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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: 43 % 41 %
Air flow: 70 l/s 70 l/s
Total pressure: 20 Pa 20 Pa
Air speed: 1.4 m/s 1.43 m/s
Input power: 33 W 29 W
Annual fan energy consumption 541 kWh
SFP value: 0.88 kW/(m³/s)

 
Plate heat exchanger: Supply: Extract:
Pressure drop: 47 Pa 47 Pa
Efficiency with equal airflows: 81.9 %
Supply air temperature after the heat exhanger 12.5 °C
Postheating demand at the calculation point: 298 W
Off
On
Temperature after preheating: -
Preheating power: -

 
DIVK sound values at the calculation point Lw LwA
Supply air duct: 57.6 dB 50.5 dB(A)
Extract air duct: 50.5 dB 37.8 dB(A)
Soundpressure level in the room
(10m² absorbtion LpA)
27.8 dB(A)

 

SPL-levels by the octavebands
631252505001k2k4k8kdBdB(A)
Through the casing to the room52443630269**53.831.8
Supply454343504744362457.650.5
Extract40393938333021450.537.8
* The sound level of the measurement does not exceed the background noise level

 
Calculation of annual efficiency:
Exhaust air temperature: -17.5 °C
Exhaust air temperature limit 0 °C
Air flow ratio supply / extract 1.00
Amount of energy required for ventilation: 11115 kWh
Achieved energy saving: 8466 kWh
Total energy consumption for ventilation 2649 kWh
HRV annual efficiency: 76.2 %

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Created:October 04 2023 14:55:41