*  Provides free additional heating

  *  Completely solar powered

  *  No mains or water connections

  *  One-off cost

  *  No running costs or maintenance

  *  Apt for DIY-installations

  *  Wall or roof mounted

  *  Only a discrete vent in the house

  *  4 different sizes

  *  Airflow up to 120 m3/hour

 *  Air flow control / on-off switch

Discreet indoor vent