| Unit of measurement | Hybrid ERV R S21 | |||
| Connected air duct size | mm | 125 | ||
| Minimum supply voltage | V | 230 | ||
| Maximum supply voltage | V | 230 | ||
| Power supply frequency | Hz | 50/60 | ||
| Rated power | W | 58 | ||
| Unit current | A | 0.5 | ||
| Maximum airflow | m3/h | 60 | 90 | 160 |
| Sound pressure level LpA at 3 m | dB(A) | 33 | ||
| Sound pressure level LpA at 1 m | dB(A) | 42 | ||
| Heat recovery efficiency, max | % | 89 | ||
| Heat exchanger type | - | Counter flow | ||
| Heat exchanger material | - | Enthalpy | ||
| Weight | kg | 31 | ||
| Transported air temperature (max) | °С | 40 | ||
| Transported air temperature (min) | °С | -25 | ||