Double Skin Air Handling Unit

CONFIGURATION SELECTION

The exact configuration is selected according to airflow, static pressure, cooling/heating load, filtration requirements, humidity requirements, and installation conditions.

A typical configuration can include: Fresh Air / Return Air → Mixing → Filtration → Cooling → Heating → Fan → Final Filtration → Supply Air. Additional sections can be incorporated where required.

DOUBLE SKIN AHU CONSTRUCTION

The main construction generally consists of:

• 1. Outer Skin – the outer panel protects the AHU from the surrounding environment. Depending on the application, pre-coated GI, PPGI, stainless steel, aluminium, or other suitable materials can be considered.
• 2. Inner Skin – the inner panel forms the air-side surface of the AHU. GI or stainless steel can be selected according to the required hygiene, corrosion resistance, and application conditions.
• 3. Thermal Insulation – insulation is installed between the inner and outer panels. Common configurations include PUF/PU insulation or mineral wool, with thickness and density selected according to the project requirements. Published Indian HVAC specifications show examples of double-skin AHU panels using approximately 25–50 mm insulated construction.
• 4. Structural Framework – the panels are supported by a rigid framework, commonly using aluminium or another suitable structural profile.
• 5. Sealing and Gaskets – suitable gaskets and sealing arrangements are used around panels, access doors, and section joints to reduce unwanted air leakage.
• 6. Access Doors – access doors are provided for inspection, cleaning, filter replacement, coil maintenance, and fan servicing.

DOUBLE SKIN AHU COMPONENTS

• Fan Section – the fan supplies the airflow required to overcome the resistance of the AHU, ductwork, filters, coils, dampers, and terminal devices. Fan selection should consider airflow, static pressure, efficiency, speed, noise, motor power and operating point.
• Cooling Coil Section – cooling coils can use chilled water or direct-expansion refrigerant. The coil selection considers cooling capacity, entering-air condition, leaving-air condition, airflow, water/refrigerant conditions, pressure drop and face velocity.
• Filter Section – different filtration stages can be incorporated depending on the required air quality: pre-filter, fine filter, bag filter, HEPA filter, or application-specific filtration.
• Heating Section – heating may be provided using a hot-water coil, steam coil, electric heater, or other suitable heating systems.
• Mixing Section – can combine fresh outdoor air with return air where the HVAC design requires recirculation.
• Damper Section – dampers regulate fresh-air, return-air, exhaust-air, and bypass airflow. Motorized dampers can be incorporated for automatic control.
• Drain Pan – collects condensate generated during cooling and dehumidification. For applications requiring enhanced corrosion resistance or hygiene, stainless-steel drain pans can be selected.

2. REDUCED CONDENSATION RISK

A well-designed insulated casing helps keep external surfaces warmer relative to the internal cold-air conditions, reducing the possibility of surface condensation.

Proper insulation, thermal-break construction, sealing, and operating conditions are all important for condensation control.

3. IMPROVED ENERGY EFFICIENCY

Better thermal separation can reduce unwanted heat gain or heat loss through the AHU casing. This can help the cooling or heating system operate more efficiently.

However, overall AHU energy performance also depends on fan efficiency, coil selection, pressure drop, filter loading, controls, duct design, and operating conditions.

4. STRONGER CONSTRUCTION

The combination of an external skin, internal skin, insulation, and structural framework creates a rigid enclosure suitable for industrial HVAC applications.

The casing can be engineered for the required operating and installation conditions.

5. BETTER AIR LEAKAGE CONTROL

Properly sealed panel joints, access doors, and section connections help minimize uncontrolled air leakage.

Reduced leakage is particularly important where the AHU is required to maintain controlled airflow and pressure conditions.

6. LOWER NOISE TRANSMISSION

The insulated double-panel construction can help reduce the transmission of fan and airflow noise through the AHU casing.

Actual acoustic performance depends on fan type, speed, casing construction, insulation, vibration isolation, ductwork, and installation.

7. IMPROVED INTERNAL AIR HYGIENE

The inner skin provides a defined air-side surface that can be selected for easier cleaning and maintenance.

For pharmaceutical, healthcare, food, and cleanroom applications, the internal construction should be selected according to the specific hygiene requirements.

8. BETTER PROTECTION OF INTERNAL COMPONENTS

The enclosed construction helps protect internal components such as filters, coils, fans, dampers, and other equipment from the surrounding environment.

9. SUITABLE FOR TEMPERATURE-CONTROLLED APPLICATIONS

Double-skin construction is suitable for AHUs handling conditioned air where maintaining controlled temperature is important. Applications can include:

• Pharmaceutical facilities
• Hospitals
• Cleanrooms
• Laboratories
• Commercial buildings
• Industrial production areas
• Electronics manufacturing
• Food-processing facilities

10. FLEXIBLE CONFIGURATION

Double Skin AHUs can be designed with different sections according to the application, with additional sections incorporated where required.

HOSPITAL AND HEALTHCARE INDUSTRY

AHUs can be engineered for controlled ventilation and air-conditioning requirements in:

• Operating theatres
• Patient areas
• Laboratories
• Isolation areas
• General hospital spaces
• The required filtration and pressure control depend on the specific healthcare application.

CLEANROOM INDUSTRY

Double Skin AHUs are suitable for cleanroom HVAC systems where controlled air quality and environmental conditions are important. They can incorporate:

• Fine filtration
• HEPA filtration
• Cooling
• Heating
• Humidity control
• Fresh-air control
• Pressure monitoring

AUTOMOBILE INDUSTRY

Industrial Double Skin AHUs can be used in:

• Manufacturing plants
• Assembly areas
• Paint-related HVAC systems
• Component manufacturing
• Inspection areas
• Controlled production spaces

ELECTRONICS INDUSTRY

Controlled air conditions are important in many electronics manufacturing environments. Applications can include:

• Electronics assembly
• Precision manufacturing
• Component production
• Testing areas
• Controlled production rooms

FOOD PROCESSING INDUSTRY

Double Skin AHUs can provide conditioned and filtered air for suitable food-processing and packaging environments.

TEXTILE INDUSTRY

AHUs can provide temperature, ventilation, filtration, and humidity management for selected textile processes.

CHEMICAL INDUSTRY

Industrial AHUs can be customized for suitable chemical manufacturing environments, with material selection based on the nature of the atmosphere and process.

COMMERCIAL BUILDINGS

Double Skin AHUs are widely suitable for centralized HVAC systems serving:

• Offices
• Hotels
• Shopping malls
• Airports
• Educational buildings
• Hospitals
• Commercial complexes

CUSTOMIZED DOUBLE SKIN AIR HANDLING UNIT

Vayuvents can customize the AHU according to:

• Airflow capacity
• Static pressure
• Cooling capacity
• Heating capacity
• Panel thickness
• Insulation material
• Inner and outer skin material
• Fan type
• Fan speed
• Coil configuration
• Filter stages
• HEPA filtration
• Fresh-air percentage
• Return-air percentage
• Damper arrangement
• Drain pan material
• Humidification
• Dehumidification

QUALITY-FOCUSED MANUFACTURING

At Vayuvents Pvt. Ltd., Double Skin AHUs are engineered with emphasis on thermal insulation, structural strength, air leakage control, filtration, airflow performance, maintainability, and application-specific requirements.

Double-skin AHU specifications vary significantly according to the project. For example, Indian institutional HVAC specifications commonly specify insulated double-wall panels, aluminium structural frames, access doors, sectionalized fan/coil/filter arrangements, and application-specific airflow and static pressure.

GET A CUSTOMIZED DOUBLE SKIN AIR HANDLING UNIT

If you are looking for a Double Skin Air Handling Unit Manufacturer and Exporter in India, Vayuvents Pvt. Ltd., Vasai, Maharashtra, provides customized AHU solutions for industrial, commercial, cleanroom, pharmaceutical, healthcare, and specialized HVAC applications.

Whether you require a Double Skin Industrial AHU, Cleanroom AHU, Commercial AHU, Fresh Air AHU, Hygienic AHU, or Customized Double Skin Air Handling Unit, Vayuvents can engineer the system according to your required airflow, static pressure, temperature, humidity, filtration, and installation conditions.

Contact Vayuvents Pvt. Ltd., Vasai, Maharashtra, India, for your Double Skin Air Handling Unit requirement.

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