One brick size. With cowl Free area 100 cm² (15.1/2 in²). Through wall length: 280 mm to 330 mm (11" to 13") telescopic. Size of internal vent: 270 mm x 124 mm (11" x 5"). Cowl colour: Terracotta/internal vent white. For appliances up to 27 kW Net - (30 kW Gross).
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