Combination ventilator sets for background venting and heat producing appliances.

• Core anti draught ventilators can be installed in new build, but benefit the installer most for use in existing walls
• To fit in existing cavity wall make hole through full cavity wall by using 127-130mm core drill ensuring a small incline towards the outer wall
• Large flanges around the external cowl and internal grille allow minor irregularities to be covered easily and adequate fixing. External cowl will push onto sleeve and can be silicone sealed to face or screw fixed 
• Size: 127mm(D) x 350mm

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