Connecting a heat pump to traditional radiators depends on many factors, such as the size of the room, the type of heat pump, the condition of the radiators and the energy efficiency of the system. Below I provide basic information on the costs and parameters to consider when considering installing such a system.

Heat Pump Cost

1. Air-to-water heat pumps:
   • Price: Approximately €5,000 – €12,000 (depending on the brand and power of the system).
   • These heat pumps use the outside air temperature to heat the water circulating in the radiators.
   • They are more economical to install than ground source heat pumps, but costs can increase if the system requires an upgrade to work at low temperatures.
2. Geothermal (ground) heat pumps:
   • Price: €12,000 – €20,000 (or more, depending on the size and needs of the house).
   • They are more efficient than air source heat pumps, but their installation is more expensive, as they require excavation of the ground to create the geothermal collectors.
3. Water-to-water heat pumps (ground or underground sources):
   • Price: Depending on the needs, the cost can reach or even exceed €15,000 – €30,000.
   • These pumps exploit heat from underground waters or springs, and are also higher efficiency, but their installation is even more expensive and requires specialized procedures.

Radiator Installation and Connection Cost

The cost of installing a heat pump in conjunction with old radiators can vary significantly depending on the system requirements and the condition of the existing radiator system. Some key costs include:

• Heat pump installation: Installation can cost from €1,500 to €5,000, depending on the complexity of the system.
• Radiator upgrade: If the radiators are not compatible with the lower water temperature provided by the heat pump, you may need to replace or modify them. This can increase the cost by €500 – €2,000 per radiator, depending on the size and type of radiators.
• Piping and additional equipment: If you need new piping or other modifications, the cost can range from €500 – €2,000, depending on the complexity of the installation.

Total Cost Estimate

For an average home, the total cost of installing a heat pump in combination with old radiators can range from €7,000 to €20,000, depending on the following:

• Size of the house.
• Heat pump type.
• Condition of radiators.
• Complexity of the installation (e.g. whether modifications are required to operate radiators at lower water temperatures).

Conclusions

A heat pump can provide significant energy savings and reduce heating costs, but the initial installation can be expensive. If your existing radiators are not efficient at the water temperatures that heat pumps provide, upgrades or replacements may be required, increasing the overall cost. To achieve maximum efficiency, working with an expert to assess your needs and select the appropriate equipment is vital.