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 |
Handler: | |
Date: | |
Target: | |
Name: | |
Street address: | |
Postcode: | |
Post office: | |
Project: | |
Positio: | |
Additional information: |
Results at the calculation point : | Supply: | Extract: |
Fan speed: | 63 % | 56 % |
Air flow: | 40 l/s | 40 l/s |
Total pressure: | 43 Pa | 42 Pa |
Air speed: | 3.3 m/s | 3.26 m/s |
Input power: | 23 W | 19 W |
Annual fan energy consumption | 366 kWh | |
SFP value: | 1.04 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: | 65.0 dB | 59.3 dB(A) |
Extract air duct: | 55.7 dB | 42.2 dB(A) |
Soundpressure level in the room (10m² absorbtion LpA) |
26.9 dB(A) |
SPL-levels by the octavebands | ||||||||||
63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | dB | dB(A) | |
Through the casing to the room | 50 | 43 | 40 | 25 | 16 | 2 | * | * | 51.7 | 30.9 |
Supply | 61 | 54 | 52 | 55 | 58 | 52 | 41 | 35 | 65.0 | 59.3 |
Extract | 46 | 46 | 45 | 39 | 41 | 29 | 14 | * | 55.7 | 42.2 |
* 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 % |