Ventilation systems are becoming very common in new build houses in the UK. They provide excellent air circulation and can greatly improve the air quality in your home. When installed and maintained they work seamlessly in the background delivering fresh air 24 hours a day. Modern homes with their superior levels of insulation and air tightness benefit significantly from an ventilation system. Mechanical heat recovery ventilation is one type of ventilation system that not only extracts but supply’s to rooms in your home. With the increase in air pollution is now more important ever to maintain your ventilation system to ensure that it is not delivering polluted directly into your home.