The horrifying thruth is that most buildings and houses function like large vacuum cleaners whereby we spend most of our time “in the filter bag” – e.g. indoors – an absurd situation but unfortunately the truth.

A growing body of scientific evidence has indicated that the air within homes and other buildings is up to 10 times more polluted than the outdoor air in even the largest and most industrialized cities. On top of that people spend approximately 90 percent of their time indoors. Thus, for many people, the health risks  to exposure to air pollution is immense.

Experts say this is because fumes from trains and traffic, pesticides, industrial pollution and pollen are trapped inside well-insulated homes, where they take much longer to clear without any wind or rain to help.

Inadequate ventilation can increase indoor pollutants like combustion sources such as oil, gas, coal, wood, and tobacco products; building materials and furnishings as diverse as asbestos-containing insulation, wet or damp carpet, and furniture made of certain pressed wood products; products for household cleaning and maintenance, personal care, or hobbies; central heating and cooling systems and humidification devices. The indoor climate also creates a living friendly environment for bacteria, fungus and virus to grow in.