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The Powrmatic tfv product (formerly Skyvent) is designed to improve the building environment, providing natural ventilation, daylighting and low heat loss. It is available as a single or twin flap ventilator offering a range of features:

• Tested for a use as a smoke ventilator to BS 7346 Part 1: 1990
• Energy efficient
  low power
  very low air leakage when closed
  insulated options can attain U-values as low as 0.17W/m²/^oK
  
• High quality aluminium extrusions provide a robust and durable construction
• Weatherproof when closed as tested to BS 5368 Parts 1 & 2
• Optional aluminium (single skins & insulated), polycarbonate or glazed lids
• Polyester powder paint finish to any standard BS or RAL colour
• Full range of accessories available, including birdguards, security guards & insect mesh
• Suitable for fixing into a variety of applications:
  onto roof upstands
  direct onto roof sheeting
  into roof glazing
• Full range of control options available

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