Modern building are now built with high levels of insulation and air tightness due to the focus on energy saving, privacy and noise suppression. But this in turn leads to difficulties: tight insulation means that the supply of fresh air is drastically reduced and indoor air becomes stagnant and heavy.
The obvious answer is ventilation but this is accompanied by the expulsion of air-conditioned load along with stale air. Ventilation is thus linked with energy loss and increased costs. Mitsubishi Electric's Lossnay concept addresses these problems: Lossnay ventilators use highly efficient heat recovery techniques to simultaneously expel stale air while providing a fresh forced air supply with little change in temperature.
The result is superbly sustained interior comfort.