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My building gas operable windows and single zone split HVAC for heating and cooling. I have set up a Aitflow Network in energyplus to find out how matural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happing while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

My building gas has operable windows and several single zone split HVAC for heating and cooling. cooling (ZoneHVAC:IdealLoadAirSystem). I have set up a Aitflow Network in energyplus to find out how matural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happing while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

My building has operable windows and several single zone split HVAC for heating and cooling (ZoneHVAC:IdealLoadAirSystem). cooling. I have set up a Aitflow Airflow Network in energyplus to find out how matural natural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happing happening while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

My building has operable windows and single zone split HVAC for heating and cooling. I have set up a Airflow Network in energyplus to find out how natural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happening while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

My building has operable windows and single zone split HVAC for heating and cooling. I have set up a Airflow Network in energyplus to find out how natural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happening while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

I found this information in energyplus documentation (but not sure which HVAC system does it mean): The AirflowNetwork model is currently able to model a wide range of multizone air flow scenarios. However, only a single air distribution system with a constant volume supply fan can be included as part of the airflow modeling.

My building has operable windows and single zone split HVAC for heating and cooling. I have set up a Airflow Network in energyplus to find out how natural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happening while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

I found this information in energyplus documentation (but not sure which HVAC system does it mean): The AirflowNetwork model is currently able to model a wide range of multizone air flow scenarios. However, only a single air distribution system with a constant volume supply fan can be included as part of the airflow modeling.

@MJWitte or @Archmage, could you, please give me some insight view on the compatibility of air flow network and HVAC objetcs. Actually, I was thinking to use ideal loads because I am not interested in HVAC details.

The objective of my simulation is to find out best passive design strategies to reduce heating and cooling loads. My location is in Nepal and I have no data about actual infiltration rates, etc. I am doing parametric analysis with jEPlus; so I run a high number of simulations.

My building has operable windows and single zone split HVAC for heating and cooling. I have set up a Airflow Network in energyplus to find out how natural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happening while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

I found this information in energyplus documentation (but not sure which HVAC system does it mean): The AirflowNetwork model is currently able to model a wide range of multizone air flow scenarios. However, only a single air distribution system with a constant volume supply fan can be included as part of the airflow modeling.

@MJWitte or @Archmage, could you, please give me some insight view on the compatibility of air flow network and HVAC objetcs. Actually, I was thinking to use ideal loads because I am not interested in HVAC details.

The objective of my simulation is to find out best passive design strategies to reduce heating and cooling loads. My location is in Nepal and I have no data about actual infiltration rates, etc. I am doing parametric analysis with jEPlus; so I run a high number of simulations.

My building has operable windows and single zone split HVAC for heating and cooling. I have set up a Airflow Network in energyplus to find out how natural ventilation can contribute to lower cooling loads. (Location: mixed humid climate and mixed dry climate, ASHRAE 4A and 4B).

However, I get strange results for the winter period because natural ventilation is happening while heating is ON.

What is the right approach to avoid this? Might it be that the IdealLoadAirSystem is not interacting correctly with the AirFlowNetwork Model. Or should I set up a schedule to avoid ventilation in winter nights?

I found this information in energyplus documentation (but not sure which HVAC system does it mean): The AirflowNetwork model is currently able to model a wide range of multizone air flow scenarios. However, only a single air distribution system with a constant volume supply fan can be included as part of the airflow modeling.

@MJWitte or @Archmage, could you, please give me some insight view on the compatibility of air flow network and HVAC objetcs. Actually, I was thinking to use ideal loads because I am not interested in HVAC details.

The objective of my simulation is to find out best passive design strategies to reduce heating and cooling loads. My location is in Nepal and I have no data about actual infiltration rates, etc. I am doing parametric analysis with jEPlus; so I run a high number of simulations.