SDH is a Chance to Save Bulgarian Cities from the Air Pollution 

Instead of burning RDF in the very center of Sofia to generate heat energy, the Sofia Municipality can build a modern and environmentally-friendly District Heating network in all neighborhoods and districts that currently lack DH systems and where households use coal/wood burners for heating their homes. The projected municipal long-term debt of €67 million that Sofia Municipality intends to take to build a “cogeneration plant in Sofia with RDF waste utilization” can actually be invested in Solar District Heating. This kind of energy source provides household heating through the energy of the Sun. Therefore, SDH are completely ecological they do not emit neither carbon emissions nor particulate matter in the air.


The proposal was addressed to the Sofia Municipality by the Institute for Zuclear Energy Buildings (IZEB).


The modern SDH solutions are ecological and sustainable and can save all the Bulgarian cities from the air pollution due to domestic heating. SDH systems are able to eliminate harmful gases and particulate matter that are typical air pollutant when burning of low-grade coal, damp wood, and non-combustible raw materials such as automobile tires, clothing, etc.


The current DH technologies are based on natural sources of energy: sun, earth, biomass. They are an effective solution to tackle air pollution from domestic heating - on a big scale and in the long term. Also a DH system nas a strong social impact - stable energy prices, security of the energy supplies and energy independence at local and regional level.


It is imperative to introduce the topic into the agenda of the Bulgarian municipalities and all the responsible institutions, given the fact that the European Comission already started an infringement procedure in the EU Court against Bulgaria - due to the unfulfilled obligations regarding the quality of the atmospheric air.


4th International Solar District Heating Conference


Right on time for the opening of the 4th International Solar District Heating Conference in Billund, the host country Denmark reached a magical barrier: more than one Million square meters solar collectors are now installed there. The Danish District Heating Association counted exactly 1 003 024 square meters at the beginning of the Conference on Wednesday, 21st September, in a total of 85 district heating networks supported by solar thermal energy.

180 international experts from 20 countries – also this is a record number – have met for the 4th International Solar District Heating Conference in order to benefit from the experience of this leading country. They were not only impressed by the top-class presentations and technical tours to some of the world largest solar collector plants, but could also admire a reduced-scale model of such a plant in Legoland Billund, where the Conference took place. This solar collector plant made in Lego bricks represents the plant from Braedstrup, with which the world-wide unique boom of the Danish XXL solar thermal plants began, approximately ten years ago.  

Large-scale solar thermal plants can compete today with all forms of fossil fuels. The sector reaches heat prices from 3 to 5 cents pro kWh, provided that the plant is large enough. And they are always getting larger: in Silkeborg in Central Denmark the new record plant is currently under construction with 156 000 m² and a nominal power of 110 Megawatt. But the world’s market leader Denmark is not the only country in which solar thermal plants in such dimensions are developing. In the Austrian city of Graz, plans are being made for a plant of even more impressive dimensions: 450 000 m² solar thermal collectors should supply the district heating network of the second largest city of the Alpine Republic to cover 20% of the heat demand. 
Supported by:

EEA project

IZEB completed promotional project for introducing SDH technology in Bulgaria under EAA grants. 

First in Bulgaria SDH conference was held in Sopharma Towers, Sofia with presentation from Mr. Leo Holm from ARCON-SUNMARK. 


More info: http://www.sdh.bg/


IZEB consultancy for energy autonomus residential complex

Сглобяеми къщи от професионалистиIZEB was resently comissioned by private developer Sweet Home to perform a feasibility study for development of and energy autonomus residential complex near Sofia. The team from the Institute will create technological solution for achieving energy independancy of single family households. Expect more info coming soon!


IZEB is promoting solar district heating in Bulgaria

Institute of Zero Energy Buildings started reasearch and promoting  program  of  solar district heating. New generation district heating systems on Balkans is a crutial solution for large scale sustainable heating in the near future. It is interconnected with the energy systems of Zero energy buildings and building renovation processes. Supported from  State of Green  we visited the most amasing solar based heating plants in Europe. IZEB is initating several SDH pilot projecs proposals in Bulgaria and Macedonia. More info soon.


IZEB signed memorandum of collaboration with EVIC

IZEB signed a memorandum of collaboration with Electric Vehicles Industrial Cluster.

EVIC is the unique professional organization in Bulgaria, operating in the field of electric mobility.
The cluster participates in expert level in directions like - strategic developments, technological developments, changes in regulations, higher and vocational education and training, connection  with the central and local governments, etc.
EVIC initiated the creation of the ''National Programme for electric mobility - Bulgaria 2025''

Zero Energy Buildings and Electric Vehicles are in synergy: on level of electricity exchange, building design and even urban design. Long therm envisages for the future living areas must develop future buildings and mobility together.

IZEB and EVIC are going to promote and research synergetic development of buildings and electric mobility in the next decades.


IZEB in Qatar

Institute for Zero Energy Buildings took part in the business delegation of the president Plevneliev in Qatar.


ZEB1 - Pilot project for energy autonomy building

Goal: 100% energy independancy

System: PVT facades + seasonal heat storage + low temperature engine

Status: technical design

More info: soon!


European Nearly Zero Energy Buildings Conference