On the 7th and 8th of November, 2011 at the Sheraton Hotel Sofia was held a two-day forum on energy efficiency and renewable energy. The event organization were made from Bulgarian newspaper “Capital” and Bulgarian Photovoltaic Association. The event was held under the patronage of the Ministry of Regional Development and the World Trade Bank. TANGRA was partner in the conference and presented our latest concept: Energy recovered from the ventilation should be treated as a renewable energy source and analogue of heat pump installations.
According to the European Directive 2009/28/EC, aerothermal energy is a renewable energy source and in is treated with caution in many European countries.