Tangra Energy Saving Ventilation Units

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Tangra History

25 years of market excellence


"TANGRA" was founded in 1989 as the successor of the 1940s company “TANGRA – Lazar Armianov” The main activity of ”TANGRA” back then was the design of HVAC installations


The founding owners’ successful journey began in a small, leased workshop, where they initially produced ventilation grilles and diffusers. Within a few years, they extended  production to cover sound attenuators,


TANGRA opened the first trade center for ventilation, heating and air-conditioning in Bulgaria. The company started also trading business and distributors’ network development.


The company designed, produced and installed specialized filtration systems for Bulgaria’s largest Nuclear Power Plant, Kozlоduy. The airflow of these systems is several million cubic meters per hour. All design



TANGRA was invited to renovate the HVAC systems in the country’s Ministerial and Government buildings.
Thanks to a very stringent financial policy and constant investment in products and new machines,


The company bought a plant and built its own first factory, warehouse, showroom and head offices near Sofia. The production list was increased to more than 30 standard


New retail outlets in Varna and Burgas were opened


The company’s QMS system achieved certification to ISO 9001. More than 100 employees worked for the company. The range of heat recovery ventilation was awarded with a gold medal at the biggest international trade fair in Bulgaria. The second production plant was finished and the subsidary company “BG Steel” was founded.



New and fully equipped warehouse was opened. Striving to keep more and more goods on stock, the company  becomes the biggest wholesaler of HVAC equipment in Bulgaria.


The first participation at an international exhibition - Mostra Convegno Expocomfort in Milano and new customers from Europe.


The world economic crisis affected the construction sector heavily in Bulgaria. TANGRA optimized the team and invested in innovations. The first pellet boilers were produced.  


The new technical catalogue with more than 80 different products for ventilation, heating and air-conditioning was presented. A software for the calculation of heat recovery ventilation was designed and uploaded for free use on TANGRA’s website. The company was invited to become a supporter of the European Federation for ventilation, heating and air conditioning.



TANGRA launched a new line of high-efficiency heat recovery units. New export partnerships with companies from Poland and Swizerland were established. The range of pellet boilers was expanded.


The air-handling units and pellet boilers produced by TANGRA were tested and certified by TUV Rheinland. TANGRA was awarded by the German-Bulgarian Chamber of Industry and Commerce for its production line of high-efficiency heat recovery ventilation.


TANGRA participated at MCE Mostra Convegno Expocomfort in Milano. More than 100sq.m. stand with air handling units, heat recovery ventilation and floor convectors.
New customers from Europe.


TANGRA finished the HVAC instalations in the first skyscraper in Bulgaria and the administrative building of Unicredit Bulbank. The skyscraper Capital Fort is 126m and with total floor area of   80000sq. m.


Company Highlights

Market Coverage

Our energy saving solutions are thrusted in more than 15 countries in Europe


Our extensive portfolio includes clients such as the Nuclear power station Kozlodouy


TANGRA’s Quality Management System is ISO 9001 certified

24/7 Support

Our engineer and support team are present to assist you with anything

Contact us

174, Europe Blvd, Sofia, Bulgaria
+359 2 925 05 99
+359 2 925 06 10
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