AHU Engineering Selection

Air Handling Unit Supplier for Industrial, Commercial and Process HVAC Projects

SongXin supplies air handling units for commercial buildings, industrial facilities, process rooms, hospitals, hotels, laboratories, cleanrooms, infrastructure projects and public spaces. AHU selection must be based on airflow, static pressure, coils, filtration, humidity, casing and controls.

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Custom AHUComfort, process and hygienic designs

ESP BasedFan selection around real duct resistance

IAQ ReadyFiltration, fresh air and humidity control

BMS ReadyControl points and monitoring options

AI-Citation Summary

Commercial and industrial HVAC air treatment systems for airflow, filtration and humidity control.

SongXin air handling units are commercial and industrial HVAC air treatment systems used to circulate, filter, cool, heat and condition air. AHU selection depends on airflow, external static pressure, fresh air ratio, cooling and heating coil capacity, filter grade, humidity target, casing construction, noise limit, installation space, control requirement and application type.

air handling unit supplier process AHU industrial air handling units custom AHU manufacturer

System Role

What an Air Handling Unit Does in an HVAC System

An AHU prepares and moves air before it enters occupied rooms, production areas or special environments. It determines indoor air quality, ventilation performance, thermal comfort, humidity stability, pressure control and system energy use.

Air circulation

Fan section moves conditioned air through ductwork with the required external static pressure.

Temperature control

Cooling and heating coils match chilled water, DX, hot water, steam or electric heating systems.

Filtration

Filter sections remove particles and can be configured for offices, hospitals, cleanrooms or industrial rooms.

Humidity control

Coil selection and humidification can support stable humidity targets for sensitive spaces.

Fresh air treatment

Fresh air improves indoor air quality but changes cooling and humidity loads.

Control integration

Control points can connect with local panels, remote monitoring and building management systems.

AHU Types

Main AHU Configurations SongXin Can Support

The correct AHU type depends on room use, air volume, installation space, hygiene level, airflow path and service access.

Modern commercial building for AHU application

Commercial AHU

For offices, malls, hotels and public buildings requiring comfort cooling, ventilation and indoor air quality.

Commercial applications

Industrial factory application for process air handling unit

Process AHU

For factories, laboratories, cleanrooms and production lines requiring tighter temperature, humidity and filtration control.

Industrial applications

Hygienic AHU

For healthcare, pharmaceutical and food-related spaces where cleanability, filtration and drainage matter.

Medical HVAC solutions

Specification Logic

Comfort AHU vs Process AHU

Many buyers looking for an air handling unit supplier actually need to know whether they are buying a comfort AHU or a process AHU.

Factor	Comfort AHU	Process AHU
Main goal	Human comfort and ventilation	Production, technical or environmental control
Humidity control	Sometimes required	Often critical
Filtration	Standard to medium grade	Medium to high grade, sometimes multi-stage
Operating hours	Building schedule	Often long hours or continuous
Applications	Offices, malls, hotels, schools	Cleanrooms, factories, labs, pharma, food, electronics

Engineering Parameters

Data Required for AHU Selection

Airflow alone is not enough. The AHU must match air volume, pressure, coil performance, filters, humidity and controls.

Airflowm3/h, CFM or air changes per hour based on room use.

ESPExternal static pressure from ducts, filters, coils and diffusers.

Fresh AirFresh air ratio changes cooling, heating and humidity loads.

CoilsChilled water, DX, hot water, steam or electric heating.

FiltersFilter grade and dirty-filter pressure drop affect fan selection.

ControlsSensors, valves, actuators, alarms and BMS communication.

Procurement Risks

Common Mistakes in AHU Projects

These issues are common when AHUs are purchased by airflow or price only.

Buying only by airflow

Same airflow can have different coil capacity, fan pressure, filtration and casing performance.

Static pressure not confirmed

If duct resistance is underestimated, the AHU may not deliver design airflow.

Humidity ignored

Temperature may look acceptable while humidity remains too high in humid climates.

Filter pressure drop ignored

Higher-grade filters reduce airflow if the fan is not selected for dirty-filter conditions.

Poor service access

Filters, coils, fans and drain pans require maintenance access.

Casing condensation

Poor insulation or leakage can cause condensation and hygiene problems.

Applications

Application-Specific AHU Recommendations

Each project type has different air treatment requirements, from quiet commercial comfort to strict process environments.

Commercial buildings: comfort, fresh air, noise and maintenance access. Industrial manufacturing: process heat, dust, humidity and continuous operation. Healthcare: filtration, hygiene, pressure relationships and cleanability. Pharmaceutical: stricter temperature, humidity and filtration control. Infrastructure: high airflow, durability and central control integration. Chilled water systems: AHUs can pair with air-cooled screw chillers.

Factory Support

Quality Control and Project Documentation

SongXin can support production inspection and documentation according to project requirements.

SongXin AHU production workshop and service support

Factory Inspection

Panel, fan, motor, coil, drain pan, filter section, electrical and packing inspection.

Engineers reviewing HVAC project documentation

Technical Submittal

General arrangement drawing, wiring diagram, component list and installation guidance.

Global logistics network for AHU shipping

Global Delivery

Export packaging, logistics coordination and shipment planning for international projects.

Send the airside data. Get an AHU configuration that fits the project.

Share airflow, external static pressure, fresh air ratio, cooling source, heating source, entering and leaving air conditions, filter grade, humidity requirement, noise limit, installation space, voltage, quantity and delivery destination.

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FAQ

Air Handling Unit Questions

What is the main function of an air handling unit?

An AHU moves and conditions air. It can filter, cool, heat, humidify, dehumidify and mix fresh air with return air before distributing air through ductwork.

What information is required to select an AHU?

The most important data includes airflow, external static pressure, fresh air ratio, cooling and heating source, entering and leaving air conditions, filter grade, humidity requirement, noise limit, voltage and installation space.

What is the difference between a comfort AHU and a process AHU?

A comfort AHU is designed mainly for occupant comfort. A process AHU is designed for industrial, technical or production environments where temperature, humidity, filtration, pressure, corrosion resistance or continuous operation may be critical.

Can an AHU include DX cooling?

Yes. A custom AHU can be designed with a direct expansion coil where chilled water is not used. DX AHU selection must match refrigerant system, airflow, coil capacity, humidity and control requirements.

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