City-Flo XL in practice – Bergen

The Norwegian city of Bergen is particularly prone to air pollution. In really cold winters, a “lid” forms over the city. This is due to the phenomenon of temperature inversion – air “high” above the city is warmer than the “central air” and, as a result, pollutants cannot rise and disperse in the upper atmosphere. In the winter of 2009/2010, when contaminant levels were at their worst, Bergen was the most polluted city in Europe.

City with Europe’s worst pollution
Bergen’s poor air quality is increasingly a health concern. Especially for asthma sufferers and those with lung complaints, exposure to sulphur dioxide, nitrogen oxides and other air

contaminants has a dramatic impact on health. If they are not effectively removed by an air filter, these pollutants in the outdoor air can easily enter houses and buildings.

Striding ahead in Norway
Poor air quality is a constant topic of debate in Norway’s media. For the ventilation industry, the situation in Bergen sets a reference point and a switch to City-Flo XL is now being considered for all large Norwegian towns. City-Flo XL removes particles, smells, gases (sulphur dioxide, nitrogen dioxide and ozone included therein), volatile organic substances and polycyclic aromatic hydrocarbons (PAHs). When City-Flo XL is installed, the building’s

users are guaranteed indoor air of a high quality (as per European standard EN 13779). A number of reports have confirmed the benefits. Bergen’s fire brigade provides one example. Since installing City-Flo XL, the brigade has noticed a great difference in air quality. The brigade’s building has a total of fourteen airsupply plants. Initially, City-Flo XL was installed in three of these. However, with the marked improvement in indoor air quality, the fire brigade has now ordered filters for the remaining eleven units.