"TANGRA" Ltd is a private company established in 1989 and specialized in the field of ventilation, air-conditioning and heating equipment.Today we have own designer bureau, two industrial enterprises, commercial consultative center in Sofia, commercial consultative offices in Varna and Bourgas and wide distributors network in the country.

Designing and constructing: A team of highly qualified specialists is in charge of working out of the design materials, constructing and introducing of the new products. In aid of them is well appointed aerodynamic laboratory.

Industrial activity: The industrial enterprises are built beside the commercial consultative center and the main office of the company. There are detached industrial units for:
 - Ventilation grilles;
 - Air duct elements and systems;
 - Fans and ventilation equipment;
 - Air handling units and heat recovery units;
 - Lazer and plasma cutting and metal sheet working;
 - Electrostatic painting.
 The equipment is precise and highly productive, which allows maintaining excellent quality and reasonable prices.

Installation activity: There are posts detached, specialized in installation of:
 - Ventilation systems;
 - Air-conditioning installations;
 - Service.