Lossnay Heat Recovery Ventilation from Mitsubishi Electric is revolutionising indoor air quality. While most ventilation systems are no better than opening a window letting valuable heat escape, Lossnay brings fresh filtered air in and recovers heat energy from the outgoing stale air which is then used to pre-warm (or pre-cool) the incoming fresh air. The end result is a healthier and drier indoor environment whilst maximising energy efficiencies.