ALC™ - automatic leakage control for VEX200 and VEX4000


Patented solution prevents the spread of viruses via the air handling unit


ALC™, Automatic Leakage Control

What leakage?

In all systems with rotary heat exchangers there is a risk that a small amount of contaminated air remains in the ducts and will be mixed up with the clean air when the rotor channels rotate from the polluted airflow to the clean airflow. The leakage problem worsens if there is excess pressure in the contaminated air-string.  

This leakage can be prevented!

EXHAUSTO’s patented automatic leakage control (ALC™) is a simple plug & a play solution that is available for VEX200 and VEX4000 with rotary heat exchangers. The solution prevents leakage and thereby prevents the spread of viruses, particles and gases via the ventilation system. Activating ALC prevent leakage using the VEX control system, regardless of the actual operating situation.

ALC™ continuously measures and controls the pressure difference between supply airflow and extract airflow to ensure that no contaminated air is recirculated to the clean air in the air handling unit. ALC reduces the transfer of exhaust air (EATR, Exhaust Air Transfer Ratio) to 0%* and eliminates recirculation of airborne particles and gases, including virus particles. 

Automatic leak control is especially important for preventing the spread of small particles through the ventilation system by making airflows and is recommended therefore for buildings where there is a desire to achieve energy savings by using demand-controlled ventilation. 

* 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.

See how ALC functions in an operating VEX air handling unit

The struggle to maintain a good indoor climate

A ventilation system is already a good weapon in the fight towards maintaining a good indoor climate. With a correct and sufficient air exchange, the system helps to ensure that the air is replaced so that viruses, particles and gases are reduced. 

This correct and sufficient air exchange can for VEX200 and VEX4000 with rotary heat exchange be ensured by choosing the air handling unit with ALC™.

Learn more about VEX200 and VEX4000 with ALC™ here


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