What part of the air does the AHU, MAU and circulating unit handle respectively?

AHU is the general name for air handling units. MAU emphasizes the task of supplementing air, and the circulation unit emphasizes the processing of reused air. They are not devices that can only be selected from three, nor can the complete configuration be judged just by the abbreviation; the same project can be set up with both fresh air treatment and circulation treatment.

Identify roles with air sources and delivery tasks

First look at whether the equipment handles outdoor fresh air, return air or mixed air, and then look at whether it is delivered to the air supply duct, mezzanine or another unit. The source, status and destination of each device can be marked on the system diagram to avoid adding the fresh air volume and circulation volume as outdoor air volume for repeated processing by the unit.

AHU is a general equipment name, and the actual tasks are determined by the system design and configuration; the MAU handles supplementary air as designed, with ventilation and exhaust balance; the circulation unit handles recycle air and the indoor load distributed by design. The three types of roles correspond to different air sources and tasks, and cannot be understood just by their abbreviations. How to calculate the fresh air volume and total air supply volume of the air conditioning box separately? Please refer toHow to calculate the fresh air volume and total air supply volume of the air conditioning box separately?。

AHU is the general name for air handling unit

AHU is an air handling unit, which is a general term that can handle fresh air, return air or mixed air. The specific tasks are determined by the system design and the equipped functional sections. AHU can take on tasks such as filtration, cooling, heating, humidification and air supply, or only some of them. You cannot judge whether it handles fresh air or return air just by the name 'AHU'.

What is an air conditioning box and what tasks does it undertake? Please refer toWhat is an air conditioning box? What tasks are performed in the air handling system? . How to determine the order of function segments, please refer toOn what basis should the sequence of functional sections of the air conditioning box be determined?。

MAU emphasizes supplemental air mission

MAU is the fresh air handling unit, which emphasizes the processing of supplementary air. It usually takes air from the outdoors and sends it to the clean room or air conditioning system after filtering, cooling, heating, humidification, etc. to supplement the fresh air required for process exhaust, personnel fresh air and pressure difference maintenance. MAU air volume is not equal to the total circulating air volume in the clean room.

How the fresh air tasks of the clean room MAU correspond to the process exhaust air, please refer toHow does the fresh air task of the clean room MAU correspond to the process exhaust? . Whether the chemical filter section needs to be re-selected when the fresh air volume changes seasonally, please refer toDoes the chemical filter section need to be reselected when the fresh air volume changes seasonally?。

Circulation unit emphasizes the treatment of recycled air

The circulation unit processes the air returned from the service area and is responsible for indoor sensible heat, moisture load and circulating air supply. The circulation unit usually cooperates with the MAU. The MAU is responsible for fresh air, and the circulation unit is responsible for return air treatment and circulation. The air volume of the circulation unit is usually greater than the fresh air volume.

Circulating air handling units should be selected according to which indoor loads, please refer toWhat indoor loads should the circulating air handling unit be selected based on? . How to consider the incorporation of MAU fresh air into the air inlet status of the circulating unit, please refer toHow to consider the incorporation of MAU fresh air into the air inlet status of the circulating unit?。

Three types of equipment can be set up in the same project at the same time

Large clean room projects may be equipped with MAU, circulation unit and terminal FFU at the same time. The MAU handles fresh air, the circulation unit handles return air and bears the indoor load, and the FFU handles terminal circulation and particle filtration. The three have different divisions of labor and cannot replace each other, nor can the air volumes of the three be simply added up as the fresh air volume.

Clean air supply package can be combinedFFU fan filter unit andthe fan filter unit at the EFU equipment end . Check Multiple devices can be linked together to understandFFU computer group control system .Supporting method of

The same product name still needs to check the function list

Two devices with the same name MAU may have different cooling, humidification and filtration configurations. The abbreviation can only help to understand the role. Selection and purchase still depend on the air inlet and outlet status, air volume pressure and interface. It is not appropriate to directly copy the parameters of other projects by alphabetical name.

What project information should be prepared before selecting the air-conditioning box? Please refer toWhat project information should be prepared before selecting an air-conditioning box? . What are the differences between static pressure, total pressure and static pressure outside the air conditioner box? Please refer toWhat is the difference between static pressure, total pressure and static pressure outside the air conditioner box?。

Aili industrial supporting equipment

Aili industrial supporting communication can start from the system role. After clarifying the air tasks, the specific supply configuration of motors, fans, filtration, structure and control can be implemented. Aili's industrial manufacturing end covers independent R&D and production of motors and fans, control systems, sheet metal, air filters and complete machine assembly. The interfaces and operating points of AHU, MAU, circulation units and terminal FFU can be matched in the same package.

Product form can be viewedAir handling unit andFan box page; clean air supply package can be combinedFFU fan filter unit andEFU equipment end fan filter unit verification; terminal particle filtration can be combinedHEPA/ULPA filter confirmation; when it comes to gaseous pollution control, you can communicate separatelyChemical filter solutions. The specific equipment role, configuration and delivery scope still need to be verified based on the corresponding configuration data and on-site working conditions. The actual effect is subject to on-site air volume balance and performance test results.

Submit project parameters:https://ailigy.com/contactus.html

Related questions and answers

Are AHU and MAU the same thing?
Not exactly. AHU is the general name of air handling unit, and MAU emphasizes the task of fresh air treatment. AHUs can handle fresh air, return air, or mixed air, and MAUs typically handle makeup air.

Can the circulation unit be responsible for fresh air treatment?
Usually not assumed. The circulation unit mainly handles return air, and fresh air treatment requires MAU or a special air-conditioning box.

What equipment roles can Aili Industrial provide?
Air handling units, MAUs, circulation units, FFU, EFU and other supporting packages can be provided. The specific roles and configurations need to be confirmed based on the system design and site conditions.

Related articles

1. How to calculate the fresh air volume and total air supply volume of the air conditioning box separately?

2. How does the fresh air task of the clean room MAU correspond to the process exhaust?

3. What indoor loads should the circulating air handling unit be selected based on?

4. How to consider the incorporation of MAU fresh air into the air inlet status of the circulating unit?

Key points for selection and acceptance inspection