[2] VRF systems, unlike conventional chiller-based systems, allow for varying degrees of cooling in more specific areas (because there are no large air handlers, only smaller indoor units), may supply hot water in a heat recovery configuration without affecting efficiency,[3] and switch to heating mode (heat pump) during winter without additional equipment, all of which may allow for reduced energy consumption.
By operating at varying speeds, VRF units work only at the needed rate allowing for substantial energy savings at load conditions.
This is made possible because the heating unit is functioning as a condenser, providing sub-cooled liquid back into the line that is being used for cooling.
While it is unlikely that this balance of cooling and heating demand will happen often throughout the year, energy efficiency can be greatly improved when the scenario occurs.
In addition, such gateway solutions are capable of providing remote control operation of all HVAC indoor units over the internet incorporating a simple and friendly user interface.