Air control

Mechanical ventilation control

 EPG
The mechanical ventilation control can be specified here. The Ventilation control type in the top of the screen is determined based on the mechanical ventilation control. This Ventilation control type is applied in the energy performance calculation EPG.

•      No control

•      Time control without zoning

•      Time control with two or more zones,

•      CO2 control exhaust only

•      CO2 control in residential area

•      CO2-control with two or more zones,

•      CO2 control in residential area with cooker

Ventilation in night mode when warming up the building

 HL
In buildings with mechanical supply of ventilation air, the calculations can take it into account when the ventilation is in night mode when warming up the building. During this night mode the ventilation performs at 50% power in housing and it is inactive in non-residential buildings. The power required for (possibly) warming up the ventilation air has been charged already. This power is not used during heating of the building (partly for housing), therefore, it can be used to heat up the building. As a result, the required power for heating of the ventilation (partly for housing) air is subtracted from the power to be installed in the room. In heat loss calculations, it is always safer not to work with the ventilation in night mode when warming up the building.

Conditional night heating present

 BS
When conditional night heating is present; the central air installation is controlled based on the conditions in one of the rooms.  Night heating is activated if the temperature in the room is below the switching temperature. In this case the air flow is switched to the flow at conditional night heating. Conditional night heating with ventilation air is only possible if:

•      A Heating/cooling coil is present;

•      A flow rate for night mode has been specified in Ventilation;

•      The flow rate at conditional night ventilation is greater than the flow rate at (normal) night ventilation.

If conditional night heating is chosen, the heating curve for the night is applied. These heating curves, i.e. night time mode for both Distribution and Supply temperatureError! Not a valid bookmark self-reference., need to be defined.

ON when air temperature of the room <

 Standard 16 °C BS
This is the room temperature at which the air heater and ventilators are activated. Night heating will be activated when the room temperature is below this specified temperature. This is also called the activation temperature. This setting only becomes visible if conditional night heating has been chosen.

OFF when air temperature of the room >

 Standard 17 °C BS
This is the room temperature at which the air heater and ventilators are deactivated. Night heating will not be activated when the room temperature is above this specified temperature. This is also called the deactivation temperature. This setting only becomes visible if conditional night heating has been chosen.

Conditional night cooling

 BS
In this screen you can specify whether the night cooling is provided by the intake of additional air and/or by the central air cooler. The central air handling system is controlled based on the conditions in one of the rooms for conditional night cooling. The night cooling is activated when the room temperature of this room is below the switching temperature and the temperature difference (between inside and outside) is larger than specified. In this case the flow rate for conditional night cooling is applied. Conditional night cooling with ventilation air is only possible if:

•      A flow rate for night mode has been specified in the Ventilation template;

•      The flow rate at conditional night ventilation is greater than the flow rate at (normal) night ventilation.

ON when air temperature of the room >

 Standard 23 °C BS
This is the room temperature at which the air cooler and ventilators are activated. Night cooling will be activated when the room temperature is above this specified temperature. This is also called the activation temperature. This setting only becomes visible if conditional night cooling has been chosen.

And outside air temperature >

 Standard 5 °C BS
This is the outside temperature at which the air cooler and ventilators are activated. Night cooling will be activated when the outside temperature is above this specified temperature. This setting only becomes visible if conditional night cooling has been chosen.

And difference between inside and outside air temperature >

[K] Standard 5 K BS
Conditional night cooling may only be activated if the difference between the room temperature and the outside temperature is greater than a specified minimum value. The room temperature is considered at the end of the previous hour. This setting only becomes visible if conditional night cooling has been chosen.

OFF when air temperature of the room <

 Standard 18 °C BS
This is the room temperature at which the air cooler and ventilators are deactivated. Night cooling will not be activated when the room temperature is below this specified temperature. This is also called the deactivation temperature. This setting only becomes visible if conditional night heating has been chosen.