Ventilation Layout

Varied roof shapes and situations require a variety of different appraoches. The advice below is for general information only, for further guidance on roof space ventilation please consult the relevant BR & EU approved documentation.

lapVent installation - plans for the church house

lapVent installation - plans for the old bakery

lapVent installation - plans for a town house

lapVent installation - plans for a country house

Dimensions & Capacities

Width: 305mm
Depth: 115mm
Length: 530mm

The m³/h flow rate per lapVent - Building Research Establishment test figures.

Out-flow = 11,326 mm² at 10pa.
In-flow = 10,540 mm² at 10pa.

Flap closes at 70m³/h and rest open under normal pressures

The free airflow calculating area is confirmed as in the order of 20,000mm²

Leading the field: lapVent is the first product on the market to undergo this stringent type of testing - in the future others will have to follow suit.

Millennium Product (4056)

Recycle Materials