TEP 350x100 mm Return Air Grille, RAL 5024 — Wall or Ceiling

A return grille, not a supply grille

This is the distinction that matters when choosing.

Supply grilles (single or double deflection) have adjustable blades, because conditioned air must be aimed exactly where it's needed: towards the ceiling for mixing, into the occupied zone for cooling, sideways to clear an obstacle.

The TEP grille is for extract — stale air is drawn out of the room into the ductwork. Here direction no longer matters: air enters the grille from every direction regardless of blade angle. That is why the blades are fixed at 45° — a simpler, more robust and cheaper construction, with no moving parts that can loosen or jam over time.

Practical rule: adjustable-blade grilles on supply, TEP grilles on extract. In a properly designed system, the two types work together.

Wall or ceiling — the same grille

Unlike supply grilles, whose size depends on their position relative to the occupied zone, a return grille can be mounted on either the wall or the ceiling.

In practice:

• On the ceiling — the usual position in offices, hotel rooms and retail with suspended ceilings; warm stale air rises naturally and is drawn off at the highest level
• High on the wall — where the ceiling won't take ductwork; same effect, simpler run
• Low on the wall — for heavy-air extract (garages, plant rooms, laboratories), where pollutants collect at floor level

The 350x100 mm format

At only 100 mm high and 0.035 m² face area, this is a compact format for low airflows: extract from individual rooms, bathrooms, small offices, corridors, plant rooms.

The flat format fits where a taller grille wouldn't — above a door, in a false-ceiling recess, in a parapet.

The blades run parallel to the 350 mm side.

RAL 5024 — pastel blue

The grille is supplied ready painted in RAL 5024, a light pastel blue. This shade is frequently used in:

• Medical spaces — consulting rooms, clinics, laboratories
• Classrooms and educational spaces
• Colour-coded technical areas — where colour marks the service (blue for air, red for fire, etc.)
• Interiors with colour accents, where the grille becomes a design element

Electrostatic paint polymerises onto the metal: it does not flake, and withstands repeated cleaning and UV.

Versions available to order

Our recommendation: on extract from dusty, greasy or humid spaces (kitchens, workshops, laundries), choose the TEP-E accessible version — it allows periodic cleaning without removing the grille from the wall or ceiling.

Specifications

FAQ

Can the blades be adjusted? No — they are fixed at 45°. This is a return grille, where air direction doesn't matter: stale air is drawn out of the room, not blown into it. If you need adjustable blades, you need a supply grille: single or double deflection.

Can it be ceiling mounted? Yes. Unlike supply grilles, the TEP mounts on either wall or ceiling — the ceiling is in fact the usual position in offices and hotel rooms with suspended ceilings.

Can I use the same grille for supply? Technically yes, but not recommended: air supplied through fixed blades can't be aimed, so it will blow in whatever direction the construction dictates. In an office or bedroom, that means a draught felt directly by occupants.

What size do I need for extract? It depends on the extract airflow and the acceptable noise level. Send us your design airflow and room use; we'll confirm the right size free of charge.

Are other colours available? Yes — electrostatic painting in any RAL colour, to order. RAL 5024 is the stock version.