APSOL DECKER AIR HANDLING UNIT

INTRODUCTION
The APSOL DECKER Air Handling Unit (AHU) is an air treatment system designed and manufactured in accordance with EN 1886 and ASHRAE standards. It is engineered to precisely control temperature, humidity, air cleanliness, and airflow in environments with stringent requirements such as pharmaceuticals, semiconductors, battery manufacturing, food processing, cleanrooms, and high-precision industrial applications.

The AHU is available in airflow capacities ranging from 1,000 to 100,000 m³/h, with an external static pressure up to 2,000 Pa, and optionally up to 25,000 Pa for special applications such as drying, deep dehumidification, industrial painting, and seed processing.

The unit is equipped with direct-driven Kruger plenum fans powered by high-efficiency IE1–IE4 motors, integrated with Variable Frequency Drives (VFD). The design fully complies with AMCA 210 / 300 standards for performance and sound level.

CONSTRUCTION AND MATERIALS

● Aluminum framework with thermal break (TB2), corner joints made of composite thermal insulation material.

● 50 mm PIR insulated panels with thermal transmittance U = 0.4 W/m²·K (Class T1 – EN1886:2007), 0.5 mm pre-painted galvanized steel sheets with anti-corrosion coating.

● High airtightness (Class L1), mechanical casing strength Class D1, low air leakage, and easy maintenance with quick-lock external clamping panel design.

● Insulated access doors with safety lock handles and double-seal gaskets for air leakage prevention.

● 1.0 mm thick SUS 304 condensate drain pan, insulated with 20 mm PE foam, dual-direction drainage.

● Sound and vibration insulation designed in compliance with ISO 3744 / AMCA 300 standards.

APPLICABLE STANDARDS

● EN 1886:2007 – Casing strength, air leakage, thermal insulation, and thermal bridging.

● AMCA 210 / 300 – Fan performance, airflow measurement, and sound testing.

● ARI 410 – Performance rating of air-to-air and air-to-liquid heat exchangers (coils).

● EN 779 / EN 1822 – Air filtration classification (G, F, and H classes).

● ASHRAE 62.1 / 90.1 – Ventilation, indoor air quality, and energy performance requirements.

FUNCTIONAL MODULE CONFIGURATION

KEY DIFFERENTIATORS  OF APSOL DECKER AHU     

● Full thermal bridge–free structure (TB2) – eliminates dew point formation and optimizes energy loss.

● 50 mm PIR panel, Class T1 (U = 0.4 W/m²·K) – superior insulation exceeding EN1886 standards; optional 75–100 mm panels available for cold storage or low-temperature applications.

● Direct-driven plenum fan – beltless design reduces dust, ensures quiet operation, and is suitable for ISO Class 5–7 cleanrooms.

● Flexible modular design – easily expandable for heat recovery, humidification, desiccant dehumidification, and condensation dehumidification.

● Japanese NICHIAS technology – ensures deep dew point control for battery and pharmaceutical industries.

● Standardized manufacturing process – components available in large quantities with a lead time of 15–20 days.

● Suitable for mass production – ideal for industrial projects requiring uniform equipment systems.

BASIC AHU CONFIGURATION

AHU Type 1: includes a G4 filter, a cooling coil (direct expansion or chilled water type), and a plug fan.

This configuration is typically used for factory cooling applications or as a secondary cooling unit for the APSOL DECKER desiccant dehumidifier.
The combination of a standard AHU with a standard desiccant dehumidifier significantly reduces overall system cost.

AHU-Type 1

AHU Type 2: includes a mixing box section for blending return air and fresh air, a G4 filter, a cooling coil (direct expansion or chilled water type), and a plug fan.

This configuration is typically used for large factory cooling applications with high sensible heat loads (such as garment factories, plastic molding plants, and printing facilities).

AHU-Type 2

AHU Type 3: includes pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), and a plug fan.

This configuration is typically used for cleanrooms with high sensible heat loads.

AHU-Type 3

AHU Type 4: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), and a plug fan.

This configuration is typically used for cleanrooms with high sensible heat loads.

AHU-Type 4

AHU Type 5: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4), a plug fan, fine filters (F5 to F9), and a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type).

This configuration is typically used for cleanrooms with high sensible heat loads.

AHU-Type 5

AHU Type 6: includes pre-filters (G2 to G4), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), and a plug fan.

This configuration is typically used for applications that require precise control of both temperature and humidity.

AHU-Type 6

AHU Type 7: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), and a plug fan.

This configuration is typically used for applications that require maintaining both temperature and humidity conditions.

AHU-Type 7

 AHU Type 8: includes pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), and a plug fan.

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity.

AHU-Type 8

AHU Type 9: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), and a plug fan.

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity.

AHU-Type 9

AHU Type 9-Ext 1: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4) and fine filters (F5 to F9), a bypass damper, a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), and a plug fan.

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity, with a high air recirculation rate.

AHU-Type 9 – Ext 1

AHU Type 9-Ext 2: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, a plug fan, and an additional fine filter (F5 to F9).

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity.

AHU-Type 9 – Ext 2

AHU Type 9-Ext 3: includes a mixing box section for blending return air and fresh air, an exhaust fan, pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), and a supply fan.

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity, with high external static pressure requirements.

AHU-Type 9 – Ext 3

AHU Type 9-Ext 4: includes pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), a plug fan, and HEPA filters (H10 to H14).

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity, with purified supply air.

AHU-Type 9 – Ext 4

 AHU Type 9-Ext 5: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4) and fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, an electrode steam humidifier (if required), a plug fan, and HEPA filters (H10 to H14).

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity, with purified supply air.

AHU-Type 9 – Ext 5

AHU Type 10: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4), a supply fan, fine filters (F5 to F9), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, and an electrode steam humidifier (if required).

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity, with purified supply air.

AHU-Type 10

AHU Type 11: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4), a cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type), a heating coil using steam, hot water, or electric heater, and an electrode steam humidifier (if required). The conditioned air is then further mixed with return air in a second mixing section before passing through the supply fan and fine filters (F5 to F9).

This configuration is typically used for cleanrooms that require precise control of both temperature and humidity with a high air recirculation rate.

AHU-Type 11

 AHU Type 12: includes a mixing box section for blending return air and fresh air, pre-filters (G2 to G4), a primary cooling coil (direct expansion type using refrigerant R407C or R410A, or chilled water type). The air is then further mixed with return air in a second mixing section before passing through the supply fan, fine filters (F5 to F9), a secondary cooling coil, a heating coil using steam, hot water, or electric heater, and an electrode steam humidifier (if required).

This configuration is typically used for cleanrooms that require precise control of temperature and humidity with high recirculation airflow and a large proportion of fresh air.

AHU-Type 12

AHU Type 13: includes pre-filters (G2 to G4) and fine filters (F5 to F9), a primary cooling coil (as part of the dehumidification module), a secondary cooling coil, a condenser coil (within the dehumidification module), a compressor, and a fan.

This configuration is typically used for cleanrooms requiring precise temperature and humidity control with energy recovery from the condenser (dehumidification module). However, it is not widely adopted due to its complexity and limited operational stability.

AHU-Type 13

AHU Type 14: includes a mixing box for blending return air and fresh air, pre-filters (G2 to G4) and fine filters (F5 to F9), a primary cooling coil (part of the dehumidification module), a secondary cooling coil, a condenser coil (within the dehumidification module), a compressor, and a fan.

This configuration is typically used for cleanrooms requiring both temperature and humidity control with energy recovery from the condenser (dehumidification module). However, it is not widely applied due to its complexity and limited operational stability.

AHU-Type 14

Additionally, there are extended configurations that incorporate heat recovery wheels, heat recovery plates, and desiccant rotor dehumidification systems, as well as specialized configurations designed for net-zero energy applications.