Customizing an Air Handling Unit (AHU) is about matching the unit precisely to the project’s application, environment, standards, and client requirements. Below is a clear, practical framework you can use when talking to customers or coordinating with your technical team.

1. Define the Application & Industry

• Different applications drive different designs:
• Commercial buildings – offices, malls, hotels
• Industrial – factories, workshops, food processing
• Clean environments – hospitals, pharmaceuticals, electronics
• High spaces – airports, stations, exhibition halls
• Special – cold rooms, labs, data centers

This determines cleanliness level, materials, filtration, and controls.

2. Airflow & Capacity Customization

Key design parameters:

• Airflow (CMH / CFM)
• Cooling capacity (kW / TR)
• Heating capacity (hot water / steam / electric)
• Fresh air ratio (100% FA, FA + return air, recirculation)

Optional:VAV or CAV design,Redundant fans (duty/standby)

3. Cooling & Heating System Selection

Choose according to site conditions and energy strategy:

• Cooling options
• Chilled water coil
• DX coil (with compressor)
• Evaporative cooling
• Heat recovery (rotary wheel / plate exchanger / run-around coil)
• Heating options
• Hot water coil
• Steam coil
• Electric heater
• Heat pump

4. Filtration & Air Quality

Customized by air cleanliness requirement:

• Pre-filter: G4 / MERV 8
• Medium filter: F7–F9 / MERV 13–15
• HEPA / ULPA (cleanroom, hospital)
• Optional:
• Activated carbon filter
• UV-C sterilization

5. Humidity Control

• Depending on process or comfort needs:
• Humidification
• Electrode humidifier
• Steam humidifier
• Ultrasonic
• Dehumidification
• Cooling coil + reheat
• Desiccant wheel
• Typical industries:
• Pharma / electronics → strict RH control
• Comfort HVAC → optional

6. Fan & Motor Configuration

• Fan type
• EC plug fan
• Centrifugal fan
• Backward-curved fan
• Motor
• AC motor
• EC motor (energy-saving)
• Control
• VFD
• Duty/standby configuration

7. Casing & Structural Design

• Customized for durability and installation conditions:
• Panel thickness: 25 / 30 / 40 / 50 mm
• Insulation: PU / rock wool
• Casing material
• Galvanized steel
• Stainless steel (304 / 316)
• Aluminum
• Special
• Hygienic design
• Explosion-proof
• Outdoor weatherproof (IP-rated)

8. Control System & Automation

• Options range from basic to smart systems:
• Stand-alone control panel
• PLC + HMI
• BMS / BACnet / Modbus integration
• Sensors:
• Temperature
• Humidity
• CO₂
• Differential pressure

9. Installation & Layout Customization

• Horizontal / vertical AHU
• Ceiling mounted / floor mounted
• Modular or split design (for site access limits)
• Left-hand / right-hand airflow
• Noise control:
• Double-skin panels
• Sound attenuators
• Vibration isolators
• 10. Standards & Certifications
• Customized by market:
• Eurovent
• CE
• ASHRAE
• AHRI
• Hygienic standards (GMP, ISO 14644)
• Local codes (Middle East, EU, Southeast Asia, etc.)

The air volume handled by the unit ranges from 2,600 m³/h to 160,000 m³/h, and also can customizable airflows, allowing customized selection for different clean room requirements. The unit has two major series: the mixed air type (R series) and the fresh air type (F series). The refrigerant media include the chilled water type and the direct expansion type.

• Design Features: Excellent materials, unique structure, reliable performance, exceeding standards.
• Measures to ensure reliability: Excellent materials are the fundamental guarantee for the reliability of the equipment.
• Maintain the temperature: The unit adopts a double-layer insulated panel design, with both inner and outer panels standardly configured as color-coated steel sheets, galvanized steel sheets, or stainless steel sheets. The frame utilizes an aluminum alloy frame panel structure with thermal break technology, with an overall panel thickness of 50 mm or 30 mm.
• Overall sealing measures: The unit incorporates specialized sealing measures between all panel-to-panel and panel-to-frame junctions, ensuring air-tightness performance that exceeds the standards of HVAC equipment.
• Noise reduction and sound insulation measures: Equipped with high efficiency and low noise backward-curved centrifugal fans with strong overload capacity.
• Antibacterial and mold-resistant measures:
  • The drain pan is constructed from antibacterial material, which can continuously sterilize with a sterilization efficiency of over 99.99%.
  • The inner wall panels of the unit can be optionally made from antibacterial materials to achieve a better antibacterial effect.
• High-efficiency dust removal and sterilization: This product series offer three levels of filters (primary, medium and high-efficiency), the highest filter grade can reach H13. It also provides composite filtration options, such as fiber-activated carbon filters, TiO2 sterilizers, and UV sterilizers. These features ensure effective dust removal and sterilization, guaranteeing fresh and healthy indoor air through a robust filtration system.

Guangzhou Jetex-Lloyd's Machinery Ltd. is an energy-saving and environmentally friendly technology enterprise specializing in the R&D, manufacturing, sales, and service of HVAC, air handling units, and related products. It has been awarded honors such as "National High-Tech Enterprise", "Guangdong Province Specialized & Innovative Small And Medium-Sized Enterprise", "Guangdong Province Innovative Small and Medium sized Enterprise", and "Guangdong Province Enterprise Of Observing Contract And Valuing Credit". JETEX has received strong technical support from South China University of Technology and Guangdong Pharmaceutical University since they established cooperation in technical research. Our partners include numerous Fortune 500 companies and globally renowned enterprises.