 1200j is available for protection of opening in the open position
  • Bird or insect mesh available, will reduce vent flow characteristics
  • Aerodynamic wind deflectors are available to optimize aerodynamic efficiency
For all information regarding this product please download its datasheet.

Installation instructions.

Form Upstand
Mount Vent
Complete Connections
Get the installation guide.
Related Products
Roof Single Leaf - Residential (RSL-R)
Roof Access Hatch – Commercial (RAH-C)
Roof Single Leaf - Commercial (RSL-C)
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