Positive Input Ventilation (PIV) with built-in 500W heater for whole house mould and condensation control. Smart SenseTM control allows quick and accurate setup. Variable speed control allows the unit to be effective in a property up to 150m2. Automatic summer shut-off stops warm air coming back into the property. Flexible heater mounting options. Parts of this product are now made using recycled material; therefore, the colour of the plastic may vary from white to black. This will not change the function, performance or impact the form or fit of the product in any way and more importantly improves the environmental credentials of this product.