A device for supply of a gas to a volume includes a supply conduit, which is connectable to a gas source and which includes an outlet end, and a porous body, which is provided at the outlet end.The device is arranged to permit the supply of the gas through the porous body. The device includes an attachment member which includes a surface and a channel extending through the surface. The porous body is attached to the surface and the outlet end is connected to the attachment member in order to permit the supply via the channel.