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Metal air diffusers for ventilation are air distribution components made of steel, stainless steel or aluminium, designed for supplying air to rooms and extracting it from them. They are used in mechanical ventilation and heat recovery systems in residential, commercial and industrial buildings. The el-vent.com range includes Classic DP and DI standard diffusers, Silent DPN, DPNN, DIN and DINN acoustic models, INOX DNU stainless steel diffusers, SQUARE-A square ceiling diffusers and PLD aluminium slot diffusers. Different series are intended for different airflow requirements, duct dimensions and installation solutions.
We deliver worldwide.
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Metal air diffusers are ventilation system components used to distribute supply air within rooms or collect air for extraction. They are installed at duct outlets, in ceilings and at other locations approved by the manufacturer. Metal diffusers are used in houses, apartments, offices, retail spaces and other premises with mechanical ventilation or heat recovery systems.
Depending on the model, diffusers are manufactured from galvanised steel, stainless steel or aluminium. These materials provide different levels of mechanical strength, surface finish and resistance to environmental conditions.
The el-vent.com range includes nine metal air diffuser series: Classic DP, Classic DI, Silent DPN, Silent DPNN, Silent DIN, Silent DINN, INOX DNU, SQUARE-A and PLD. They differ in application, shape, airflow adjustment, acoustic performance and installation dimensions.
Classic DP are round supply air diffusers manufactured from galvanised steel and powder-coated in white RAL9003 Signal white. This series is intended for distributing supply air in mechanical ventilation systems.
An adjustable damper allows the airflow opening and air volume to be regulated. The traditional round design suits various residential and commercial ventilation installations.
Available Classic DP diameters: Ø80, Ø100, Ø125, Ø160, Ø200 and Ø250 mm.
Classic DI are round galvanised steel diffusers designed for extracting air from rooms. They have a white RAL9003 Signal white powder-coated finish and an adjustable airflow damper.
This series is used in extract ventilation systems, including bathrooms, utility rooms and other spaces where controlled air extraction is required.
Available Classic DI diameters: Ø80, Ø100, Ø125, Ø160, Ø200 and Ø250 mm.
Silent DPN are acoustic diffusers designed for both air supply and extraction. They are made of galvanised steel and powder-coated in white RAL9016.
The specially designed valve helps reduce airflow noise. An adjustable damper allows airflow regulation. The technical documentation includes pressure loss, sound pressure and sound attenuation information.
Available Silent DPN diameters: Ø80, Ø100, Ø125, Ø160 and Ø200 mm.
Silent DPNN are acoustic metal diffusers designed for air supply. They feature a connection spigot with a sealing gasket, an adjustable airflow damper and an additional damper for controlling the direction of supply air.
This construction allows both airflow volume and air direction to be adjusted. The diffusers are powder-coated in RAL9016 and have documented acoustic performance characteristics.
Available Silent DPNN diameters: Ø100, Ø125 and Ø160 mm.
Silent DIN are acoustic diffusers developed specifically for extract ventilation. Their valve construction is designed to reduce airflow noise, while an adjustable damper allows the extract air volume to be set.
They have a white RAL9016 powder-coated finish and are suitable for applications where air extraction and acoustic comfort must be considered together.
Available Silent DIN diameters: Ø100, Ø125, Ø160 and Ø200 mm.
Silent DINN are metal acoustic extract diffusers with a gasketed connection spigot. Their specialised construction is intended for lower system noise levels, and airflow can be adjusted using the damper.
The diffusers are powder-coated in RAL9016. The gasket helps improve the seal at the duct connection, although final airtightness also depends on correct installation.
Available Silent DINN diameters: Ø100, Ø125 and Ø160 mm.
INOX DNU are universal air diffusers made from AISI304 stainless steel. They are intended for both air supply and extraction and have an adjustable airflow damper.
Stainless steel is suitable where corrosion resistance and a metallic surface finish are important. Suitability for aggressive environments must be checked against the actual exposure conditions, as AISI304 is not resistant to every chemical environment.
Available INOX DNU diameters: Ø100, Ø125, Ø150, Ø160 and Ø200 mm.
SQUARE-A are square ceiling diffusers manufactured from aluminium and finished in white RAL9016. They can be used for both supply and extract ventilation.
The square design suits ceiling layouts where a clean geometric appearance and air distribution over a larger visible face are desirable. These diffusers can be used in offices, retail premises and other commercial spaces.
Before selecting SQUARE-A, verify the dimensions, connection arrangement and required airflow of the specific model.
PLD are aluminium linear, or slot, diffusers designed for both air supply and extraction. They have a white RAL9016 powder-coated finish.
Separate dampers allow airflow to be adjusted in each slot. The diffusers can be used for distributing cool or warm air according to the ventilation system design.
The PLD range includes versions with 1, 2, 3 or 4 slots and nominal lengths of approximately 500 or 1000 mm. Exact dimensions and performance depend on the model.
Linear slot diffusers are selected when a linear airflow arrangement and modern ceiling appearance are required. Suitable plenum boxes may be needed for their connection.
Selection should be based on the ventilation system airflow, connection dimensions, installation location, air direction and acoustic requirements.
Classic DP and Silent DPNN are designed for supply air, while Classic DI, Silent DIN and Silent DINN are designed for extract air. Silent DPN, INOX DNU, SQUARE-A and PLD can be used for both directions, subject to their technical specifications.
The correct application is important for air distribution, balancing and overall system performance.
Round diffuser connection diameters must match the duct or mounting connector. The catalogue includes round metal diffusers from Ø80 to Ø250 mm, although the available sizes differ between series.
For square SQUARE-A and linear PLD diffusers, external dimensions, plenum box selection and connection arrangements must also be considered.
Many metal diffusers feature an adjustable damper for changing the free airflow opening and regulating air volume.
Silent DPNN additionally allows supply air direction to be adjusted, while PLD allows individual slot airflow adjustment. Final settings should be established according to the ventilation design and measured airflow.
Silent DPN, DPNN, DIN and DINN are specifically designed for acoustic comfort. Their construction helps reduce noise generated by moving air.
However, the series name alone does not establish the actual sound level. Airflow (m³/h), pressure loss (Pa), sound pressure level in dB(A) and installation conditions must be considered.
Standard and acoustic metal diffusers are generally manufactured from galvanised steel. Classic DP and DI have a white RAL9003 finish, while the Silent models have a RAL9016 finish.
INOX DNU are made from AISI304 stainless steel, while SQUARE-A and PLD are aluminium diffusers. Select the material according to environmental conditions, structural requirements and interior design.
Metal air diffusers are installed in various mechanical ventilation and heat recovery systems:
A supply air diffuser distributes incoming air within a room, while an extract diffuser collects air for removal. Certain universal series can perform both functions.
Classic DP is intended for supply air and Classic DI for extract air. Both are manufactured from galvanised steel, finished in RAL9003 and equipped with adjustable airflow dampers.
Silent DPN is a universal acoustic diffuser for supply and extraction. Silent DPNN is designed for supply air and additionally has a sealing gasket and an airflow direction adjustment damper.
Both are acoustic extract air series. Silent DINN additionally has a sealing gasket at its connection spigot. Available diameters also differ.
No. Their acoustic construction helps reduce noise, but the actual sound level depends on airflow, air velocity, pressure loss, the duct system and installation.
Yes. They can be used in heat recovery systems when the diffuser's intended application and technical performance match the system design.
INOX DNU are made from AISI304 stainless steel and resist many common causes of corrosion. Exposure to chlorides, aggressive chemicals or marine environments requires additional assessment.
Most series in this category have adjustable dampers. The mechanism and available adjustment range depend on the individual model.
Round diffusers are commonly connected to round ducts, while square diffusers suit particular ceiling layouts and air distribution requirements. Actual performance depends on the design and technical characteristics.
A linear slot diffuser is an elongated air distribution component with one or more narrow airflow openings. The PLD range allows airflow adjustment in individual slots.
Determine the duct connection dimensions and design airflow, then check the specific model's pressure loss, air distribution and acoustic performance.
Yes. Their surfaces should be cleaned periodically with products suitable for the specific metal and surface coating.
Yes. el-vent.com delivers worldwide. Shipping conditions, costs and delivery times depend on the destination and order contents.
el-vent.com offers Classic DP, Classic DI, Silent DPN, Silent DPNN, Silent DIN, Silent DINN, INOX DNU, SQUARE-A and PLD metal air diffusers for ventilation systems in residential, commercial and other premises. The selection includes round, square and linear slot constructions for different air distribution requirements.
We deliver throughout Lithuania and worldwide.
