5 Inch Core Drill Ventilator (G900)

The Manthorpe 5' Core Drill Vent is designed for use when ventilating a room with a gas appliance, but can also be used for general through wall ventilation. The vent can easily be fitted in both refurbishment and new build situations with the use of a 5' (127mm) diameter core drill.  The kit includes a cowl vent for exterior use, a louvre grille for inside, a 350mm length of pipe duct and an optional anti-draught baffle. This baffle reduces the airflow and also the feel of a draught through the vent.  Without the use of the anti-draught baffle, the free area of the vent is 100cm, enough to supply an appliance with a rated input of 27kW or 92,000 Btu/h (in accordance with BS5440 Pt.2:2000). With the anti-draught baffle installed, the effective free area of the vent is reduced to 70cm (BRE tested) providing enough ventilation for an appliance with an input rating of 21kW or 71,500 Btu/h.  The external cowl minimises uncomfortable draughts, reduces noise and light from outside the property and acts as a barrier against wind driven rain while the louvre fits on the internal wall and, similarly helps to reduce draughts, noise and light penetration.