9" x 6" Ventilation Set, Terracotta

HETAS APPROVED 9" x 6" Ventilation Set, Terracotta ~ Provides over 100cm² equivalent area. ~ Equivalent area Advantica tested. ~ Internal baffles reduce light and draughts. ~ Internal fixed open flush fitting louvre ventilator. ~ U.V. stabilised air brick and louvre ventilator. Equivalent area = 10700mm²