Sopharma Business Towers, an office development in Bulgaria's capital Sofia, has completed its eco facade, the Sopharma Properties company has announced.

The hi-tech eco facade of Sopharma Business Towars is a revolutionary technology in the construction of sustainable and energy efficient Class A office buildings; it is a combination of solar panels, glass and cladding panels allowing the buildings to use the energy from the sun and the natural environment.

"We are very glad that the facade of the two towers has been completed. With its notable architecture, Sopharma Business Towers is a unique development in Bulgaria precisely because of its last generation "double screen" glass facade specially designed for it by Koester Lichtplanung, Germany, and Reynaers, Belgium," explained Boris Borisov, CEO of Sopharma Properties.

The eco facade of Sopharma Business Towers has an all-out area of 10 000 square meters. The installment of the facade started in November 2010 but progressed with a varying speed depending on the weather.

Sopharma Business Towers has focused on using natural light – which will be available 82% of the working time throughout the year. Even in the event of a cloudy whether, the natural light available inside is 800 lux with 500 lux needed.

The flexible facade concept is designed to provide for a very high energy efficiency and substantial savings from heating, lighting, and air conditioning. The carbon emissions savings will be about 1000 tons annually.

In addition to being energy efficient, the eco facade is soundproof. Sopharma Business Towers has a grass roof of 7 decares.

The eco facade will be cleaned with special cranes installed on the sides of the building, and are available for the first time in Bulgaria. The entire facade will be cleaned by two people for two days.

Sopharma Properties is a subsidiary of the largest Bulgarian producer of pharmaceuticals Sopharma; it specializes in commercial, office, and residential real estate.