Airflow can either be extracted from a seperate roof fan, or via by-pass from the AHU (selected models). In both cases without heat recovery.
*) Additional accessories may be needed
Central = DCV with one sensor
Local = DCV with more than one
Svensk ventilation V-skrift 1995:1 (rev 2000)
Heating the supply air is energy consumption consumed when supply air is heated to +21°C degrees.
Warming of infiltrated air is energy consumption consumed when leakage air (outdoor air coming inside from cracks etc.) is heated to +21°C
The part of the annual energy that the unit recovers up to room temperature +21°C
The part of the annual energy that the unit recovers up to selected supply air temperature
Heat exchanger efficiency according to SFS-EN308
SFS-EN13141-7 (including fans)
Calculations are done according Finnish national building regulations part D3, D5:2012 and annex 122 by The Ministry of Environment