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Enter calculation values :

  Supply Extract
Airflow:  l/s  l/s

Duct pressure:

 Pa  Pa

 

Place:
 

Design temperature:  °C
Exhaust air temperature limit:  °C
Supply air target temperature :  °C
Extract air temperature:  °C

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Date:
Target:
 
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Results:

Results at the calculation point : Supply: Extract:
Fan speed: 52 % 48 %
Air flow: 40 l/s 40 l/s
Total pressure: 49 Pa 34 Pa
Air speed: 3.3 m/s 3.26 m/s
Input power: 21 W 18 W
Annual fan energy consumption 343 kWh
SFP value: 0.98 kW/(m³/s)

 
Plate heat exchanger: Supply: Extract:
Pressure drop: 43 Pa 43 Pa
Efficiency with equal airflows: 83.5 %
Supply air temperature after the heat exhanger 13.2 °C
Postheating demand at the calculation point: 134 W
Off
On
Temperature after preheating: -
Preheating power: -

 
DIVK sound values at the calculation point Lw LwA
Supply air duct: 65.9 dB 60.9 dB(A)
Extract air duct: 55.9 dB 42.7 dB(A)
Soundpressure level in the room
(10m² absorbtion LpA)
26.8 dB(A)

 

SPL-levels by the octavebands
631252505001k2k4k8kdBdB(A)
Through the casing to the room51453629151**53.530.8
Supply616057545856494165.960.9
Extract50464345403323955.942.7
* The sound level of the measurement does not exceed the background noise level

 
Calculation of annual efficiency:
Exhaust air temperature: -18.2 °C
Exhaust air temperature limit 0 °C
Air flow ratio supply / extract 1.00
Amount of energy required for ventilation: 6351 kWh
Achieved energy saving: 4904 kWh
Total energy consumption for ventilation 1447 kWh
HRV annual efficiency: 77.2 %

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Created:March 04 2021 08:41:48