The costs of a complete heat pump installation vary greatly and depend on various factors, including the type of heat pump, power capacity, the complexity of the installation, home insulation, and any modifications to the heating system. Here are some general guidelines:

1. Air-Air Heat Pump:

   • The costs for an air-air heat pump usually start around €5,000 to €7,000, including installation.

2. Air-Water Heat Pump:

   • An air-water heat pump is often slightly more expensive and can range from €8,000 to €15,000 or more, depending on the power capacity and installation requirements.

3. Ground-Water or Water-Water Heat Pump:

   • These systems are generally more expensive due to the complexity of the installation. Costs can range from €12,000 to €25,000 or more, depending on the specific situation.

4. Hybrid Heat Pump:

   • A hybrid heat pump, which works alongside an existing central heating boiler, can vary in cost from €6,000 to €12,000, including installation.

It's important to note that these cost estimates are rough and can vary significantly based on specific circumstances. Other factors affecting costs include the home's location, required modifications to the heating system, the degree of insulation, and any subsidy or financing options.

Additionally, you should consider additional costs, such as:

• Installation Costs: Installation costs can vary depending on the complexity of the installation.

• Modifications to the Heating System: Sometimes, modifications are needed to make the heating system suitable for a heat pump.

• Maintenance Costs: It is important to consider periodic maintenance for optimal performance.