Founded in 1992, Trichkov - I.D.L. Private Co. specializes in heat engineering services. Heating substations - construction and contract maintenance.

Kovex Ltd. was established in 1993 and performs engineering in air conditioning, solar technology and air-purification. It offers delivery, installation and service of solar collectors.

Gas and heating systems. Cast-iron and steel boilers for naphtha, gas, solid fuel. Burners, gas appliances.

Item Engineering Ltd. is a leading company in the field of heat engineering. It offers consulting, design-build and complete engineering services.

Supply and installaton of air-conditioning equipment; Repairs of refrigerating and air-conditioning equipment.

Bulclima Ltd. specialises in the distribution of air-conditioning equipment. Exclusive importer and distributor in Bulgaria for GENERAL/Fudjitsu General Ltd., Japan; EXCEL; ORANGE SOLAR SYSTEM.

Solkav Bulgaria Ltd. specializes in designing, delivering and installing heating and air-conditioning systems. Solkav has more than 20 years' experience and 10 000 installations in Europe.

Trade office and service centre for delivery, installation and maintenance of the full range of air-conditioning, refrigerating and ventilating equipment for home, office, hotel and industrial uses.

Milchev Sin Ltd. offers high-quality air conditioning systems as well as construction of heating and ventilation installations, DSC security systems.

Energoconsult-SR designs and installs heating and plumbing installations, building automation systems, eco-friendly technologies using renewable energy sources.

Heating, air conditioning, ventilation, plumbing, sanitary plumbing, gas and solar installations – engineering design and building. ISO 9001:2000 certified.

New build projects and reconstruction. Construction investing and engineering. Delivery and installation of solar collectors. Real estate.

Industrial and commercial plastic products. The company's factory is located in the town of Pravets.

Total Therm Ltd. offers its customers a wide range of components for heating, plumbing, air conditioning and electrical wiring installations.

Business & Contracting Commerce imports water and heat metering systems, gas meters, electric heating units, steel boilers and others.

Trade, engineering, design, supply and installation of equipment for heating, ventilation, air conditioning, plumbing and gas installations.

Nora-Gas offers complete engineering services in the field of heating, ventilating, air conditioning and gas supply.

Argogroup Exact Ltd. is a modern construction company with an excellent material base, highly qualified experts and more than 490 experienced employees.

Selection Hold is a leader in the field of high technologies for utilizing environment-friendly energy from renewable energy sources - solar, geothermal, energy of the earth core, water and wind.

Established in 1993, Apex Solar Ltd. is a leader in the field of sun energy utilization in Bulgaria. Solar heating systems, solar collectors.