AirEx is an 'Internet of Things' (IoT) enabled innovative smart ventilation control that reduces the home's heat loss by 15%, with a c. 2-3 years payback. It is basically an "intelligent airbrick" that replaces the home's existing air bricks to help improve the thermal efficiency of the building fabric. The in-built smart sensors analyse environmental conditions (e.g. temperature, humidity, air quality), while its cloud-based algorithms responsively regulate the airflow by adjusting the aperture of the vent. It uses AI to predict occupants' behaviour and weather pattern for more efficient air flow optimisation across the home. The vents communicate via radio frequency with a wi-fi-connected AirEx hub, through which data can be viewed by the landlord or the occupant.