Seasonal efficiency is a new way of measuring the true energy efficiency of heating and cooling devices, over the period of an entire year. This way, seasonal efficiency gives a more realistic and concrete indication of your energy bills resulting in reduction of your ecological footprint.
As the seasonal efficiency measure puts energy efficiency in a new and more complex light, manufacturers have many new concrete challenges to live up to. It pushes them to design their products to be even more energy efficient. And thus more environmentally friendly.