How to model walk in cooler, freezer or cold room (Simple HVAC)

It is possible to model freezer zones in DesignBuilder, but it is important to ensure that the temperature of the supply air is set to a very low value to cool the air below zero.

If you are using Simple HVAC then take these steps:

- Reduce the cooling supply air temperature in the Cooling design calculation options to -99°C.
- Reduce the supply air temperature under Cooling on the HVAC tab in the freezer zones to -99°C.
- Switch off Heating on the HVAC tab.
- Switch off Mechanical ventilation on the HVAC tab.
- On the Activity tab under the Environmental Control header, set the cooling setpoint and setback temperatures to the required freezer zone air temperature.
- Set the cooling operation schedule to 'On' at the HVAC tab so that it always operates.

Note: You will need DesignBuilder version 7.1 to allow you to set negative room temperatures at the HVAC tab.
For earlier versions, you will need to create a copy of the HVAC template, set up the negative temperatures, and apply the new HVAC template.