Glidevale MV254 Vertical Extension is part of a range of glidevale products for ventilating underfloor areas and cavity walls. This MV254 extension fits between the two halves of the MV251 Periscope to increase the overall depth adjustment up to 5-6 brick courses. Modular design means additional units can be used to increase depth adjustment.
Surface mounted white plastic hit & miss ventilator with integral flyscreen most commonly used for covering air vents in homes, motorhomes and caravans. Adjustable sliding grill accommodates an open or closed position. Available in 3 sizes.
Glidevale MV251 periscope vent is part of a range of glidevale products for ventilating underfloor areas and cavity walls. This MV251 vent provides vertical adjustment for 3 to 4 courses and is can connect directly to the MV250 airbrick. Suitable for cavities from 50mm to 100mm.