4 core drill vents are designed for use when ventilating a gas appliance or supplying general through wall ventilation. Using a standard 4 core drill, the system can be fitted quickly and easily in both new build and refurbishment situations.
100mm (4”) Core drill ventilator
Easy to install with telescopic movement and louvered grille
Expands 100 to 195mm (4 to 73–4 ”)
Takes extension tube BM 811/B to extend further
Length: 100mm - 195mm
1 Year Guarantee Included