CertificationThe CE mark is placed o all products manufactured by ALBERTI F.LLI s.n.c. and certification of conformity is issued according to UNI EN 14351-1
and UNI EN 13659 regulations, in application of the 89/106/CE European directive.
Is usually defined as “air permeability” The characteristic of any closed window to leave passing air in case there is a
pressure difference between the inside and the outside. |
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