NBS Source
ERV External Roof Ventilator
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Application

Designed to permit the roof void to breathe and prevent condensation occurring.

Description

External roof ventilator for use with flat and low pitched lead covered roofs.


Features and benefits:

  • High free airflow of 6000mm2 / 12,000 mm².
  • Natural lead finish.
  • Integral baffle and drain slot.
  • New and existing work application.

General information

Color

Grey

Material

Lead

Shape

Rectangle

Size

210 x 140 x 160 mm

Small - plus 335 x 260 mm base surround. Free airflow area 6,000 mm², including drain-out slot.

405 x 140 x 160 mm

Large - plus 530 x 260 mm base surround. Free airflow area 12,000 mm², including drain-out slot.

Uniclass 2015

Pr_30_59_29_30 Flat roof ventilatorsPrimary

CAWS

H71/110 Lead sheet fully supported roof covering

J31/360 Roof ventilators

J31/60 Roof ventilators

Specification data - Flat roof ventilators Enhanced data

Material

Lead.

To BS EN 12588.

Colour

Grey.

Size

-

Diameter or section (minimum)

210 x 140 mm.

Upstand (minimum)

160 mm.

Flange base (minimum)

335 x 260 mm.

Literature

Ventilation Product Guide

Ventilation Product Guide

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)

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