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Five good reasons for selecting the VEX4000

There are many good reasons for choosing a VEX4000 unit for your next project. Here are just five of them.

Extremely high energy efficiency

With VEX4000, you will meet future energy requirements with a condensation efficiency level of more than 90%. Patented adaptive pressure control that reduces energy consumption compared to traditional pressure control methods. (CAV, VAV, DVC)

Reversible heat pump

VEX4000 is available with an integrated reversible heat pump. This means you get ventilation, heating and cooling in a single air handling unit; simple, reliable and highly energy-efficient.

Compact design

Compact, modular design which can even be supplied as a SPLIT solution for narrow access routes.

Simple installation

Your unit is assembled before or after delivery with assembly fittings and detailed mounting instructions. Assembling a ventilation unit has never been easier!

Easy configuration with unique design program

With EXselectPRO you can put together your own unit with the modules you need for your project. This gives you a unique product - regardless of the task in hand.

Design your ventilation system to your own specification

With capacities from 1,050 to 36,000 m³/h, you will always find a solution to suit your needs

With so many combinations, there's always a solution

The many modules in the VEX4000 series each have their own function, but can be adapted to each other. This means you can put together your own ventilation unit to fit your exact needs and wishes, while still preserving the same overall width and height. You can also choose whether your unit will be a LEFT or RIGHT version.

The modules and their functions

Read more about all the modules and the accessories available for VEX4000

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Heat pump combined with ventilation

The requirements for energy efficiency and low energy consumption for ventilation solutions have generated a lot of focus on combining heat recovery with an integrated heat pump. By combining ventilation, heating and cooling in a single air handling unit, a solution is achieved which is very energy-efficient and much simpler than traditional cooling solutions with cooling units and ducting on the roof.

With VEX4000RHP you get ...

  • heating, cooling and ventilation in a single air handling unit
  • a factory-tested air handling unit
  • advanced EXcon control system
  • no need for additional heating/cooling installations
  • quick, simple calculation, documentation and technical data via EXselectPRO
  • one supplier for the whole solution
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Here we assume that the heat pump/electric heating coil will run for half of the year at 33.3% capacity. Any extra investment in the purchase of a heat pump is therefore recouped relatively quickly. Any comparison with hot water, gas, oil or other energy source will depend on the price per kW.


– the patented solution to prevent the spread of disease through a ventilation air handling unit with rotary heat exchanger

ALC™ is a simple plug & play solution that is available for VEX4000 with rotary heat exchangers. The solution prevents leakage and thereby prevents the spread of viruses, particles and gases via the ventilation system. Enabling ALC™ prevents leakage by the VEX control system, regardless of the actual operating situation.
*) ALC - Automatic leakage control

How ALC™ works

  1. A sensor measures the pressure difference between the extract air and supply air chambers in the VEX air handling unit.
  2. The control system in the air handling unit regulates an extract air damper based on the pressure difference.
  3. This ensures that the pressure in the extract air chamber is always lower than the pressure in the supply air chamber.

The automatic leakage control reduces the transfer of exhaust air (EATR, Exhaust Air Transfer Ratio) to 0%** and eliminates recirculation of airborne particles and gases, including virus particles. ALC™ is an energy-efficient solution, since the demand-controlled operation can take place without leakage problems.


  • A simple plug & play solution that can also be retrofitted
  • Exhaust air transfer rate EATR = 0%**
  • The perfect solution for hotels, educational institutions, offices, hospitals, shopping centres, etc.
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**Tested and validated at Danish Technical University. EATR = 0% based on Eurovent "Air Leakages in Air Handling Units: Guidelines for Improving Indoor Air Quality and Correcting Performance", 2021, EN308 and EN16798-3.

– advanced control for optimum operation

The integral EXcon control system in the VEX4000 controls airflow, heating and cooling, but it is the user who determines how and when the control system will switch between the integral functions.

Integral functions in the control system

  • Night-time reduced duty
  • Alarm log and data log
  • Control using a day, week or year plan
  • Extended operation
  • External forced operation with run-on time
  • Alarm e-mail
  • Summer night cooling
  • Outdoor air temperature compensation
  • Set summer/winter operation
  • Four-zone zone control
  • Portal solution, total monitoring of up to five systems with EXcon control system

Control methods

  • Constant pressure
  • Constant airflow
  • Constant CO2
  • Fan Optimiser
  • Constant motor speed %
  • Adaptive pressure control (patented solution for energy optimisation of VAV systems)
  • External 0–10V with supply air/extract air slave
  • Constant pressure control with supply air/extract air slave
  • Three levels; low, medium and high speed/pressure/airflow

Temperature regulation

  • Constant supply air temperature
  • Constant extract air temperature
  • Constant room temperature
  • Constant difference between extract air and supply air
  • Summer and winter compensation
  • Recirculated air heating (option)
  • Summer night cooling
World-class energy efficiency with patented adaptive pressure control
43% energy savings compared to VAV
VEX4000 units are supplied with the EXcon control system, which allows the use of EXHAUSTO’s patented adaptive pressure control (aDCV). Adaptive pressure control continuously optimises pressure in the unit in relation to the requirements in the building, which reduces energy consumption compared to traditional methods for pressure regulation (CAV, VAV and DCV).

The patented Adaptive Pressure Control (aDCV) can cut energy costs by up to 43%*
* Up to 43% compared to a system with constant pressure control (VAV) (variable air volume).
Up to 20% compared to a demand driven system with constant pressure control (DCV).

Operate the system when you want, where you want

Setting and control is executed using the web server from a PC, smartphone or tablet. Network communication supports BACNet via TCP/IP and modbus via RS485 or TCP/IP. As an option, communication with LonWorks can also be supported.

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Unique project planning with EXselectPRO

Whatever your project, the VEX4000 is up to the job, and with our design program EXselectPRO, you can combine and compose the ventilation system to fit your own requirements. At the same time, the program provides you with detailed technical data, dimensional sketches and energy calculations and labels. Easily and simply!

Installation has never been easier

Once you have configured you’re VEX4000 unit, you can choose to have it delivered in three different ways.

1. The unit is supplied ready-assembled

If the unit is supplied ready-assembled, EXHAUSTO will make sure that all modules are correctly connected and assembled on the base frame.

2. Modules are supplied separately

In many cases it can be a benefit to receive the modules individually, for example if they need to be transported through doors or up stairways. For this reason, the VEX4000 has been specially designed for ease of assembly.

3. SPLIT solution

The air handling unit is supplied 'flat-packed' for assembly onsite, so even larger air handling units can be transported where access is restricted.

Certified performance

The VEX4000 series takes account of the industry's principal rules and standards.


VEX4000 is Eurovent-certified, and as part of the certification process, the data in EXselectPRO is being verified.


VEX4000 is RLT-certified, and as a part of the certification process, the data in EXselectPRO is being verified.

VDI 6022

VEX4000 has been developed in accordance with the German Hygiene Standard VDI 6022. We can provide you with advice in how to ensure there is optimal access for inspection and cleaning of your air handling unit’s sub-components and thus prevent any harmful micro-organisms occurring in the air handling unit’s airflows.

At an extra charge, you can order VEX4000 as a hygienically certified unit in accordance with VDI 6022-1.

VEX4000 - a product of experience and know-how

The VEX4000 development is based on the same knowledge and expertise in making quality products which the market has known and prized for decades.

For the more than 60 years in which EXHAUSTO has developed and produced ventilation solutions, the company has always focused on meeting on the ever tighter requirements from legislation and customers.

We have combined our know-how from the VEX100-200-300 series with the knowledge we have gained from the range of air handling units we have acquired since that time – and developed the VEX4000 series, which with a capacity range from 1,050 to 36,000 m³/h and completely unique configuration options can solve virtually all ventilation tasks within comfort ventilation.

Your ventilation expert and professional business partner

At EXHAUSTO we never compromise on quality, and since we are experts in ventilation with many years of specialised experience, you can be assured of not just the best ventilation solution but also a competent business partner.

EXHAUSTO develops and manufactures high-quality products and systems for comfort ventilation in all areas of use – from offices, shops, schools and institutions to industrial buildings, hotels and hospitals. With focus on high efficiency ratings and energy consumption that meets the future's energy requirements, EXHAUSTO is one of the absolute leaders in the field.

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