Cooling Degree Days

Cooling degree days are defined as the difference between the daily average outside air temperature and the low limit for cooling degree days calculation CDD-01.

For cooling degree days, the macro calculates the difference between the average hourly outside air temperature and low limit value for cooling degree days. If the average outside air temperature of the current hour is higher than the room temperature setpoint, the following quantity is added to the output value "ClgDegreeDays":

(average outside air temperature of the current hour - CDD-01)/24

Limits for Degree Day Calculation

For heating degree days, the maximum outside air temperature limit, above which no heating degree day calculation will be performed, can be adjusted by parameter HDD-01.

For cooling degree days, the minimum outside air temperature limit, below which no cooling degree days calculation occurs, is defined by parameter CDD-01.