Frequently asked questions

The quote is an initial non-binding estimate based on the data you have entered. A detailed quote would require an on-site assessment.

Our heating calculator allows you to receive a non-binding quote for a heating modernisation by entering details about your current heating system and built. Simply fill in the relevant information and start the calculator.

There may be a leak in the system or a problem with the main water supply. We would recommend having the system inspected to determine the exact cause.

This could be due to a faulty heating element, thermostat, or other components. An on-site inspection will provide clarity.

A faulty toilet flush can have various causes, from a defective valve to a problem with the water supply. In most cases this can be repaired quickly, but it is advisable to have it checked to avoid potential water damage.

Unpleasant odours from drains are often caused by blockages or deposits. Regular cleaning can help, but if the smell persists, a professional inspection is recommended.

Make sure that pipes in unheated areas are well insulated. In very cold temperatures, you can also let a thin trickle of water run through the pipes to prevent freezing.

Not necessarily. Often just a worn seal or cartridge needs to be replaced. We can diagnose the problem and carry out the necessary repairs.

We endeavour to reach our customers as quickly as possible in an emergency. Response times may vary depending on the location and time of day, but we always aim to be with you within a few hours.

There are several possible causes, including a defective pump, air in the system, or a problem with the control unit. We recommend calling our emergency service so that we can identify and rectify the problem quickly.

Emergency call-out costs vary depending on the time of day, the scope of work, and the materials required. We will inform you transparently about the costs before starting work.

Please contact us immediately on our emergency number. Our team is available around the clock to provide rapid assistance in urgent situations.

The obligation to supply spare parts varies by manufacturer and product. In general, manufacturers are required to supply spare parts for a certain number of years after production ends. Please contact us for specific information about your device.

Repair costs depend on the nature and extent of the damage as well as the materials required. We offer transparent pricing and will provide you with a cost estimate before starting any work.

You can request the water hardness value from your local water supplier or use a test kit to measure it yourself. We are also happy to assist you with this.

If your system reports a fault, please note the error message and contact us. Our technicians can usually diagnose and resolve the problem quickly.

Yes, soft water can extend the lifespan of household appliances by reducing limescale buildup. It also means you need less detergent and cleaning products.

The frequency depends on the type of filter and the quality of your water. As a general rule, filters should be changed every six to twelve months. We recommend following the manufacturer's instructions.

The Grohe Sense Guard is a smart water controller that monitors your water consumption, detects leaks, and can automatically shut off the water supply to prevent damage. It can be conveniently controlled via a smartphone app.

The Grohe Blue tap provides chilled, filtered, still or sparkling water directly from the tap. It is an environmentally friendly and convenient alternative to bottled water, as it reduces plastic waste and saves money in the long run.

Both systems reduce water hardness, but they work differently. A water softener uses an ion exchange process to remove calcium and magnesium ions, while a soft water system may use other technologies. The choice depends on your specific requirements and water quality.

Solar thermal systems use sunlight to generate heat, which is primarily used for hot water and space heating. Photovoltaic systems, on the other hand, convert sunlight directly into electricity. Both systems can be combined to maximise energy efficiency.

Heat pumps are significantly more efficient than conventional heating systems. They can generate three to five times more energy than they consume. This makes them a cost-effective and environmentally friendly alternative.

The lifespan varies by system type. Photovoltaic systems typically last 25 to 30 years, solar thermal systems around 20 to 25 years, and heat pumps around 15 to 20 years. Regular maintenance can extend the service life.

On days with little sun or wind, energy storage systems such as batteries can bridge the gap. Alternatively, you can draw on the public electricity grid. A well-designed system takes such scenarios into account to ensure reliable energy supply.

Renewable energy systems can increase the value of your property, as they reduce energy costs and make the property more attractive to potential buyers. An energy-efficient home is increasingly in demand in today's market.

Yes, renewable energies can also be installed in older buildings, although additional adjustments may sometimes be necessary. A thorough on-site assessment helps to identify the best solutions for your specific building.

There are various government subsidies available for the installation of renewable energy systems, including grants and low-interest loans from the KfW development bank and the BAFA (Federal Office for Economic Affairs and Export Control). We can provide advice on the available options and help you apply.

Complete independence from the electricity grid is theoretically possible with a sufficient combination of renewable energy sources and storage systems. However, this requires careful planning and a significant investment. For most households, a hybrid solution – combining self-generated energy with grid connection – is the most practical option.

The payback period for a photovoltaic system depends on various factors, including system size, location, energy consumption, and available subsidies. On average, payback takes between eight and twelve years.

Depending on your home's location and structural conditions, a variety of systems may be suitable, including photovoltaic systems, solar thermal systems, heat pumps, or even small wind turbines. We offer a comprehensive consultation to find the best solution for your needs.

Renewable energies offer numerous benefits: they reduce your energy costs, make you less dependent on fossil fuels and rising energy prices, and contribute to environmental protection. In addition, they can increase the value of your property and may entitle you to government subsidies.

"Renewable energies" refers to energy sources that are naturally replenished, such as solar energy, wind energy, hydropower, geothermal energy, and biomass. In contrast to fossil fuels, they produce little to no greenhouse gas emissions and contribute to reducing climate change.

Current trends in bathroom design include the use of natural materials such as stone and wood, minimalist design with clean lines, smart bathroom technology, walk-in showers, freestanding bathtubs, and sustainable products that conserve water and energy.

There are several ways to save water and energy in the bathroom: installing water-saving fittings and shower heads, using thermostatic shower systems to avoid wasting water while waiting for the right temperature, and choosing energy-efficient lighting. Insulating your hot water pipes can also help reduce heat loss.

Whether you can remain in your home during the renovation depends on the scope of the work. For minor renovations, it is often possible to stay. For more extensive work, temporary relocation may be advisable. We will discuss this with you in advance and plan accordingly.

High-quality ceramic tiles, natural stone, and modern composite materials are popular choices for durable and stylish bathrooms. For fittings, stainless steel or chrome-plated brass are recommended. The right choice of materials depends on your personal preferences and budget.

If you live in a homeowners' association (WEG), you generally only need approval for changes that affect the structure of the building or shared areas. For work within your own apartment, you usually have more freedom, but it is advisable to inform your neighbours and the property management in advance to avoid any disputes.

Yes, there are various subsidies available for energy-efficient bathroom renovations, particularly if the work improves energy efficiency or promotes barrier-free accessibility. KfW and BAFA offer relevant programmes. We can advise you on the available options.

A bathroom renovation typically begins with a consultation and planning phase to clarify your wishes and requirements. This is followed by the preparation of a cost estimate and timeline. During the renovation itself, old fittings are removed, any necessary structural work is carried out, and new elements are installed. We coordinate all the tradespeople involved and keep you informed throughout the process.

If your heating breaks down, please contact our emergency service immediately. In the meantime, check whether the thermostat is set correctly and whether the pressure in the system is within the normal range. If you smell gas, leave the building immediately and call the gas emergency number.

The installation time depends on the type of heating system and the complexity of the installation. In general, installing a new heating system takes between one and three days. We will give you an accurate estimate during the planning phase.

Hydraulic balancing is the process of adjusting the flow rates in a heating system so that all radiators and floor heating circuits are supplied with the right amount of heat. This improves energy efficiency, increases comfort, and can reduce heating costs by up to 15 percent.

Underfloor heating offers several advantages: it distributes heat evenly across the floor, which is particularly comfortable. It operates at lower flow temperatures than conventional radiators, making it especially efficient in combination with heat pumps or condensing boilers. In addition, it frees up wall space as there are no radiators.

Regular servicing, hydraulic balancing, and the use of programmable thermostats can significantly reduce energy consumption. Insulating pipes and, where possible, upgrading to a more efficient heating system are also worthwhile measures. We are happy to advise you on the best options for your home.

We offer a wide range of heating systems, including gas and oil condensing boilers, heat pumps (air source, ground source, and water source), pellet heating systems, and solar thermal systems. We will advise you on which system best suits your needs and building.

We recommend having your heating system serviced at least once a year. Regular maintenance ensures efficient operation, extends the service life of the system, and helps to identify potential issues early.

Yes, regular servicing of your heating system is strongly recommended. It ensures safe and efficient operation, extends the service life of the system, and can prevent costly repairs. In addition, regular maintenance is a requirement for many manufacturer warranties.

Yes, heat pumps can also be used in older buildings. However, it may be necessary to improve the building's insulation to enable efficient operation. Air-to-air heat pumps in particular are relatively easy to retrofit. We will assess the specific conditions of your property and recommend the most suitable solution.

Switching to renewable energies is worthwhile in many respects: it reduces your dependence on fossil fuels, lowers your energy costs in the long term, and contributes to reducing CO₂ emissions. Furthermore, there are attractive government subsidies available to help reduce the initial investment.