Heat pump flexoTHERM exclusive VWF 57/4 Regulator sensoCOMFORT 720 Internet gateway VR 940f

Product detailed description

Heat pump Vaillant flexoTHERM exclusive VWF 57/4

The heat pump Vaillant flexoTHERM exclusive VWF 57/4 is a highly efficient ground/water (or water/water) type heat pump, suitable for single-family homes and small businesses with a thermal loss of approximately up to 6 kW. It belongs to the fourth generation of the flexoTHERM exclusive series, which builds on the proven German design, quiet operation and high seasonal efficiency. The unit is compact, the entire installation takes place inside the building (technical room, boiler room, basement) and it connects to the ground or water heat source via a ground collector, vertical boreholes or a well (well – infiltration system).

The model VWF 57/4 is the smallest representative of this series and is available together with the digital system controller sensoCOMFORT 720 and the internet gateway VR 940f, which allows remote control and monitoring of the heating system via a mobile app and its remote diagnostics by service technicians.

Technical parameters

• Nominal thermal output (B0/W35): approx. 5.7 kW
• Power consumption (B0/W35): approx. 1.4 kW
• COP (B0/W35) according to EN 14511: approx. 4.2
• Refrigerant: R410A, hermetically sealed refrigeration circuit
• Compressor: high-efficiency scroll compressor
• Energy class (heating, 35 °C): A++
• Dimensions (H × W × D): 1 183 × 595 × 600 mm
• Weight: approx. 151 kg
• Compressor power supply: 3~/N/PE 400 V, 50 Hz
• Controller: sensoCOMFORT 720
• Internet gateway: VR 940f
• Active cooling: yes, in standard equipment (natural cooling)
• Noise emissions: very quiet operation thanks to the Sound Safe System

What is flexoTHERM exclusive and why choose it

The flexoTHERM exclusive heat pump can flexibly use energy stored in the ground, groundwater or air (in combination with an outdoor unit aroCOLLECT), depending on which heat source is available at the site. This makes it suitable for both new buildings and renovations, where an old gas or electric boiler needs to be replaced with an ecological and more cost-effective heating solution.

The unit is marked with the Green iQ label – this label is used by Vaillant to denote products with advanced, sustainable and highly efficient technology, which also allow intelligent internet connectivity. A high proportion of recycled materials in the construction and low electricity consumption during operation make the flexoTHERM exclusive one of the more ecological heating solutions on the market.

Thanks to the integrated Sound Safe System, the flexoTHERM exclusive belongs among the quietest heat pumps in its class – the indoor unit is sound-insulated and vibration-isolated from the building structure, making it suitable even for living areas near bedrooms.

Control and remote operation

The modern touch controller sensoCOMFORT 720 is part of the delivery, which controls the entire heating system including the preparation of hot water, equithermal control, multiple heating circuits and the function of active cooling. The controller has a clear color touch interface and allows setting weekly heating and hot water programs.

The internet gateway VR 940f connects the heat pump to the internet and allows its remote control via a mobile app from a phone or tablet – the user can thus change the temperature and operating mode from anywhere. The gateway also allows an authorized service technician to perform remote diagnostics of the fault without the need for an immediate site visit, which shortens the repair time and reduces service costs.

Installation and heat source

The model VWF 57/4 connects to a low-temperature heat source according to the geological conditions of the site:

• Ground loop collector – placed in a frost-free depth, suitable for a sufficiently large plot of land,
• Vertical geothermal boreholes – suitable for a smaller plot of land, require implementation by a drilling specialist,
• Groundwater (well – infiltration) – highest efficiency due to the stable temperature of the groundwater throughout the year, requires sufficient flow rate and water quality.

The indoor unit is installed in a technical room, boiler room or basement with sufficient space for service access. Connection to the heating system (radiators, underfloor heating or a combination of both) takes place in the standard way via a manifold or directly to the heating circuit. For the preparation of hot water, we recommend a combination with an accumulator heater with a suitable volume according to the number of people in the household.

Installation and commissioning may only be carried out by an authorized service organization with a valid Vaillant training, which also ensures the correct setting of the controller and the delivery of the warranty card. We recommend also arranging an annual service, which prolongs the life of the device and maintains the guaranteed efficiency.

Compatible accessories

• Accumulator water heaters (e.g. the uniSTOR, actoSTOR series) in volumes according to the needs of the household,
• Separation and distribution modules fluoCOLLECT for connecting multiple heating circuits,
• Buffer tanks to increase system accumulation,
• Accessories for ground collectors or geothermal boreholes (distribution pits, frost-resistant mixture),
• Room temperature and humidity sensors for individual heating zones,
• Multi-Matic / sensoCOMFORT remote control units for individual rooms.

Common questions (FAQ)

What size house can the VWF 57/4 heat?
With a properly dimensioned heating system (best with floor or low-temperature heating), the model 57/4 is suitable for single-family homes with a thermal loss of approximately up to 6 kW, which in a typical new build with good thermal insulation corresponds to an area of about 120–160 m².

Can the heat pump also be used for cooling in summer?
Yes, the flexoTHERM exclusive has an integrated function of active (so-called natural) cooling as standard, which can slightly cool the interior in summer months via the same distribution that is used for heating in winter – without the need for an additional air conditioning unit.

Is a building permit required for a ground collector or borehole?
In most cases, a geology work notification and a permit from the relevant authority are required for vertical boreholes, while the administration is simpler for a ground loop collector. We recommend consulting the exact requirements with the implementation company before signing the contract.

What is the lifespan and warranty?
With regular service, the lifespan of the Vaillant heat pump is usually 20 or more years, the compressor is a highly reliable scroll type. A standard 2-year legal warranty applies to the product, an extended warranty can be agreed with an authorized Vaillant service partner upon fulfillment of the conditions for regular service inspections.

Can the heat pump be controlled from a phone?
Yes, thanks to the internet gateway VR 940f and a free mobile app, it is possible to change temperatures, heating programs and hot water preparation mode from anywhere with an internet connection.

Operating costs and savings

Thanks to a high coefficient of performance COP of around 4.2, the heat pump VWF 57/4 produces approximately 4 kWh of heat from 1 kWh of electrical energy, which compared to direct electric heating brings significant savings on operating costs. In addition to air-source heat pumps, the ground or water heat source has a more stable temperature throughout the entire heating season, so the pump maintains high efficiency even on the coldest winter days, when air-source units lose performance. The actual operating savings depend on the quality of the building's thermal insulation, the setting of the heating curve and the type of metering point (we recommend considering a two-tier electricity tariff for heat pumps).

Ecological benefits

The heat pump does not produce any emissions at the installation site during operation – it does not burn natural gas or any other fossil fuel. In combination with a photovoltaic power plant on the roof of the house, it is possible to significantly reduce the indirect carbon footprint of heating as well. Thanks to the Green iQ certification and low noise level, flexoTHERM exclusive also meets stricter requirements for quiet and sustainable operation in residential areas.

We supply the Vaillant flexoTHERM exclusive VWF 57/4 heat pump with the sensoCOMFORT 720 controller and the internet gateway VR 940f, including expert advice on selecting the appropriate heat source and accessories. If you are interested in a specific system configuration (collector, boreholes, hot water tank), do not hesitate to contact us – we will gladly prepare a customised quotation for you.