Central Air Conditioning Modular Combined Type Air Handling Unit with Customizable Air Flow

Product Overview

Air Handling Unit

Features at a Glance

• Air Filtration and Purification Function
• Temperature and Humidity Regulation Function
• Air Mixing and Ventilation Function
• Air Delivery and Distribution Function
• Noise Control Function
• Operation Monitoring and Protection Function

Cleanroom HVAC Applications

Technical Specifications

AHU Configuration & Components

Main AHU Components

• Fresh Air / Return Air Section
  Controls the introduction and recirculation of air according to the HVAC design.
• Pre-Filtration Section
  Removes larger airborne particles before air enters the finer filtration stages.
• Cooling Coil
  Removes sensible and latent heat from the air. It can be connected to a chilled-water system or other specified cooling source.
• Heating Section
  Provides heating when required for temperature control or winter operation.
• Humidification / Dehumidification
  Configured when the cleanroom process requires tighter humidity control.
• Fan Section
  Provides the required airflow and static pressure for the downstream air distribution system.
• HEPA Filtration
  Can be incorporated where the system design requires high-efficiency final filtration.
• Control Section
  Monitors and regulates operating parameters such as temperature, humidity, fan status, and differential pressure.

Airflow & Filtration System

Fresh / Return Air
↓
Pre-Filter
↓
Fine Filter
↓
Cooling / Heating Coil
↓
Fan Section
↓
HEPA Filter*
↓
Cleanroom Air Distribution

HEPA filter location depends on the cleanroom HVAC design. In some systems, final HEPA filtration is installed at the terminal FFU or ceiling level rather than directly inside the AHU

Temperature & Humidity Control

The AHU can be configured to support temperature and humidity control through cooling coils, heating sections, humidification and dehumidification functions. Control parameters are selected according to the cleanroom process, product requirements, outdoor conditions and HVAC design.

• Supply air temperature
• Return air temperature
• Relative humidity
• Cooling coil
• Heating coil
• Humidifier
• Dehumidification
• Sensors
• PLC/HMI

HVAC System Integration

The Clean Room AHU can be integrated with:

• Chilled Water Chiller
• Chilled Water Pumps
• Cooling Towers, where applicable
• Ductwork
• HEPA Filters
• FFUs
• Cleanroom Terminal Units
• Differential Pressure Monitoring
• Temperature & Humidity Sensors
• BMS

The AHU primarily conditions and supplies air, while terminal filtration and airflow distribution are determined by the overall cleanroom HVAC design.

Engineering & Selection Process

Engineering & Selection Process

• 1. Requirement Analysis
  Review cleanroom classification, room volume, occupancy, process heat load, outdoor air requirements, temperature and humidity targets.
• 2. Airflow Calculation
  Determine supply and return airflow based on room requirements, air-change strategy, pressure relationships and process requirements.
• 3. AHU Selection
  Select airflow capacity, static pressure, cooling/heating capacity, filtration stages, fan type and control configuration.
• 4. System Integration
  Coordinate AHU with chillers, pumps, ductwork, HEPA filters, FFUs, sensors and BMS.
• 5. Manufacturing
  Manufacture the AHU according to the approved configuration and technical specifications.
• 6. Testing & Commissioning
  Perform applicable factory inspection and support on-site commissioning according to the project scope.

Related Cleanroom Project Experience

Pharmaceutical Cleanroom Project – Mauritius

• Application: Pharmaceutical manufacturing
• Scope: HVAC system design / AHU integration / installation support
• Country: Mauritius

Products Description

• Mixing Section

  • Details: Fresh air (OA) and return air (RA) dampers are typically interlinked and controlled to maintain a constant total airflow (in constant volume systems). The damper actuators can be electric, pneumatic, or electronic, receiving signals from the Building Management System (BMS).

  • Key Parameter: Minimum outside air ratio (typically 15-30%, modulated based on demand control ventilation or codes).

• Filtration Section

  • Filter Grades (EN/ISO Standards):

    • G3/G4 (Pre-filters): ~80-90% efficiency on ≥5µm particles. Protects equipment.

    • F5-F9 (Medium-efficiency): 40-95% on ≥1µm particles. Standard for commercial IAQ.

    • H10-H14 (HEPA/Sub-HEPA): >95% on ≥0.3µm particles. For cleanrooms, ORs, labs.

  • Differential Pressure Gauge/Switch: Monitors pressure drop across the filter bank. Alerts when the filter is loaded and needs replacement—critical for preventive maintenance.

• Coil Section

  • Construction & Materials:

    • Tube & Fin: Copper tubes with mechanically expanded aluminum fins. Often coated with a hydrophilic (water-loving) film to improve condensate drainage and inhibit microbial growth.

    • Rows/Circuits: Cooling coils are typically 4-8 rows deep. More rows increase dehumidification capacity. Internal circuits (for water or refrigerant) ensure even distribution and heat transfer.

    • Drip Pan: Located below the cooling coil. Must be sloped, insulated, and equipped with a proper P-trap to ensure condensate drainage and prevent air leakage and microbial contamination.

• Humidification Section

  • Type Details:

    • Steam Humidification (Isothermal): Most common. Uses clean, dry steam from a central boiler or self-contained generator, injected via a steam dispersion manifold. Precise and hygienic.

    • Adiabatic Humidification: Uses high-pressure water nozzles or ultrasonic atomizers. Cools the air as water evaporates (adiabatic process).

• Fan Section

  • Fan Types:

    • Forward-Curved Centrifugal Fans: Lower pressure, higher volume. Common in smaller units.

    • Backward-Inclined/Airfoil Centrifugal Fans: Higher efficiency, non-overloading power curve, quieter operation. Preferred for large, efficient AHUs.

  • Drive Arrangement: Belt-driven (adjustable, requires maintenance) or direct-driven (higher efficiency, lower maintenance).

  • Variable Frequency Drive (VFD): Standard on modern AHUs. Modulates fan speed based on duct static pressure or temperature reset strategies for significant energy savings in part-load conditions.

Engineering Process

• Requirement Analysis
  Review airflow, cooling/heating load, filtration and cleanroom requirements.
• AHU Configuration
  Select casing, filters, coils, fans and control components according to project specifications.
• Manufacturing & Inspection
  Assemble and inspect the AHU before shipment.
• Installation & Commissioning
  Support installation, airflow adjustment and system commissioning.
• Testing & Documentation
  Provide applicable testing records, operation manuals and project documentation.

Related Products

SHP also provides cleanroom HVAC and environmental control equipment, including:

• Air-Cooled Chillers
• Fan Filter Units (FFUs)
• Cleanroom Air Showers
• Pass Boxes
• Cleanroom Doors and Windows
• HVAC Control Systems

Company Profile

As a leading supplier of clean room system and clean room products,SHP is an organization that prides itself both on technical expertise as well as next level customer care.SHP offers Cleanroom Solutions to meet our clients' particular requirements specialized for pharmaceutical,biotechnology and microelectronic cleanrooms.We also provide a range of Clean Room products including wall panel,door&window and a series of clean room equipment.

As an ISO 9001:2015 certified organization,we are committed to continually improving our customer service programs while meeting or exceeding your product quality criteria.With our comprehensive customer solution offerings,excellence in products,and decades of technical expertise,we are confident that SHP can match the best to your application.

Certifications

Certifications

• ISO 9001:2015
• CE Certificates (if applicable)
• Cleanroom Related Testing Reports

Our Customers

Customer Photos

Packing and Shipping

Why SHP

• 20+ Years of Cleanroom Engineering Experience and Expertise
• Over 2,100 Completed Cleanroom Projects
• Work Delivered Across 40+ Countries
• 12 Senior Engineers in Cleanroom and HVAC Fields
• Full Capability in Design, Manufacturing, Installation & Commissioning
• Coverage for Pharmaceutical, Electronics, Medical and Laboratory Facilities

FAQ

Q1: Where is your company?

A1:Our company is located in Suzhou City, close to Shanghai. It's a 1.5-hour drive from PVG Airport.

Q2: Are you a manufacturer or a trading company? What can I buy from you?
A2: We are manufacturers. We focus on cleanroom projects, air showers, FFUs, through boxes, dosing rooms, laminar flow hoods and benches, AHUs, and sealed doors and Windows. 

Q3:When is your delivery time? 
A3: If your cleanroom project includes AHU, the delivery time is 35 days. If you purchase goods without an AHU, the delivery time is 10 days. 

Q4: How long is your warranty period? What kind of after-sales service can you offer?
A4: Our warranty period is two years after the completion of the project. During the warranty period, if there are any problems, we will replace it. If you can't handle it, we will send an engineer to solve it for free.

Q5:Can you conduct cleanroom validation? 
A5: Yes. We can provide DQ, IQ, OQ and PQ documentation, FAT/SAT reports, operation manuals, maintenance guides and complete cleanroom drawings according to project requirements. 

Q6:What are your advantages?
A6: We have a complete technical team consisting of 12 senior cleanroom and HVAC engineers to provide you with technical support. We have completed over 2,100 cleanroom projects in China and overseas. Such as Japan, Indonesia, Thailand, Bangladesh, India, North Macedonia, Saudi Arabia, Yemen, Russia, Moldova, Switzerland, Norway, the United Kingdom, Spain, France, Belgium, Kuwait, Tunisia, Mauritius, Sri Lanka, Mongolia, Philippines, Nepal, Sudan, Somaliland, Australia, New Zealand, Canada, Algeria, Egypt, Singapore, and the United States.