Constructora Auxiliar de Ingeniería S.L. (CAISA) is a Spanish capital company established in the year 1978, where company partners where initially the workers, as well. As of today, as the beginning partners have retired, CAISA has gone to new private partners and even new companies.

CAISA works on the study, design, construction and coordination of assembling boiler equipment for the industry, basically in the chemical industry at 60%, and other industries such as the food, agrarian and construction industries making up another 30% of invoicing all together. Diverse clients from other minority sectors make up the other 10%.

The company is located at the Polígono Industrial Can Sellares in Sant Andreu de la Barca (Barcelona) and has a 1,100 m2 warehouse for assembly.