Ventilation grilles, made of aluminium, with individually adjustable, horizontal blades

Ventilation grille with droplet shaped blades

  • Nominal sizes 225 × 125 – 1225 × 525 mm
  • Volume flow rate range 23 – 2000 l/s or 83 – 7200 m³/h
  • Grille face made of aluminium with anodised finish
  • Front border, 23 mm or 27 mm wide
  • Concealed screw fixing

Optional equipment and accessories

  • Grille face in RAL CLASSIC colours
  • Installation subframe
  • Installation subframe for fitting filter media
  • Attachments for volume flow rate balancing and air direction control
  • Spring clip fixing



  • Ventilation grille of Type AT as supply air or extract air variant for comfort zones and industrial zones
  • Directed supply air discharge for mixed flow ventilation
  • Blades are adjustable to meet different local requirements
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +4 K
  • For installation in walls, sills and rectangular ducts

Special characteristics

  • Individually adjustable blades
  • Front border in two widths
  • Concealed screw fixing, spring clip fixing or countersunk holes
  • Optional installation subframe and casing for the fitting of filter media

Nominal sizes

  • Nominal length: 225, 325, 425, 525, 625, 825, 1025, 1225 mm
  • Nominal height: 125, 225, 325, 425, 525 mm

Other dimensions upon request



Front border

  • 27 mm wide
  • G11: 23 mm wide


  • Concealed screw fixing
  • G11: Concealed screw fixing (23 mm)
  • A11: Countersunk holes (only 27 mm)
  • B11: Spring clip fixing (27 mm)
  • H11: Spring clip fixing (23 mm)

Parts and characteristics

  • Sloped border with chamfered inside edge
  • Individually adjustable, horizontal blades
  • Factory fitted perimeter seal
  • Vertical centre mullion for nominal lengths over 625 mm


  • AG, AS, D, DG: For volume flow rate balancing and for air direction control


  • Installation subframe: For the fast and simple installation of ventilation grilles
  • Filter casing: Frame with filter element and spring clip fixing (only with 27 mm wide front border)

Construction features

  • Asymmetrically supported blades

Materials and surfaces

  • Border and blades made of aluminium
  • Border and blades anodised, E6-C-0, natural colour
  • P1: Border and blades powder-coated, RAL CLASSIC colour

Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135


  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022


Times Square, Vietnam

  • Project
  • Our Job
  • Solution

Times Square (Vietnam) is a high-rise building in District 1, Ho Chi Minh City, Vietnam. This tower is a 40 storey joint tower and features a modern architecural style. The height to the top of the tower is 164 m. The tower is curently third tallest building in Ho Chi Minh City after M&C Plaza and Bitexco Financial Tower, it is also the fifth tallest building in Vietnam. Times Square Vietnam includes a five-star hotel, luxury apartment, office space and a convention center. Throught floor-to-ceiling wondows, the bulilding presents unprecedented views from each office, apartment and hotel floor. The facade ia an icon on the city skyline with curved glass-curtain wall and dynamic architectural lighting.

TROX has provided full package of air distribution system as the following:

-Volume Control Dampers : Type SLC

-Fire & Smoke Dampers : Type SFD

-Fire Shutter Dampers : Type FSD-EM

-Non Return Dampers : Type BDD-A

-Supply Air Grilles : Type AT-A, AT-D

-4 way Diffusers : Type ADTF

-Drum Louver : Type AIL

Special part we have supplied is Swirl Diffusers which customer wants to use for the high ceiling of the lobby which is 8m, then we proposed to use TROX VDL-H which is able to perform at this height and got their approval for size 400 with 52 sets from TROX China.

Berggasthof Platzlalm - Kaltenbach


Hochzillertal – Berggasthof Platzlalm

An air of luxury. There is no reason why a cosy mountain inn should not be every bit as comfortable as a 5-star hotel.

Berggasthof Platzlalm can be found right in the popular ski resort Hochfügen, Hochzillertal, near the alpine road Zillertaler Höhenstrasse. The chalet offers 30 sleeping possibilities, a great sun deck and, for ultimate relaxation: a sauna – all at an altitude of approx. 1,800 metres.


Its blend of traditional and modern design creates a pleasant, welcoming atmosphere. It is a place where you simply feel good.

TROX components ensure a comfortable indoor climate


TROX components ensure a comfortable indoor climate. Products from the air handling expert, such as swirl diffusers, grilles, disc valves, fire dampers and volume flow controllers, were installed in the mountain inn, for example, in the bar lounge and in the dining and sitting room. Naturally, the installation had to comply with technical requirements for air handling and noise,  but the visible technological elements also had to match the overall visual appearance of the rooms and lounges, characterised by beautiful old wood. The grilles from TROX were perfect for the job.

TROX products in the Hochfügen ski resort


Thanks to the installed components from TROX, guests will be comfortable in the inn no matter the temperature outside. Furthermore, the tried and tested fire dampers ensure a high degree of safety. TROX products create an excellent indoor climate and pleasant atmosphere – even in winter and at 1,800 metres!

OKADA Manila

  • Project
  • our Job
  • our Solution
  • Products

In the Entertainment City gaming strip in Parañaque, Manila a new casino resort and hotel complex is developing. The OKADA Manila, named after his owner Kazuo Okada, occupies 45 hectares of land and over 26 hectares are allocated for gaming, 8,400 square meters for shopping and there is an 8,361 square meters indoor complex “The Cove". The Cove is able to hold up to 4,500 guests in its night clubs and at the white sand beach. All is covered by a glass dome to symbol a pearl. The hotel has 993 rooms and is divided by two coral shaped arms linked with two sky bridges. A center piece of the OKADA Manila is “The Fountain". It is the largest fountain in the Philippines and the second largest in the world of after the fountain in Dubai. 

For such a huge and prestigious project reliable partners were needed to fulfill the challenges created by the unique and impressive architecture. TROX Malaysia and especially our partner Dico Marketing were involved in the design stage to assist the consultant in overcoming some challenges on the air distribution. After the project was awarded to the contractor TROX helped them resolve the specific challenges which included lead time and redesign in some areas.

Dico Marketing were always prepared to be on site and support the local project team. TROX Malaysia, with the support of the TROX Group, was able to meet the challenges which included technical support and reducing lead times.

TROX supplied over 15,000m of slot diffusers (ESD), 10,000 grilles (AF, AG, AH, AR, AT), diffusers (ADT) and jet nozzles (TJN),

7,000 fire and smoke dampers (FSD, SFD) and over 23,000 balancing dampers (SLC, CBD) prior to the end of 2016.

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Thank you for your message!

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +60 6 678 8188 | Fax: +60 6 678 8288 (388)