NBS Source
Type CLV Circular Louvred Ventilator

Application

Designed to be retrofitted to ventilate an existing cavity wall.

Suitable for after-fit drill and vent applications.

Description

A circular ventilators with an airflow aperture rating of 2100 mm².


Features and Benefits:

  • Incorporates integral location grips.
  • Louvers deflect driving rain and provide insect screening.
  • Available in five colours.

General information

Shape

Circle

Color

White

Brown

Black

Beige

Orange

Material

Polypropylene

Size

79 x 15 mm

70 mm internal diameter - requires 70 mm hole.

Uniclass

Pr_30_59_96_93 Ventilation gratingsPrimary

CAWS

F30/175 Cavity ventilators

Specification data - Ventilation gratings Enhanced data

Apertures

Circular hole.

Work sizes

79 x 15 mm.

70 mm internal diameter.

Material

Polypropylene.

Colour

White.

Black.

Brown.

Beige.

Terracotta.

Execution

Installing air bricks, gratings and ventilators in walling.

OverallDiameter

79 mm.

Hole diameter 70 mm.

Ventilation opening

2100 mm²/m.

Literature

Protecting the Building Envelope Volume 28 (cavity tray, damp proofing, ventilation and cavity closers)

Protecting the Building Envelope Volume 28 (cavity tray, damp proofing, ventilation and cavity closers)