Spot Diffusers are constructed in high grade aluminium. They are having external frame with flat frontal face and angled internal cores. Removable center core assembly can be removed easily for concealed fixing purpose and also for operating the damper by means of screws. For air supply butterfly damper can be re vetted on the back side of the diffusers. 

Application     Air supply or air return to different heights from 2.6 mtrs to 4.0 mtrs in Air-conditioning, ventilating and heating systems, High air handling capacity. Useful in modular ceiling application where a ceiling tile can be replaced by a round diffuser of any neck size. 

    Overlapped in false ceiling by means of hidden fixing systems or re vetted on to a visible circular duct as well as directly on the plenum boxes. 

Sizes Available:       For Round Diffusers

Neck Size Ø150 Ø200 Ø250 Ø300 Ø350 Ø400 Ø450 Ø500
Outer Size Ø250 Ø300 Ø355 Ø405 Ø465 Ø515 Ø570 Ø620

For Tile Replacement Diffusers

Neck Size Ø150 Ø200 Ø250 Ø300 Ø350 Ø400 Ø450
Outer Size 595 595 595 595 595 595 595

Standard Finishes
 Available in natural aluminium, anodized or powder coated is standard RAL white colours


Jet Diffusers are implemented using extruded aluminium construction. Designed to discharge large volumes of air in all four directions with minimum pressure drop and low sound level external frame with flat 33mm frontal face and inclined in internal core center cores assembly removable type to remove easily for cleaning purpose and for concealed fixing as well as for damper operation. Available in one way, two way, three way or four way. 

Application:      Air supply or air return between 2.6 mtrs and 4.0 mtrs high in Air-conditioning, ventilating and heating system. 

Overlapped in false ceiling by means of hidden fixing systems or replacing a false ceiling tile. 

Sizes:     Standard and non-standard square and rectangular sizes are available both flush type and step down models will be made as per the requirements.

Neck Size 150 225 300 375 450 525 600
False Ceiling Opening Size 235 310 385 460 535 610 685


Armstrong board or Tegular diffusers or Title Replacement Diffusers helps in adjusting air volumes to ensure balancing as per envisaged design. They have a smooth and easy operation. A black frame of 50mm, depth and inner blades assembly. Available in aluminum or mild steels as well as in screw operated or lever operated types. Aluminum collar dampers are opposite blades operated and mild steel dampers are parallel operated. Can be made for any required sizes. Round butterfly type collar dampers are also available

Application     Suitable to control the volume of air behind the grilles or diffuse air-conditioning, ventilating and heating systems. 

Mounting:      Installed in ducts by means of metal screws or re vetted directly behind the grilles or diffusers.

Standard Finishes    

  • Aluminum : Natural aluminum, anodized or powder coated in black color.

  • Mild Steel : Painted in black or powder coated in black color.


Duct Diffusers are implemented using frame with flat frontal face and inner 'V' grooved blades or inner aerofoil blades connected to the frame by means of rods and bushes. Can be operated manually or motorized by means of nylon bushes or by gears. Available in parallel type or opposite blades types. Dampers constructed in aluminium galvanized steel or mild steel. Available in any standard or non standard sizes. Round duct dampers are also available. 

Application:      Suitable to control the air volume in ducts in air-conditioning, ventilating and heating systems. Ensures duct system air balancing. 

    Mounted in the branches of air distributions ducts by means of bolts and nuts. 

Standard Finishes

  • Aluminium: Natural aluminium or powder coated in standard RAL colours

  • Galvanized Steel : With Aluminium paint. Mild Steel : With black or red oxide paint as well as in powder coated finish

Our Location

Contact Us

Boda Aluminum Products Co.,LTD

Address: Jingjiang, Taizhou City
Jiangsu Province, China
Zip code - 214500
Telephone: +81 18262317598