A heat recovery ventilation system for a healthy home
We spend over 80% of our time inside a building, at work or at home, and therefore the indoor air quality plays a very important role in our health. Indoor air quality is defined by several parameters, such as CO2, humidity, VOC (volatile organic compounds), formaldehyde and dust particles.
The most common method of ventilation is natural ventilation, which consists of opening windows and doors to refresh the indoor air. It is a simple method but an extensive energy consumer due to the fact that we need to heat up or cool down the air during winter, respectively summer, to bring it to the convenient comfort temperature.
We consider the heat recovery ventilation system mandatory for any building, because it ensures the necessary supply of fresh air, with a minimum energy consumption. Therefore, each NIDUS Home is equipped with such a system, either centralized (for NIDUS Condor) or decentralized (for NIDUS Dove). Moreover, the PassivHaus standard not only requires every building to have a heat recovery ventilation system installed, but also the system to have a heat exchange efficiency of at least 75%.
The heat recovery ventilation unit is a device that simultaneously introduces fresh air from the outside (e.g. at 0 °C) and evacuates the polluted air from inside (e.g. at 20 °C), exchanging heat between them, without mixing them, with an efficiency of over 75%. As a result, the fresh air gets warmed up with up to 15 °C at a very low energy consumption - 2 electric fans of 40W each.