Grizelj d.d. consists of six departments:

-Engineering,
-Design,
-Manufacturing,
-Trade and Representation,
-Service,
-Laboratory.

Engineering office
Grizelj d.d. is engaged in the field of thermo-engergetics, gas technology, treatment and transport of drinking, industrial and waste water, environment regulation, swimming pool technology, fountain, heating and steam technology, as well as automatization, calculation, regulation, service and management of all kinds of systems that have different levels of complexity.

Design office
The purpose is to create designs for mechanical, gas and electrical installations, technical equipment and processes, electrical equipment and devices, transport and treatment of drinking, industrial and waste water, environment control, swimming pools and fountains, heating, steam and air conditioning, as well as automatization, metering, regulation, service and management of all kinds of systems that have different levels of complexity. Through the contracts with our partner companies, the design office has the support of 100 000 employees. In our work, we apply the system control of quality in agreement with the up to date European directives.

Manufacturing
We manufacture level relays, level probes, level controllers, gas infrared heaters, for which, among a high level of competition, we have received the bronze medal for quality at the international fair INTERKLIMA in Zagreb in 1995. Aside from the already mentioned, we also manufacture control, transfer, meter and signal boxes and control panels, regulation-metering stations for natural gas, fountains and equipment for fountains, swimming pools and swimming pool equipment.  

Another sector of our manufacturing department is responsible for the production of disinfection means with different concentrations depending on their purpose: health services, veterinary medicine, food industry, technical hygienic protection, and water. Necrobac® is a disinfectant which destroys bacteria, algae, and fungus. Antivirin plus® is a highly active disinfectant which is designed for extermination of 15 different families of viruses including HIV, Hepatitis A, B, C, D, and E, corona, echo, adeno, entero and coxackie viruses, as well as influenza and parainfluenza.

The activities of our daughter companies include the following:

ITG Waermetechnik Wien is manufacturing hot water boilers and gas infrared heaters.

ITG d.o.o. Sarajevo is the only manufacturer in Bosnia and Herzegovina specializing in the production of hot water boilers, expansion modules, filter split systems, heating stations, and devices for the chemical preparation of water. ITG d.o.o. Sarajevo is also representing and servicing boilers of LOOS International, a partner company from Germany. At the international fair INTERKLIMA in 2001, among international competitors, ITG boilers were chosen for the bronze medal for product quality.

Trade
The Trade Department is organized into following groups:
- representation,
- wholesale,
- consignment sales.

1. ALFA LAVAL (heat exchangers)
2. BAYER (treatment of drinking, industrial and waste water)
3. DANFOSS (heat regulation technology)
4. ENDRESS + HAUSER (regulation metering technology)
5. ELSTER – INSTROMET (gas equipment)
6. GRUNDFOS (pumps and pump systems)
7. ITG Waermetechnik (boilers and heating systems)
8. LOOS International (boilers and heating systems)
9. KSB (pumps and pump systems)
10. NEUBERGER (remote control and management)
11. OASE (pumps)
12. RITTAL (electrical steel boxes)
13. RMG (regulations metering equipment in gas technology)
14. ROBUR (gas heating and steaming)
15. VIESSMANN (boilers and heating systems)
16. VIESSMANN KAELTE (cooling cells)
17. WEISHAUPT (burners and heating systems)
18. WIKA (pressure and temperature)
19. CORONA, FONKO, HYUNDAI, WINIA, SAMPO (air conditioners)


Service
Grizelj d.d. services equipment manufactured by Grizelj d.d. and equipment from trade programs. In addition, we also offer repair of boilers using original spare parts, installation, putting in operation, and maintenance. Grizelj d.d. provides above mentioned services throughout Bosnia and Herzegovina through authorized and insured third party contractors, for products from the trade programs as well as our own products, which contributes to the quality and reliability of our offer.
Laboratory
1. Control and calibration of pressure measuring instruments, thermometers, safety valves and pressurized vessels
2. Work safety testing
2.1. Equipment and tools
2.2. Low voltage electrical installations
2.3. Lightning rod installations
2.4. Issuing certificates for work safety


Miscellaneous
Grizelj d.d. follows and selectively implements advancement in the thermo-energetic and electro-energetic field.
Therefore, Grizelj d.d. offers:
-high quality of products,
-wide range of products,
-fast delivery and
-expert service and advice.