The Respiro small heat recovery units are suitable for new buildings or newly renovated buildings where mould often occurs when using plastic windows. With the Respiro ventilation units there are no heat leaks when fresh cool air is supplied due to the ceramic heat exchanger. The ceramic heat exchanger has an average heat recovery efficiency of 78% and a maximum of 93%. The exchanger is equipped with a G3 class filter on both sides. The Respiro units can be installed in a wall depth of 250 - 400 mm. The Respiro 150 RD is equipped with a wireless remote control.