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I have a VAV-system which blows in a constant amount of air with 21°C. I would like to reduce the supply air flow rate to 60 % during night time (22.00 - 5.00). I found out that the system can just be switched ON or OFF. It is also possible to set a setback temperature during night time, but this doesn´t solve my problem. I also tried to install a second VAV-System. So that there is one system operating during the day and one system operating during the night, which blows in a smaller amount of air. However, it is just possible to install one Air loop system to one zone. Is there any possibility to install to air loop systems in one zone?

I have a VAV-system which blows in a constant amount of air with 21°C. I would like to reduce the supply air flow rate to 60 % during night time (22.00 - 5.00). I found out that the system can just be switched ON or OFF. It is also possible to set a setback temperature during night time, but this doesn´t solve my problem. I also tried to install a second VAV-System. So that there is one system operating during the day and one system operating during the night, which blows in a smaller amount of air. However, it is just possible to install one Air loop system to one zone. Is there any possibility to install to air loop systems in one zone?

I have a VAV-system which blows in a constant amount of air with 21°C. I would like to reduce the supply air flow rate to 60 % during night time (22.00 - 5.00). I found out that the system can just be switched ON or OFF. It is also possible to set a setback temperature during night time, but this doesn´t solve my problem. I also tried to install a second VAV-System. So that there is one system operating during the day and one system operating during the night, which blows in a smaller amount of air. However, it is just possible to install one Air loop system to one zone. Is there any possibility to install to two air loop systems in one zone? zone?