A diffuser is a required option for the KFUH heaters. Several options are available. The KFUH-90RD is a radial diffuser featuring a 90° hood. It has 4-way air flow for a wide pattern of air dispersion into your space. The radial diffuser does not have adjustable louvers.
The main photo shows the face of the radial diffuser, while the secondary photo is features the louvered front, but is illustrative of the 90° angle that would accompany the radial grille face.