Heat pump flexoTHERM exclusive VWF 157/4 Regulator sensoCOMFORT 720 Internet gateway VR 940f
Code: 0010020349Related products
Product detailed description
Heat pump Vaillant flexoTHERM exclusive VWF 157/4
The heat pump Vaillant flexoTHERM exclusive VWF 157/4 is the most powerful model of the flexoTHERM exclusive series available in this range – a highly efficient ground/water (or water/water) heat pump designed for larger family homes, multi-generational houses or small commercial buildings with higher heat loss. Despite its high performance, it is a compact indoor unit without the need for an external evaporator. The model is delivered with the touch controller sensoCOMFORT 720 and the internet gateway VR 940f for remote control and service diagnostics.
Technical specifications
- Nominal thermal output (B0/W35): approx. 13.9 kW
- Power consumption (B0/W35): approx. 3.5 kW
- COP (B0/W35) according to EN 14511: approx. 4.1
- 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. 190 kg
- Compressor power supply: 3~/N/PE 400 V, 50 Hz
- Controller: sensoCOMFORT 720
- Internet gateway: VR 940f
- Active cooling: yes, standard integrated (natural cooling)
- Noise emissions: quiet operation thanks to the Sound Safe System
What is flexoTHERM exclusive and why choose it
The flexoTHERM exclusive heat pump flexibly uses energy stored in the ground, groundwater or (in combination with the outdoor unit aroCOLLECT) also in the air. The model VWF 157/4 is designed for buildings with higher heat loss, where a smaller model of the series would no longer be sufficient to cover peak loads on the coldest days of the heating season.
The unit carries the Green iQ designation, which Vaillant uses to mark products with advanced, sustainable and highly efficient technology with the possibility of intelligent internet connectivity. A high proportion of recycled materials in the cabinet construction and low operational electricity consumption contribute to a lower carbon footprint of heating even in larger buildings.
Thanks to the Sound Safe System, which vibrationally separates the compressor and refrigeration circuit from the unit's housing, the flexoTHERM exclusive belongs among the quietest heat pumps in its performance class – suitable even for technical rooms adjacent to living areas.
Control and remote operation
The system controller sensoCOMFORT 720 with a color touch display controls the entire heating system – hot water preparation, equithermal control, multiple heating circuits (suitable for multi-generational homes with separate zones) and the summer mode of active cooling. It allows setting weekly time programs and provides an overview of the current consumption and performance of the system.
The internet gateway VR 940f connects the heat pump to the home WiFi network and the internet, making it possible to control the entire system remotely via a mobile app. An authorized service technician can also remotely diagnose any potential fault via the gateway without the need for an immediate site visit, which is particularly beneficial for larger installations with higher operating costs.
Installation and heat source
The model VWF 157/4 is connected to a low-temperature heat source according to the geological conditions of the site – a ground loop collector, vertical geothermal boreholes or a well system in the case of groundwater use. At this performance level, an accurate heat source project is essential (more boreholes of greater depth or a larger collector area) to ensure sufficient regeneration throughout the entire heating season and a stable seasonal performance factor.
The indoor unit is installed in a technical room or boiler room with sufficient space for service access and, if necessary, connection of additional electric heating in extreme cold. For hot water preparation at higher consumption, we recommend a larger storage tank or a combination of multiple storage tanks. Installation and commissioning must be carried out only by an authorized service organization trained by Vaillant.
Compatible accessories
- Large-volume hot water storage heaters (from the uniSTOR, actoSTOR series) according to household needs,
- Separation and distribution modules fluoCOLLECT for connecting multiple heating circuits,
- Buffer tanks for increasing system accumulation at higher outputs,
- Accessories for ground collectors or geothermal boreholes (distribution shafts, antifreeze mixture),
- Room temperature and humidity sensors for individual heating zones,
- Remote control units sensoCOMFORT for individual rooms or apartment units.
Frequently asked questions (FAQ)
How large a house can the VWF 157/4 heat?
With a properly dimensioned heating system (ideally floor or low-temperature heating), model 157/4 is suitable for family or multi-generational homes with a heat loss of approximately up to 14 kW, which in a new build with good thermal insulation corresponds to an area of approximately 300–380 m².
Can the heat pump also be used for cooling in summer?
Yes, the flexoTHERM exclusive has a standard integrated active cooling function (natural cooling), which can cool the interior in a mild way during summer via the same distribution that is used for heating in winter.
Is a building permit required for drilling or a collector?
For vertical geothermal boreholes, it is usually necessary to notify the relevant authority about geological work, while for a ground loop collector, the administration is simpler. For this model's performance, an accurate geological assessment and heat source project are essential.
What is the lifespan and warranty?
With regular service, the lifespan of a Vaillant heat pump is typically 20 or more years, and the SCROLL compressor is highly reliable. The product is covered by a 2-year legal warranty; an extended warranty can be agreed with an authorized service partner upon fulfilling 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 modes from anywhere with an internet connection.
Operating costs and savings
Thanks to a coefficient of performance (COP) of around 4.1, the VWF 157/4 heat pump produces approximately 4 kWh of heat from 1 kWh of electrical energy, which even at this higher output of the model brings significant savings in operating costs compared to direct electric heating or an older gas boiler. Compared to air-source heat pumps, the ground or water heat source has a more stable temperature throughout the entire heating season, allowing the pump to maintain high efficiency even on the coldest winter days without the need for frequent activation of additional electric heating. The actual 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 rate for heat pumps).
Environmental benefits
The heat pump produces no 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 a larger or multi-generational building. Thanks to the Green iQ certification and low noise level, the flexoTHERM exclusive also meets stricter requirements for quiet and sustainable operation in residential areas.
The Vaillant flexoTHERM exclusive VWF 157/4 heat pump with the sensoCOMFORT 720 controller and the VR 940f internet gateway is delivered with professional advice on selecting the appropriate heat source and accessories. If you are interested in a specific system configuration (collector, boreholes, hot water storage tank), please do not hesitate to contact us – we will gladly prepare a tailor-made quotation for you.
Heat pump systems
A heat pump is a device that transfers heat from one place to another. In heating mode, it extracts heat from the outside air (air-source heat pump) or from the ground (ground-source heat pump) and transfers it into a building. In cooling mode, the process is reversed.
Heat pumps are highly efficient because they move heat rather than generate it. They can provide two to three units of heat for every unit of electricity consumed, making them an environmentally friendly and cost-effective heating solution.
There are several types of heat pumps, including:
- Air-source heat pumps (ASHPs)
- Ground-source heat pumps (GSHPs)
- Water-source heat pumps (WSHPs)
Each type has its advantages and is suitable for different applications and environments. Proper installation and maintenance are essential for optimal performance and longevity of the system.
When selecting a heat pump system, it is important to consider factors such as the size of the space to be heated or cooled, the local climate, and the availability of renewable energy sources. Consulting with a qualified HVAC professional can help ensure the best system is chosen for your specific needs.
Additional parameters
| Category: | Ground-to-Water Heat Pumps |
|---|---|
| Warranty: | 2 years |
| Weight: | 150 kg |
| Power: | 15.7 kW |
| Type: | indoor unit ground-water |
| Refrigerant: | R410A |
| Cooling possible: | yes |
| Water as heat source possible: | yes (with fluoCOLLECT module) |
| Controller: | sensoCOMFORT 720 |
| Internet gateway: | VR 940f |
| Remote control possible: | yes (myVAILLANT app) |
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About the company
The Vaillant Group is synonymous with heating and hot water preparation, placing particular emphasis on quality, reliability and user comfort. Its heating technology products are present in more than 100 countries around the world. The group unites the brands Vaillant, Saunier Duval, AWB, Bulex, DemirDöküm, Glow worm, Hermann Saunier Duval and Protherm. Each of these brands has extensive experience in the production of heating equipment, as most of them have been active in this segment for more than 80 years. With its 140 years of market presence, the brand Vaillant is among the largest and most significant. It has long been a market leader and a pioneer in the development and innovation of heating technologies in Europe. The Vaillant Group has an extensive network of sales representatives and thousands of satisfied customers around the world.
The extensive portfolio of the Vaillant Group includes modern heating technologies that are energy-saving, efficient and contribute to environmental protection. Thanks to a wide range of products and models, every customer can find exactly what they need here. The range includes wall-hung and floor-standing boilers, hot water storage tanks or electrical appliances. In the market of wall-hung boilers, the company is even number one in Europe with a 26 percent market share. The Vaillant Group is not specialized only in the development and production of boilers; its product portfolio also includes technologies that use renewable energy sources, such as solar systems or the most modern heat pumps and air conditioners. It also offers recovery or cogeneration units or zeolite heat pumps to users.
Vaillant Group thinks ahead every day and offers individual solutions for every need and type of energy. Its success is also based on research and development, which always takes place in line with the wishes of customers. The company's research and development department is among the largest and above all the most creative departments in this segment. The team of developers is constantly working on new devices and technological systems that are increasingly easy to operate and already meet the demands of tomorrow. Whether it is about energy solutions of the future or about the best way to use fossil fuels, the company Vaillant Group tries to anticipate new trends and to be always one step ahead of others. Proof of this is the registration of up to 100 new patents every year. In the field of production, the company places the greatest emphasis on achieving the highest quality of boilers, which represents perfection in every detail.
The Vaillant Group has its presence in most countries of the world. Slovakia is no exception, where the company Vaillant Group Slovakia, s. r. o. is located, representing the brands Vaillant and Protherm. Heating equipment of the Vaillant Group is produced in seven production plants, two of which are located on our territory. These factories employ more than 1,300 people in total. The production plant Protherm Production with its headquarters in Skalice specializes in the production of electric and floor-standing boilers for all brands belonging to the Vaillant Group. It can also boast its own research and development center, which is among the most modern in Europe. The second production plant in Slovakia is Vaillant Industrial Slovakia in Trenčianske Stankovce, which produces modules for wall-hung boilers for the entire group.
History of the company Vaillant
The history of the company Vaillant goes back to the year 1874, when it was founded by Johann Vaillant in Remscheid, Germany. Since then, the company Vaillant has been a leader in the field of heating and ventilation technologies.
History of the company Vaillant
1874 Plumber Johann Vaillant founded the company.
1894 Patented for the invention of a gas water heater with a "closed system" design.
1899 Registered company logo, the Easter Bunny.
1905 Development of a wall-mounted water heater, patented under the designation "Geyser".
1924 Development of a wall-mounted boiler for heating.
1955 Production of the millionth appliance after the end of the Second World War.
1960 Production of electrical appliances begins.
1967 Development of a combined wall-mounted boiler.
1974 11 million appliances sold since 1974.
1992 Establishment of subsidiary companies – in the Czechoslovak Republic, Hungary, Poland and Turkey.
1993 Separation of Czechoslovakia leads to the creation of a separate sales representation in Slovakia.
1999 Anniversary, 125th anniversary of the founding of the company, 40 million appliances sold in the entire history of the company.
2001 The Vaillant Group is formed, covering eight significant manufacturers of heating equipment in Europe, including the boiler manufacturer Protherm in Slovakia.
2003 The Vaillant Group production plant in Skalice specializes in the production of floor-standing boilers also for other brands belonging to the VG group.
2004 Vaillant Group opens a new production plant in Trenčín, Slovakia, for the production of hydraulic groups for wall-hung boilers.
2009 10,000,000 modules for heating equipment produced at the VG Trenčín plant.
Easter Bunny in the logo - intended for the success of the company
Pink dwarfs and cute animals stand around and admire the miracle of the egg. Johann Vaillant is fascinated by the scene and decides to buy both the picture and the copyright. For Vaillant, this means the establishment of its brand and an extremely successful story.
Very distinctive brand profile
Since 1899, the motif has adorned all products, catalogs and brochures. In a few short years, Vaillant built an excellent reputation that spread throughout Germany and even beyond its borders. Vaillant gave its logo clear lines and outlines. "The Bunny in the Egg" remains the central theme, but the word "Vaillant" is added.
Many Germans know that the Vaillant Bunny belongs to a company based in North Rhine-Westphalia. Moreover: more than 70% of all Germans have heard of the company Vaillant. In Austria and the Netherlands, the company achieves similar results for its image.
Sustainability
As a forward-looking, family-owned company, we accept special responsibility for the environment, for our employees and for society. We are convinced that economic success, sustainable and profitable growth are inseparably linked to a commitment to social and ecological standards.
In order to fulfill this commitment, we are committed to carrying out our activities in a sustainable manner within the strategic S.E.E.D.S. Program (Sustainability in Environment, Employees, Development & Products and Society). The definition of these areas of interest is based on a comprehensive understanding of sustainability, in which we also take into account key issues of our core activities.
