Features and benefits: • Aesthetically pleasing and a simple to install modular system • Excellent airflow properties • Independently tested • Offers reduction of draughts and light compared to basic through wall ventilation • Cowl or grille version available with or without baffle • Internal finish with open louvre grille Combination anti-draught ventilator sets with excellent airflow properties to provide ventilation for heat producing appliances and/or background room ventilation (without hit & miss). Offers reduction of draughts and light compared to basic through wall ventilation.