Annual efficiency calculator
Select the unit model:
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 |
Enter the target information:
| Handler: | |
| Date: | |
| Target: | |
| Name: | |
| Street address: | |
| Postcode: | |
| Post office: | |
| Project: | |
| Positio: | |
| Additional information: | |
Results:
| Results at the calculation point : | Supply: | Extract: |
| Fan speed: | 45 % | 43 % |
| Air flow: | 40 l/s | 40 l/s |
| Total pressure: | 37 Pa | 43 Pa |
| Air speed: | 3.3 m/s | 3.26 m/s |
| Input power: | 17 W | 16 W |
| Annual fan energy consumption | 289 kWh | |
| SFP value: | 0.82 kW/(m³/s) | |
| Plate heat exchanger: | Supply: | Extract: |
| Pressure drop: | 36 Pa | 36 Pa |
| Efficiency with equal airflows: | 84.4 % | |
| Supply air temperature after the heat exhanger | 13.7 °C | |
| Postheating demand at the calculation point: | 113 W | |
| Off | ||
| On | ||
| Temperature after preheating: | - | |
| Preheating power: | - | |
| DIVK sound values at the calculation point | Lw | LwA |
| Supply air duct: | 60.0 dB | 51.9 dB(A) |
| Extract air duct: | 52.6 dB | 31.6 dB(A) |
| Soundpressure level in the room (10m² absorbtion LpA) |
24.0 dB(A) | |
| SPL-levels by the octavebands | ||||||||||
| 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | dB | dB(A) | |
| Through the casing to the room | 45 | 40 | 35 | 21 | 19 | 12 | 9 | 0 | 53.3 | 28.0 |
| Supply | 56 | 55 | 46 | 47 | 47 | 47 | 41 | 31 | 60.0 | 51.9 |
| Extract | 35 | 43 | 37 | 26 | 29 | 20 | 13 | 2 | 52.6 | 31.6 |
| * The sound level of the measurement does not exceed the background noise level | ||||||||||
| Calculation of annual efficiency: | ||
| Exhaust air temperature: | -18.7 °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: | 4940 kWh | |
| Total energy consumption for ventilation | 1411 kWh | |
| HRV annual efficiency: | 77.8 % | |