Energy calculation

Choose air handling unit
Number of units
Comfort heater
Inlet temperature setpoint
°C

X

Inlet Temperature

The inlet temperature is by default set to 19 ºC ex-factory.
The counterflow heat exchanger is designed to deliever an inlet temperature 2-3 ºC below the room temperature at normal conditions.

Choosing a higher inlet temperature can have following consequences:
With comfort heater - Increased energy consumption.
Without comfort heater - Increased unbalanced ventilation.

Room temperature setpoint
°C

X

Room Temperature

In practice the room temperature is constantly changing, which cannot be accounted for in this calculation of the energy consumption.
The initally value of 22 ºC for the room temperature is based on an average for the room temperature during a year for institutions and offices.

Country   Weather data
 
Annual operating days
days/year
Number of operating settings

Settings

X

Settings

An operating setting consist of three inputs - an airflow, a start time, and a stop time. The external pressure is also an input if the chosen unit is DV1000.

Default setting - The default start and stop time are set to 07:00 and 17:00, respectively.

Operation during the whole day - Set start time to 00:00 and stop time to 00:00

Choose up to 3 operating settings with different airflows and start/stop times:
The operating settings are prioritised such that setting 1 overwrites setting 2 and 3, and setting 2 overwrites setting 3.

Example
Setting 1 - airflow is set to 430 m3/h and start/stop time at 7:00 and 17:00, respectively.
Setting 2 - airflow is set to 250 m3/h and start/stop time at 0:00 and 0:00, respectively.
Result - The airflow input for the calculation is 250 m3/h between 00:00 to 7:00, 430 m3/h between 7:00 to 17:00, and 250 m3/h again from 17:00 to 00:00.

m3/h
l/s

Setting 1
Airflow

X Air handling unit
The table below shows minimum and maximum airflows for the air handling units.
The maximum airflow depends on the sound level as well as the filter.
The maximum airflows, in the table below, are for ePM10 75% filters and at a sound level of 35 dB(A).
A finer filter, e.g. ePM1 55 % and ePM1 80 %, and a lower sound level, e.g. 30 dB(A), result in lower minimum and maximum airflows.
Please visit the datasheet for the chosen air handling unit for determining the maximum airflow.

AM 150 AMC 150 AM 300 AM 500 AM 800 AM 900 AM 1000 AM 1200 DV 1000
Min. airflow [m3/h] 30 50 60 100 200 200 300 300 200
Max. airflow [m3/h] 147 147 300 550 725 850 1100 1300 1150


Air handling unit with cooling module
The table below shows the minimum and maximum for air handling units with cooling modules.
The maximum airflows are reduced compared to air handling units without cooling modules due to the increased pressures induced by cooling modules.
Furthermore, the minimum airflows are increased compared to air handling units without cooling modules.
These values are the minimums for activiation of the cooling modules.
Air handling units with cooling modules do also depend on the filter. and the sound level.
Please visit the datasheet for the chosen air handling unit with cooling module for determining the maximum airflow.

AM 300 CC AM 500 CC AM 800 CC DV 1000 CC
Min. airflow [m3/h] 150 250 260 400
Max. airflow [m3/h] 260 500 650 900



m3/h
Choose start time   Choose stop time