Duct height (mm):

You must enter a valid duct height in millimetres.

Duct width (mm):

You must enter a valid duct width in millimetres.

Duct length (m):

You must enter a valid duct length in metres.

Floor or wall penetrations:

You must select the type of penetration.

No. of penetrations:

You must enter a valid number of penetrations.

Fyrewrap width:

You must select the Fyrewrap width.