AHU ControllersOJ-Air2

More efficient, more effective and easier to handle for everyone involved

What is more, you can get everything you need from the OJ Air2 series: everything fits perfectly together.

The QuickPlug™ Modbus technology makes cabling and installation a breeze. But the Plug & Play philosophy goes further than that: With OJ Air2 controls inside, your air handling unit is in itself transformed into a single preinstalled Plug & Play-unit for remarkably easy installation on-site.

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OJ-Air2 Four decades of
providing and perfecting

At OJ Electronics, we have spent four decades providing and perfecting control for air handling units. The OJ Air2 range makes the air handling unit more efficient and easier to handle for everyone involved. The OJ Air2 range is one of our customer’s enduring favourites, and it remains as relevant as ever. The latest addition to the range is a good example: the OJ Air2 master is BACnet certified and has beed added zone control, enabling AHUs to handle four different temperature zones directly.

Simple client controller or full range technical interface

The OJ Air2 range is about choice. If customers want the full benefit of sophisticated control and simple handling, they can install the complete range in their system. But they can also scale their system to match project specifications and give clients exactly the level of functionality and control they need.

We are all about customer satisfaction!

Want customised features? Talk to us

We are always happy to create customised features for our clients, including features for private label solutions. So if you have special requirements, please do not hesitate to contact us. We can help you assess whether such customisation is feasible – and how to achieve what you want to do.

OJ-Air2Products

OJ-Air2Intuitive interface for AHU control systems

The OJ Air2 range includes two different touchscreen interfaces: the 2” HMI-20T for everyday users, and the 3.5” HMI-35T for a full range of functions.

Simple control

The compact 2” HMI-20T interface gives everyday users simple control, allowing them adjust the temperature setpoint and fan speed for the entire ventilation system via the intuitive touchscreen panel. Installation is very simple: the unit clicks in place in seconds.

The HMI-20T in brief

2” colour touchscreen
Easy QuickPlug™ Modbus installation
No DIP switch setting required
User-friendly, intuitive operation
Allows users to choose fan speed and temperature setpoint
Shows current temperature, ventilation setting and alarm

Full control – full access

The OJ-Air2-HMI-35T is a larger, more complex user interface for the OJ Air2 range. It covers the full range of functions – system configuration, set-up, maintenance and troubleshooting.

All system values can be viewed by all users, which means that passwords are only required when you want to edit the settings.

Operation is straightforward and intuitive: the menus are logical and easily navigated – and they use familiar symbols so that all users are up to speed right from the beginning.

The HMI-35T in brief

3.5” colour touch display
Easy connection and installation via Quick Plug™ Modbus
Easy mounting on the air handling unit or on a wall
Can be flush mounted in walls for a sleek finish
Very intuitive graphical interface – for easy navigation
All system values are visible to any user
Passwords only required to edit/alter settings
Full, yet simple overview of AHU components
Uses familiar symbols to ensure instant recognition

Can be combined

You can include both models in your system if you wish. For example, the simple HMI-20T interface can be installed in an office for everyday users, while an HMI-35 model is placed in a technical room where service technicians can use it to access more sophisticated options.

For more details and to download data sheets, please visit the OJ-Air2-HMI-20T product page and the OJ-Air2-HMI-35T product page.

Your OJ Electronics sales representative will be happy to supply further information. Click here to contact us.

System configuration

Choosing OJ Air2 for your air handling units gives you a wide range of control options. With OJ Air2 equipment inside, each unit that leaves your factory can be uniquely yours – adapted to your clients’ specific needs, legislative requirements, etc.

Complete control the way you want it

The OJ Air2 range is very extensive – it gives you everything you need for full AHU control. In fact, at allows you to choose between millions of possible applications. The individual pieces are obviously diverse, but still share certain characteristics – such as easy installation, much simpler cabling with QuickPlugTM Modbus technology, and intuitive operation.

Know-how createsCurious to
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- or do you have a question regarding the article ? Please don’t hesitate to contact

Jens Antonsen, Product Manager, HVAC Systems

Call Jens at +45 29 44 63 26 Reach out to Jens by Email

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