NF E51-720*NF EN 12220:1998
Ventilation for buildings - Ductwork - Dimensions of circular flanges for general ventilation.

Standard No.

NF E51-720*NF EN 12220:1998

Release Date

1998

Published By

Association Francaise de Normalisation

Latest

NF E51-720*NF EN 12220:1998

NF E51-720*NF EN 12220:1998 history

• 1998 NF E51-720*NF EN 12220:1998 Ventilation for buildings - Ductwork - Dimensions of circular flanges for general ventilation.