The lowdown on Hybrid Variable Refrigerant Flow (HVRF) systems

These air conditioning systems combine the advantages of traditional VRF systems with advanced chiller technology

Energy efficiency is one of the major drawcards of HVRF systems, making them a popular choice as the demand for environmental responsibility grows.

Unlike conventional HVAC systems that rely solely on refrigerant lines, HVRF systems incorporate water lines.

The systems operate by replacing refrigerant with water between the hybrid branch circuit controller and the indoor units – minimising the need for expensive and ongoing leak detection servicing.

The design makes HVRF systems ideal for occupied spaces where quiet, energy-efficient, simultaneous heating and cooling is valued.

The benefits of Hybrid Variable Refrigerant Flow (HVRF) systems

Cost savings and energy efficiency

One of the main reasons for a switch to an HVRF system is for increased energy efficiency. Compared to traditional systems where energy can be wasted by heating and cooling different areas independently, HVRF systems balance this simultaneously. The use of less energy also has a positive impact on the environment.

No refrigerant concentration limits

By cooling and heating with water instead of refrigerant, HVRF systems can be used for most commercial buildings including hotels, offices, educational buildings, and hospitals and medical centres.

Flexibility

These systems also provide flexible zone control with different indoor units able to operate on heating or cooling at the same time. This is ideal for multi-tenant office buildings and hotels – individual zones can be adjusted to meet specific needs, enhancing comfort without sacrificing efficiency. However, it’s important to plan your installation – ductwork retrofitting and disruptions during installation can be experienced when adding an HVRF system to an existing building.

Case study highlight

An HVRF system was the right choice for a mid-sized office building in central Christchurch, which was recently installed by Beattie Air. The transition from a conventional HVAC system to a Mitsubishi Electric HVRF system was made to reduce operating costs and temperature inconsistencies.

The results

• A 30 per cent reduction in energy usage was seen within the first year.

• There was a 50 per cent drop in complaints about temperature inconsistencies.

• Improved system reliability paired with fewer mechanical issues has decreased maintenance costs.

• The building’s overall safety has been improved thanks to the reduced use of high-pressure refrigerant lines.