Type CRSV Circular Recessed Soffit Ventilator Ventilation - Cavity TraysType CRSV Circular Recessed Soffit Ventilator Ventilation - Cavity Trays

Type CRSV Circular Recessed Soffit Ventilator

  • Polypropylene
  • Size 70/90 x 40 (Requires 70mm hole).
  • Colours: Brown or Black.
  • Free airflow 3,420mm² per ventilator.
  • Packaged in boxes containing 50no.
  • Suitable pitches 15 degrees upwards.

To provide airflow in and out of roof space via the soffit board. Suitable for introduction into existing soffit boards to fulfil airflow requirements. Also suitable for new build applications.


The CRSV differs from the standard CSV as it has a deep body that protrudes up into the soffit box.The airflow apertures are positioned around the sides of the deep body ventilator rather than through the top.This arrangement results in a far greater airflow rating per ventilator.Thus a lesser number are required to fulfil the statutory airflow levels. The Type CRSV can be used on most pitches of roof (appropriately spaced) and self-secures when pushed into a 70mm circular hole. Always ensure airflow via a soffit ventilator can reach the parts of the roof intended.

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