Steeple Deluxe Quick Internal Fit Wall Kit Brown With Backdraught Shutter

Can be installed from inside the property. Includes an adjustable wall liner and external grille with a rubber seal on the outside of the building. · · · Can be adjusted to wall thicknesses of 225mm to 390mm · · Adjustable wall liner to fit a wide range of wall thicknesses (225mm to 390mm) · · No need to reset after a loss of power · · Suitable for use with any 100mm fan · · Can be used as a passive air inlet grille · · Save time and money on installation costs · · Protect your home from backdraughts