ArrestAir-Pro – External grille for superior anti-draught performance 350mm (14″) long, 152mm (6″) dia plastic tube Use 152-162mm diameter core bit drill Internal inverted quad directional grille DiffuseAir. Stamped ‘Important Do Not Block’. Stainless steel screws, plugs and installation instructions 100cm2 Free-area equivalent Gas: Max rated input 27 kW 92,000 BTU

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