The new Hybrid VRF system from Mitsubishi Electric cuts energy costs in half by simultaneously heating and cooling. Using advanced heat recovery technology, the Mitsubishi City Multi Hybrid VRF saves energy by redirecting the heat captured during the cooling process to areas requiring heating, such as hot water tanks. 

Heat Recovery = Less Refrigerant
The advanced two-pipe heat recovery technology uses refrigerant only between the outdoor units and the patented Hybrid Branch Circuit (HBC) controller, while water replaces refrigerant between the HBC and the indoor units. This reduces exposure risk to harmful refrigerants in occupied spaces by 30% and complies with international legislation and environmental trends. 

Offering increased energy efficiency, the patented Hybrid Branch Circuit (HBC) controller allows heat exchange between refrigerant and water, transferring energy around the building using a pair of water pipes connected to each indoor unit to supply hot or cold water. In fact, the Mitsubishi City Multi Hybrid VRF is up to three times more efficient than a traditional geyser as 1KW of power produces up to 3KW of heating capacity!

Simply put, the HBC intuitively directs the necessary energy to areas requiring heating or those which require cooling, using water rather than refrigerant.

Flexible installation with fewer resources
Flexible to design and install with fewer pipes and units than traditional HVAC, the new hybrid system offers the same control and network of a Variable Refrigerant Flow (VRF) combined with the added benefits of a chiller system - heat one room up to 30 degrees Celsius, whilst chilling another down to 14 degrees. The heat exchange process simultaneously heats water up to 70 degrees or chills it down to 10 degrees.

Classic aircons

The 2-pipe Heat Recovery System does not require an external pump and control panel usually necessary for chillers. All valves, pumps and heat exchangers are contained within the HBC.

The system monitors high pressure, low pressure and the heat exchanger mode to set an appropriate compressor frequency. Water flow from the indoor unit is automatically adjusted by the temperature difference between inlet and outlet, based on required temperature settings, thereby ensuring no energy is wasted.

The decentralised system means phased installation is possible with the same high levels of seasonal efficiency expected from VRF. This reduces the resources required for installation whilst ensuring a comfortable environment during the retrofit.

Less refrigerant = less greenhouse gas = reduced leak detection = increased occupant safety 
HVRF is ideal for applications where individual control settings or simultaneous heating and cooling such as hotel rooms, hospitals, offices and schools is required, or limitations on refrigerants and occupant safety restrictions are imposed.

With the use of centralised control, HVRF is well suited to buildings that require individual temperature settings - from operating theatres to wards and consulting rooms, server rooms to boardrooms, hotel rooms to kitchens, clubhouses to gyms and changerooms.  

Since the indoor units are water-based, they provide low noise levels whilst providing comfortable and efficient temperature control with variable airflow. Less refrigerants in occupied spaces reduces the need for expensive leak detection systems and ongoing maintenance. 

In addition, by using less refrigerant in the total system, the Mitsubishi City Multi HVRF system also minimises rising SGG (Synthetic Greenhouse Gas) or Emissions Trading Scheme (ETS) levies which increase the cost of refrigerants used in commercial airconditioning systems. 

Mitsubishi Electric Changes Name of DeLclima to MELCO Hydronics and IT Cooling

TOKYO, March 22, 2016 - Mitsubishi Electric Corporation (TOKYO: 6503) announced today that DeLclima S.p.A., which Mitsubishi Electric achieved 100-percent ownership of on February 24, was renamed MELCO Hydronics & IT Cooling S.p.A., effective March 15.

The name change, which clearly declares the company's mission, also signifies to employees, customers and suppliers that the company has become an integral and valued part of the Mitsubishi Electric Group. Mitsubishi Electric aims to swiftly realize synergies and strengthen its commercial heating, ventilation and air conditioning (HVAC) business globally.

The acquisition of DeLclima represents Mitsubishi Electric's full-scale entry into the chiller1 business and will enable the company to further expand its business portfolio, which will be important in achieving continuous growth and increasing market presence. The acquisition will also allow Mitsubishi Electric to adequately respond to environmental regulations (F-Gas regulations2), which are expected to increasingly impact business practices in the coming years.

Mitsubishi Electric has a global presence in the area of heating, ventilation and air conditioning (HVAC) systems in markets such as Japan, Europe, North America, China, Southeast Asia, India and Australia. Europe in particular is an important market for Mitsubishi Electric after Japan. As the European air conditioning market matures, it further requires market players both to provide value-added products such as energy-saving products and to comply with environmental regulations, and in response, Mitsubishi Electric is growing its business in the region with a particular focus on room and packaged air conditioning as well as multi air conditioning systems for buildings.


About MELCO Hydronics & IT Cooling S.p.A. (previously DeLclima S.p.A.)

DeLclima, established on December 29, 2009, designs, manufactures and sells commercial HVAC equipment and cooling equipment for industrial and IT use. DeLclima's subsidiaries include Climaveneta S.p.A. and RC Group S.p.A., which offer the following strengths:

  • Climaveneta S.p.A.

-    Leading market share in Europe and strong brand supported by customer trust and high quality in the chillers business;
-    Energy-saving and low-noise technology, superior development and design, and efficient production capabilities that allow product customization and quick delivery; and
-    System-solution capabilities, such as remote monitoring of HVAC equipment.

  • RC Group S.p.A.

Expertise in specialized air conditioning, including for server rooms, one of its major businesses

  1. Chillers maintain the temperature of an object by utilizing a heat medium (e.g., water) in a loop system and as a general name refer to central air conditioning systems whose primary application is for large facilities such as buildings and factories.
  2. Regulations in Europe require the total emissions for Freon gas, a type of greenhouse gas, to be reduced gradually by 2030.


Mitsubishi Electric Presents Hybrid City Multi System on The Market for The First Time

  • The benefits of refrigerant and water energy as energy sources combined in one system
  • Refrigerant circuit between outdoor unit and HBC controller
  • Water circuit from HBC controller to indoor units
  • Highly efficient solution based on 2 pipe system technology
  • Prototype already in use

Nuremberg / Ratingen, 9 October 2012 – At Chillventa 2012 in Nuremberg, Mitsubishi Electric presented a Hybrid City Multi system on the market for the first time, which combines the ,benefits of refrigerant and water as energy sources in one system. The tech-nology is based on the company’s VRF R2 system and consists of a City Multi series VRF R2 outdoor unit and a specially developed HBC controller, which distributes the refrigerant and shifts the heating and cooling energy. With the Hybrid City Multi system, energy is transferred from the refrigerant to water via two plate heat exchangers, which then supplies the indoor units from a central location in the building. The unit is already in operation as a prototype in the Ratingen-based manufacturer’s new administration building.

“Firstly, with this ground-breaking innovation we are meeting increasingly stricter requirements in terms of the F-Gas Regulation and thus the use of refrigerants. As with our new Hybrid VRF-system, we are kind of self-sufficient,” explains Michael Lechte, Marketing Manager of Mitsubishi Electric, Living Environment Systems. “Secondly, we can offer an impressive, highly efficient solution if for example a building has to be cooled and heated using water as the energy source.”

In this context, Hybrid City Multi technology uses the advantages of both a water and refrigerant conducting system. The high efficiency of a VRF system is achieved in this way, for example. At the same time a relatively high outside temperature can be applied in the air outlet. “We can now offer a highly efficient alternative to classic chiller / fan coil applications, in particular to companies and hotel chains, who do not want to install any direct expansion in their rooms,” Lechte explains the prospects for this. Two inverter controlled pumps are used in the HBC controller, which ensure that exactly the required amount of water is fed to the end units. “Water pumping stations, buffer tanks, anti-freeze and glycol are no longer an issue as a result,” says Lechte.

In addition, there is significantly less effort required in terms of planning and plant design, compared to a classic 4 pipe system. The basis for this is the energy shift within a building: whilst heat has to be drawn from one part of the building, another area needs heat. This can be shifted through the pipe network, thus making sensible use of it. In the process, the outdoor unit in this networked system differentiates between predominantly heating and cooling operation. Due to the energy shift and heat recovery of this technol-ogy, waste heat in summer for example can be used for hot water supply. Just as with standard VRF R2 systems, COPs up to 8 are possible.

“This technology was specifically developed for the needs of modern building architec-ture and maximum efficiency in using the available cooling energy and heat energy. Our aim is to highlight how comprehensive, highly efficient solutions based on renewable energy sources can be developed to fully supply buildings with heat and air conditioning using our products,” concludes Lechte.

Mitsubishi Electric Air Conditioners Installs Energy Saving VRF System at A Prestigious Bank

Unpredictable weather conditions and pressure to conserve energy has made it mandatory for commercial property developments to consider installing air-conditioning systems that will save them energy and money, as well as provide hassle free maintenance service.

One of SA’s biggest banks appointed Mitsubishi Electric Air Conditioning (MSA) to install the City-Multi Variable Refrigerant Flow (VRF) air conditioning system in their lavish Cape Town premises, overlooking the ocean and mother city skyline.

The technical brief encompassed installing an air conditioning and energy sufficient system that would allow the building maximum heat recovery to reduce running costs as well as provide good quality air conditioning to Absa Wealth building occupants – its staff members and clients.

The main feature of the VRF heat recovery system is its energy saving capability - consuming less than 40% electricity than a usual constant volume air conditioner. Typically when an air conditioner is in the cooling mode, it absorbs the heat energy contained within the space it is trying to cool down, using the basic principles of refrigeration. Once this heat energy has been contained, it will reject the heat outside through an outdoor unit, making that heat redundant. The Mitsubishi VRF system however recycles that ‘redundant’ heat and uses it to heat or cool down other areas in the building, especially during winter months and or early morning and late afternoons, also heating water at 70 Degrees Celsius.

Roger Burrows from Mitsubishi Air Conditioning said: “As a leading manufacturer of energy efficient heat pump systems, we constantly strive to meet and exceed the increasing demands placed on our industry. The drive to reduce energy consumption and the impact its use has on the environment is crucial and increasingly important to us all. Sustainability has long driven Mitsubishi Electric to spend time and their resources researching and developing efficient air conditioning equipment, which meets our clients’ high quality standards. This fact, has led to successful installations at this highly prestigious building. ”

The ability for this system to heat, cool and heat water off one system simultaneously is unique to the air conditioning industry.

The list of contractors included Coastal Air Suppliers.

For more information on this project, contact MSA on 011 830 2080


In August 2001 M.S. Air-conditioning Distributors (Pty) Ltd acquired the distribution rights for Mitsubishi Electric Air-Conditioners within southern Africa.

The brand has grown immensely since then- providing a high level of service in the commercial and industrial markets, spearheaded by their highly experienced technical team in the air-conditioning industry.

Mitsubishi Electric Air-conditioner attributes their success to quality, attention to detail and rendering excellent customer service, lauded by their clients countrywide.

With products ranging from Room air-conditioners, Duct air-cons , City Multi and the new Ecodan Air – to – water heat pump, Mitsubishi Electric Air-Conditioners competes with big industry players, subsequently becoming one of the top three air-conditioning brands in southern Africa.

Celebrating 10 years of excellence

The company celebrated its 10th year anniversary with a black tie gala dinner held at Summerplace in Sandton.

Their guests included Mitsubishi representatives from Tokyo head office, a number of their loyal clients and industry players who have supported the brand throughout their tenure in the country.

Mitsubishi Electric Air Conditioners also took this opportunity not only to mark their 10 year centenary but to also honour their staff members who have dedicated 10 years of their careers working to grow the brand.

Addressing the guests, Mitsubishi Electric Air Conditioners’ Marketing Director, Marco Ferdinandi, said: “The Company started during the unfavourable time of the USA twin towers tragedy. From the onset we were met with challenges and uncertainties about the potential for the brand to ever thrive. However we soldiered on and strived to be the best at what we do.” Ferdinandi continued: “It is true that who you employ can make or break your company, we are proud that our staff has worked hard to help build this brand, especially the recipients of this year’s Loyalty Awards.”

The recipients of the 10 year Loyalty Awards are:

1. Esther Sikakane
2. Joseph Mzizi
3. Patrick Themba
4. Selwyn Staples
5. Roger Burrows

Yoji Saito, General Manager, Strategy & Business Planning Department from Mitsubishi Electric Corporation Tokyo, Japan presented the Financial Director, Chard Whitley and Marco Ferdinandi with plaques to thank them for their unrelenting contribution to the Mitsubishi Electric brand.

The guests were treated to good food, great live music and performances by the carnival dancers.

Mitsubishi Electric looks forward to another 10 years of service excellence.