9" x 6" Ventilation Set (Cowled) Terracotta

HETAS APPROVED 9" x 6" Ventilation Set (Cowled) Terracotta ~ Equivalent area Advantica tested. ~ Cowl and internal baffles reduce light and draughts. ~ Internal fixed open flush fitting louvre ventilator. ~ U.V. stabilised cowl, air brick and louvre ventilator. Equivalent area = 9800mm²