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Hi, I have to model an office building served by an air-to water heat pump that provides heating cooling and domestic hot water to the building with the detailed HVAC. The purpose is to investigate LEED credit on energy performance. First, I had problems in finding a single system in DesignBuilder and I ended up modeling separate Heat Pump Heating, HeatbPump Cooling and DHW loop water heater. Anyway, the main problem is that I cannot manage to reduce the number of hours heating load not met. Even if I significantly increase the Heat Pump Heating power capacity, nothing changes. Can someone give an advice on how to handle this issue? Thanks in advance.

Hi, I have to model an office building served by an air-to water heat pump that provides heating cooling and domestic hot water to the building with the detailed HVAC. The purpose is to investigate LEED credit on energy performance. First, I had problems in finding a single system in DesignBuilder and I ended up modeling separate Heat Pump Heating, HeatbPump Cooling and DHW loop water heater. Anyway, the main problem is that I cannot manage to reduce the number of hours heating load not met. Even if I significantly increase the Heat Pump Heating power capacity, nothing changes. Can someone give an advice on how to handle this issue? Thanks in advance.

Hi, I have to model an office building served by an air-to water heat pump that provides heating cooling and domestic hot water to the building with the detailed HVAC. The purpose is to investigate LEED credit on energy performance. First, I had problems in finding a single system in DesignBuilder and I ended up modeling separate Heat Pump Heating, HeatbPump Cooling and DHW loop water heater. Anyway, the main problem is that I cannot manage to reduce the number of hours heating load not met. Even if I significantly increase the Heat Pump Heating power capacity, nothing changes. Can someone give an advice on how to handle this issue? Thanks in advance.