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Serving the Greater Nashville Area

VRF – Variable Refrigerant Flow

VRF – Variable Refrigerant Flow in Hendersonville, TN

VRF, or Variable Refrigerant Flow is an HVAC technology also referred to as Variable Refrigerant Volume (VRV). Similar to ductless mini-split systems, VRFs use refrigerant as their cooling and heating medium, and the refrigerant is conditioned by a single outdoor condensing unit, and then circulated within your Hendersonville, TN property via multiple fan-coil units (FCUs).

The actual term Variable Refrigerant Flow refers to the ability of the HVAC system to control the amount of refrigerant that flows to each of the evaporators, and this is what enables the use of multiple evaporators of differing capacities and configurations, in addition to individualized comfort control and heat recovery from one zone to another.

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Serving the Greater Nashville area, Nashville North, and South Central Kentucky

How Do VRF Systems Work?

Variable Refrigerant Flow systems function by using the principle of direct expansion (DX). This means that heat is transferred to or from the space directly by circulating refrigerant to evaporators, which are located near or within the conditioned space.

There are a number of advantages to refrigerant flow control, including a flexible system design, improved energy efficiency, high system reliability, and fairly simplistic installation. They take what is beneficial about multi–split HVAC systems and enhance their features even more.

The Difference between Traditional Multi–Split Systems and VRFs

While multi–split HVAC systems turn off or on completely in response to one master controller, a VRF system continually adjusts the flow of refrigerant to each indoor evaporator. The control is achieved by continually varying the flow of refrigerant through a pulse modulating valve (PMV) whose opening is determined by the microprocessor receiving information from the thermistor sensors in each indoor unit.

These indoor units are connected by a control wire to the outdoor unit, which responds to the demand from the indoor units by varying its compressor speed to match the total cooling and/or heating requirements.

The Heat Recovery Process

If you choose a Variable Refrigerant Flow system with the heat recovery capability—these systems are referred to as VRF–HR—then your system will be able to operate simultaneously in heating and cooling mode. This enables heat to be used rather than expelled, like it would be in a traditional heat pump system.

VRF–HR systems are comprised of enhanced features such as inverter drives, pulse modulating electronic expansion valves and distributed controls that enable the system to operate in net heating or net cooling mode, as required by the space.

What Does This Mean for You?

Perhaps the biggest benefit of a VRF system—and the reason that many homeowners throughout Hendersonville, TN and beyond choose this system—is its energy efficiency. This type of system is designed to provide the exact amount of cooling needed for the current conditions of your living space.

This enables it to run less frequently and at a lower capacity. That, coupled with its ability to capture and reuse heat through its heat recovery process means that you’ll see significant energy and cost savings throughout the year. VRF systems are also very versatile in that they take up little space in comparison to traditional HVAC systems, and provide consistent comfort that can’t be beat!

Ask Us About Our VRF Products and Services

At Covenant Heating and Cooling, we specialize in the installation and service of Fujitsu VRF systems. It’s important to remember that VRF systems are very sophisticated, and the installation of these systems requires a highly–trained and experienced VRF HVAC Technician.

An inexperienced company or a general handyman very likely will not understand the unique requirements of VRF HVAC systems. In addition, just like any other HVAC system, your VRF system must be appropriately sized and fitted for the specific requirements of your Hendersonville, TN home. Avoid subpar operation and high energy costs due to inefficient installation by contacting the team you can trust—Covenant Heating and Cooling. We look forward to serving you.

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