[EN 15665:2009, 3.4]:way (method) to express the required performance (for air pollution assessment)NOTE Criteria can be, for example, numbers of hours above 70 % RH in living room calculated on a standard week basis, number of minutes to reach 25 … Continue reading →

[EN 12792:2003, 93]:for ducts with circular cross-section the cross-sectional area (Ac) is based on the internal diameter (d), unless otherwise specified. For ducts with rectangular cross-section the cross-sectional area (Ac) is based on the product of the internal height and … Continue reading →

[EN 12792-2003, 95]:element inserted into an air distribution system or element of an air distribution system permitting modification of the air resistance of the system, and consequently changing the air flow rate (dampers), or shutting off the air flow completely … Continue reading →