State Of Art

Dual Zone

1000 USRTons

Maximum Energy Efficiency

Viuna products are designed by the proprietary in-house developed softwares and we simulate every stage before construction. Our R&D department also have partnership with the world’s leading engineering universities to provide our customers with the possibility of using maximum energy with extraordinary efficiency.

Customization

One of the prominent features of our products is the possibility of customizing according to the needs of the customer and the project, which can be : the dimensions of the device, the type of pipes, the type of cooling system, the number of zones, the type of electrical panel capabilities like BMS.

Unrivaled Quality

By Relying on the scientific knowledge and experience of its experts, Viuna has solved all the common problems of the previous generations of air conditioning systems and has achieved a unique quality in its products, which ensures the long life of its devices.

Why Viuna HVAC ?

With over 30 years of experience in air conditioning technology and manufacturing, Viuna HVAC still invests in research and development of new techniques and technologies for manufacturing the most efficient and eco-friendly products and continues to maintain its connections with local and international universities and laboratories. Our mission is to make HVAC products with maximum efficiency, performance, and reliability that take our customer’s experience to the next level.

Our products reduce the greenhouse effect by using less hydrocarbon fuels and electricity and are beneficial where cooling/heating demands are all year round by using diversified energy sources such as Gas, Steam and Hot water.

Compared with traditional electric chillers, Viuna Absorption chiller significantly reduces volume and weight and reduces operation costs when electrical costs are high. We also offer the most expansive absorption chiller size and model selection available in the HVAC industry; eighty sizes range from 30~2000 USRTons in Single Effect and Double Effect Models.

Our innovation in absorption chillers technologies makes us the first choice when customers want a worry-free and thoroughly engineered solution.

Viuna absorption chillers superior features

We are proud to announce the latest type of hybrid absorption chillers (SEMI AIR COOLED) using a hybrid cooling tower with the highest water saving of up to 70% compared to other evaporative cooling equipments are designed and launched by our company.

All electrical-mechanical parts and raw materials are products of the best brands in the world, that meet Viuna internal and international standards of CE, ASTM, ISOs, ASME, ASHRAE, and TUV. These include copper pipes, fire and alloy pipes and stainless steel sheets, PLCs and control equipment, fully custom pumps for absorption chillers, vacuum pumps, etc.

Learn more about Viuna absorption chillers

Solution and refrigerant low PSH canned motor pumps with filters.
Complete turnkey package including factory assembled and wired. For transportation, the control panel may be shipped separately and installed at the site. In the case of larger sizes, the unit can be broken into smaller pieces and shipped in multiple units of two or three pieces for shipment.
Upward holes spraying twin copper tubes technology, inside the absorber, evaporator, and generators, stops the perpetual concern with respect to the cooling capacity decrease generated thru clogging.
Automatic de-crystallization technology even in sudden shutdown circumstances due to electrical failure.
Automatic purging hook type system which continuously and automatically removes non-condensable gases from the shell side and stores them in a tank.The purging system vacuum pump is provided as a standard feature.
PLC-based control panel with HMI display plus user friendly interface and data logging system.
Special and most recent enhancing techniques applied to all components.
The chiller is provided with an auto-de crystallization line (overflow J-shaped pipe) with PT100 temperature sensor, protecting itself from crystallization during operation.

Sprayed twin tubes type generators for increasing the performance of the machine to reduce the size of generators and volume of the solution.
Straight tubes in the generators for easy
maintenance
Fixed and floating generator supports are utilized to control tubes bundle expansion
Carbon steel tube sheets with inner grooved holes according to TEMA standards
All tubes fitted within the tube sheets duly expanded for a tight fit in along with a sealant adhesive resistant to temperature and pressure increases where all tubes are individually accessible and replaceable from either end.
The units are supplied with one in single effect and two or three in double effect regenerative heat exchangers to increase the performance of the cycle
The heat exchangers are of shell and tube type with circular shell geometry according to TEMA standards and constructed with internally enhanced copper-nickel tubes.
All tubes fitted within the tube sheets duly expanded for a tight fit in along with a sealant adhesive resistant to temperature and pressure increases where all tubes are individually accessible and replaceable from either end.

Sight glasses are provided on the evaporator, the absorber and the generator as these glasses facilitate the monitoring of the refrigerant and the solution levels for easing inspection and maintenance operations.
Refrigerant storage box for dilution of the cycle
All the various sections of the chiller are interconnected by suitably sized seamless carbon steel piping
Sampling refrigerant and solution valves provided as standard feature
Balancing refrigerant and solution valves provided as standard feature
Optional isolation butterfly valves for refrigerant and solution pumps
Stainless steel eliminator plates between evaporators to absorbers and generators to condensers
Condenser bypass connection for necessary circumstances in reducing cooling water line pressure drop has been adapted as part of the system
The absorber to the condenser crossover piping is a standard feature for it reduces the piping work which also results in the overall reduction in the length of the unit, welding, and fabrication processes at the site
Special anti-corrosion coating on inner surfaces.

Finned Tubes Production Line

In Viuna HVAC design department heat exchangers have to face many challenges. Heat exchangers need to become more efficient and compact; they have to be energy-saving, and corrosion resistant. To achieve these goals finned tubes or tubes with enhanced surfaces are required.

Thanks to investment in the production of finned tubes and technical equipment and related scientific research in the R&D dept., we are self-sufficient in the production of finned tubes, and we can produce common and special types of fines on all tubes used in chillers or converters according to German Schmole and Wieland standards.

A few selected projects

Opal Shopping Center Burn Center Mehrad Mall Qalamchi Center Persian Park Complex Damavand Mineral Water Abadan Refinery Ministry of Social Welfare Ofogh Mall

Opal Shopping Center

Opal Shopping Center is the one of the newest modern malls of Tehran, that is located in Koohestan Blvd in Shahrak-e Gharb, north-west of the city.
The total area of this commercial center is about 130000 square meters. Opal has a total of about 450 commercial and food units.

Viuna HVAC equipped this building with three 1500 USRTons Absoprtion Chillers : two direct fired absorption chillers and one warm water absorption with CCHP cogeneration cycle.

Burn Center Hospital of Tehran

Viuna HVAC equipped this building with three 500 USRTons Double Effect Steam Fired Absoprtion Chillers.

Mehrad Shopping Mall

Mehrad Shopping Mall is located in Azimiyeh, Karaj.Viuna HVAC equipped this building with one 1000 USRTons Double Effect Steam Fired Absoprtion Chiller.