The main condition for a person’s wellness - fresh air for breathing.
Nowadays people spend up to 90% of their day in closed spaces, which makes the supply of fresh air even more important. Remember, that without food a human can survive multiple weeks, without water just one week, but without air just a couple of minutes!
- The supply of physiologically needed amount of oxygen can suffice with 1 m3/h (0.3 l/s) of fresh air, but then we would have to use full body suits, in which the air would be fed into directly.
- The LBN 231-15 building standard of Latvia determines that the absolute minimum for a fresh air supply in a space, where the only source of contamination is a human - 15 m3/h per one person, which conforms with the European standard EN 13779 - a low, but acceptable room air quality.
- Conforming with SNiP norms, the fresh air supply could not be lower than 20 m3/h per one person.
- North American ASHRAE standard 62-1999 “Ventilation for Acceptable Indoor Air Quality” determines the fresh air supply for office spaces to be 36 m3/h (10 l/s) per one person.
- German standard DIN 1946 Teil 2 01-94 determines that an class A office space has to supply 60 m3/h of fresh air per one person.
- Take in consideration that in the rooms where smoking is allowed, the fresh air supply norm jumps up to even 115 m3/h per one person. Similarly the air supply needs to be increased if the room has any other air pollution sources.
The goal of ventilation systems is to withdraw the polluted air and to supply the room with fresh, filtered and, if necessary, heated outside air.
Ventilation systems are designed, built and transferred by us to the client corresponding with the European and Latvian standards.