Ventilation is not only the best way of preventing condensation in your home, it will also dramatically improve indoor air quality. Most ventilation systems provide health benefits by reducing naturally-occurring Radon gas and carbon monoxide. As well as this, many units are equipped with filters capable of removing up to 95% dust particles and other allergens. This can include pollen filters that can both help you keep cool indoors and enjoy the benefits of fresh pollen-free air. Hayfever sufferers can benefit massively from a place where they can escape pollen and focus on bringing the symptoms under control.