- we breath 15.000 - 20.000 times a day and spend about 90% of our time indoors;
- indoors pollution can be as many as 100 times higher than outdoor pollution.
The air you breath may contain smells, gases, combuction products (which spread out in the air while you cook), dust, CO2, chemicals, viruses, bacteria, mould, condensation, carbon monoxide (if you have a fire place)