Product Overview  ——Ceiling Jet Type Central Air Handling Unit for HVAC System and Clean Room Ventilation

Modular Air Handing Unit

Features at a Glance

•  Air Mixing & Proportioning

  • Purpose: To balance energy efficiency with indoor air quality (IAQ).

  • How it Works: Dampers automatically adjust the ratio of outside fresh air and indoor return air. This allows for "free cooling/heating" using return air to save energy while ensuring sufficient fresh air intake for occupant health and ventilation requirements.

•  Air Filtration & Purification

  • Purpose: To protect downstream equipment and improve IAQ by removing contaminants.

  • How it Works: Air passes through a series of filters.

    • Pre-filter: Traps large particles like dust and lint, protecting coils and fans.

    • Medium-efficiency filter: Removes finer particles (e.g., pollen, mold spores), common in commercial buildings.

    • High-efficiency/HEPA/Chemical filters (Optional): Used in critical environments like hospitals and labs to remove PM2.5, bacteria, viruses, or gaseous pollutants.

• Air Temperature & Humidity Control

This is the core conditioning process, achieved via heat exchangers and humidifiers.

• • Cooling & Dehumidification: Air passes over a cooling coil carrying chilled water (~7°C) from a chiller or direct-expansion refrigerant. The air cools below its dew point, causing moisture to condense and drain away.

  • Heating: Air passes over a heating coil carrying hot water from a boiler or using electric resistance elements.

  • Humidification: In dry climates or during winter, a humidifier (steam, ultrasonic, or evaporative) adds precise moisture to the air.

• Air Movement & Distribution

  • Purpose: To provide the motive force for airflow and deliver it to the occupied spaces.

  • How it Works:

    • Fan: The "heart" that provides the pressure to move air through the ductwork. Modern AHUs use Variable Frequency Drive (VFD) fans to modulate airflow based on demand, saving significant energy.

    • Silencer/Attenuator: Reduces noise generated by the fan and airflow.

    • Conditioned air is then distributed quietly and evenly to rooms via ductwork and diffusers.

•  Energy Recovery (A Key Feature in High-Efficiency AHUs)

  • Purpose: To dramatically reduce heating and cooling energy consumption.

  • How it Works: A heat recovery device (e.g., heat wheel, plate heat exchanger) is placed where the exhaust air and fresh intake air streams cross. It transfers thermal energy from the exhaust air to pre-condition the incoming fresh air, potentially reducing loads by over 60%.

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.

Related Products

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.

Our Certification

Our Customers

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Packing and Shipping

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 offer documentaries of DQ, IQ, OQ and PQ. Still fat & Sitting. Product operation manual, maintenance guide and a complete set of cleanroom drawings. 

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.