Hybrid VRF
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Today’s buildings face tough legislation which means that traditional HVAC technologies may not always be the best solution. If only there was a way of combining the best elements of VRF technology and Chiller systems to offer even more choice. This is where the Hybrid VRF system can make a real difference - by offering a truly integrated solution both now and into the future.

What is Hybrid VRF Hybrid VRF is the latest addition to our City Multi family (our VRF range of air conditioning units for large scale applications). Built and assembled in the same factory as our VRF units thereby carrying its distinctive DNA in terms of technology, efficiency and reliability. Put simply, Hybrid VRF is a 2-pipe heat recovery VRF with water between the Hybrid Branch Controller (HBC) and indoor units. You can install and design it as VRF whilst enjoying the features of a Chiller system. Providing a complete modern solution for office buildings, hotels, medical centres,...

Hybrid Branch Controller (HBC) At the heart of Hybrid VRF A. Plate Heat Exchangers This is the point where the refrigerant circuit transfers its energy to the sealed water system. There are two sets of plate heat exchangers, both placed at opposite ends in the HBC box. Both sets provide hot water in heating mode or cold water in cooling mode. During mixed mode, one set provides hot water while the other provides cold water to it’s respective flow header. B. Pumps Each set of plate heat exchangers has a DC inverter driven water pump. This circulates the closed loop water system between the...

Image for representation only Water flow / return to indoor units 8 or 16 port options available HBC overview (mixed mode)

Hybrid VRF Features and Benefits

Flexible application options Air Source YLM (22-56kW) - using the latest City Multi VRF YLM technology including an aluminium heat exchanger, reduced weight and improved seasonal efficiency New Water Source YLM (22-56kW) - ideal where outdoor space is limited, building heat recovery and efficiency is demanded and a water loop is available Meeting future requirements Energy and refrigerant legislation F-Gas phase down - adding a third viable option F-Gas - HFC phase down programme:* It is the requirement of manufacturers to reduce the CO2 equivalent with options of: Decreased kW on the...

High sensible cooling and stable room temperatures Typically 10% increase in sensible cooling vs VRF Provides a gradual rate of change of temperature within the air conditioned space delivering a comfortable and stable environment Manageable phased installation Modular, smaller footprint and low weight outdoor units Flexible range of VRF options Cat A to Cat B is simple Ideal for office fit outs Water piping between HBC and indoor units Easier to isolate and decommission, reducing install cost Simplified 2-pipe design and installation 2-pipes throughout the system - no complex 4-pipe design...

Simultaneous heating and cooling with full heat recovery Between fan coils and building zones Optimise flexibility, operability, comfort and efficiency Ideal for a huge array of applications Heat recovery defrost method Typical defrost times of 5 minutes with immediate return to heating Improving comfort throughout the heating season, ideal for office applications No defrost on Water Source VRF models Intuitive load adjusting The latest YLM VRF refrigerant control plus water side optimisation: flow control valves, inverter driven pumps and heat recovery Providing only the capacity needed,...

Where can Hybrid VRF be applied Buildings around the UK have a high priority when it comes to energy efficiency, internal comfort and an easy control solution. We believe there is no limitation with Hybrid VRF and the possibilities are endless. Hotel Customer comfort is paramount with legislation focusing attention on energy use and seeking to limit the use of refrigerant in occupied spaces. Hybrid VRF removes the need for leak detection thereby reducing the total cost of the system and on-going maintenance of the leak detection systems itself. Office Modern offices and commercial buildings...

Hybrid VRF removes the need for leak detection in any room

Hotel application - Cost analysis Hotel customers have high demands when it comes to comfort and control whilst hotel owners have strict legislation to adhere to and costs to minimise. Mitsubishi Electric City Multi VRF is an ideal solution for hotel applications due to its efficiencies simultaneous heating and cooling with heat recovery, flexible control solutions, high seasonal efficiency and its modular design and installation. Hotel application - 17 storey, 250 bedrooms Option 1: VRF The height and size of the building makes it difficult and costly to achieve BS EN378 compliance. Option...

Considering operational costs throughout the systems lifetime, annual testing and recalibration of leak detection sensors aren’t required with Hybrid VRF, making nearly £100,000 maintenance saving (30%) over 15 years on this 250 bed hotel. Hotel Maintenance Costs VRF + Leak Detection Notes: Based on a real project, using costs from a Mitsubishi Electric Business Solutions Part

Hybrid VRF Case Studies

Case study Hampton by Hilton / Humberside Modular hotel uses modular air conditioning A hotel on the doorstep of North Lincolnshire’s major transport hub will open its doors this winter complete with Mitsubishi Electric’s innovative Hybrid VRF air conditioning system. The Hampton by Hilton next to Humberside Airport is under modular room construction with each floor section built in a factory and transported to the site. This progressive approach is also mirrored in the use of the award-winning Hybrid VRF solution. The requirements: The appeal to the hospitality sector of Hybrid VRF is in...

Case study Hoare Lea / Cardiff Consultants use office as a hybrid test bed When leading edge consultancy Hoare Lea wanted to refurbish a 12-year-old building for its Cardiff offices, the company was looking for a comfortable, energy efficient and stylish working environment for its staff, that also complied with both existing and future legislation. The requirements: The office on Cardiff Gate Business Park is a recycled building which is important to Hoare Lea as it limits the amount of embodied carbon used in moving from the company’s previous offices. The refurbishment of the two-storey...