VRF stands for Variable Refrigerant Flow / VRV stands for Variable Refrigerant Volume (same thing different wording) and these systems provide very energy efficient heating or cooling.
As the name suggests a VRF / VRV system varies refrigerant according to the specific capacity required from the indoor units for optimum use of the refrigerant and therefore optimum and efficient energy usage.
A VRF / VRV system involves a single large outdoor unit connected to several indoor units;
- A heat pump VRF / VRV system will require that all the indoor units are either cooling or heating
- A heat recovery VRF / VRV system can provide simultaneous heating and cooling, i.e. some indoor units can be cooling whilst others are heating.
Although the heat pump VRF / VRV system is very energy efficient the heat recovery VRF / VRV system takes this energy efficiency even further by transferring heat across the system; for example on a building with orientation for sun on one side only in the morning rotating to the other side for sun in the afternoon, heat rejected from units on the ‘sunny side’ can be recovered to the units on the shaded side to provide ‘free’ heat.
The energy efficiency can be even further improved by including a heat pump boiler within the system so that any rejected heat can be recovered into the hot water system to reduce conventional boiler running costs.
The above is a very brief guide to these systems, and we would be pleased to discuss any aspect further without obligation.