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HELLA-AT slot diffusers are designed for cooling or heating in standard office height of min 2,5 m to 3,5 m.

Diffuser lengths are specifically designed to fit into standard T-Bar application of 600 to 2400mm ceiling grids.
Ideal supply temperature to ambient should not exceed 10K to ensure low terminal velocities in the occupied zone.

Exceeding these guidelines can result in draft in occupied zone or stagnant heated air below the ceiling.

HELLA-AT slot diffusers have deflectors which been designed to have non-vision construction. These deflectors are as standard black and slide from left to right easily to assure a good air outlet pattern adjustment.

HELLA-A slot diffusers are manufactured from profiled aluminium and have as standard black deflectors. Slot diffusers are painted to RAL 9010 as standard. Available on request in anodized aluminum satin finish.

HELLA-AT has an optional Hit & Miss damper which makes the diffuser ideal for balancing in supply and return air application.
Deflectors can be easily adjusted from left to right to adjust the flow pattern for supply horizontal or in the middle for vertical and return air applications.

Slot diffusers contain a mounting bridge as standard which can be mounted directly inside the duct, or to be easily mounted to the plenum box.


Optional extra accessories
Insulated and non-insulated plenum box

Mounting bridge

Selection table
Table below shows the general product performance for more details please see selection software or contact your local Systemair office


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