Heat Pump Quote in Luxembourg
Compare up to 3 quotes from certified installers for your heat pump installation in Luxembourg. Free, no commitment, installers respond within 48h.
Air-Air vs Air-Water heat pump: which to choose in Luxembourg?
This is the question many Luxembourg residents ask themselves. It all depends on your home, your existing heating system and your budget.
Ideal for replacing electric radiators. Ventilation units are installed and connected to a central unit via ducts in a false ceiling.
- From €16,000 (not eligible for Klimabonus)
- Heating savings of approximately 30%
- Quick installation: 1 to 2 days
- Also works in cooling mode
- Not subsidised by Klimabonus
The preferred solution for renovation projects in Luxembourg. You keep your existing water radiators and replace the gas or oil boiler.
- From €6,500 after Klimabonus grants
- Heating savings of up to 50%
- Installation in 2 to 4 days
- Compatible with underfloor heating
- Eligible for Klimabonus up to €9,500
If you have a gas or oil boiler and water radiators, the air-water heat pump is almost always the best choice in Luxembourg: compatible with your existing system, eligible for grants, and saves you up to 50% on your heating bill. An installer will carry out a thermal study during the visit to confirm.
How does a heat pump work?
A heat pump transfers heat from one environment to another using a refrigerant fluid. It produces 3 to 4 times more energy than it consumes in electricity. However, its efficiency depends on the outside temperature:
| Outside temperature | Efficiency (COP) | Situation in Luxembourg |
|---|---|---|
| Above 7°C | 300 – 400% | Optimal — spring and autumn |
| Between 0°C and 7°C | 200 – 300% | Good — typical Luxembourg winter |
| Below 0°C | 100 – 200% | Reduced — electric backup may take over |
Because heat pumps cut CO₂ emissions by half compared to gas or oil boilers, the Luxembourg government subsidises them very generously through Klimabonus — up to €14,000 for a geothermal heat pump.
Types of heat pumps
| Type | Energy source | Ideal for | Average COP | Klimabonus |
|---|---|---|---|---|
| Air-source Air / Air | Outside air | Replacing electric radiators, apartments | 3 to 4 | Not subsidised |
| Air-source Air / Water | Outside air | Replacing gas/oil boiler — the most common in Luxembourg | 3 to 5 | ✓ Up to €9,500 |
| Geothermal Ground / Water | Ground (borehole) or groundwater | Large houses, available land, best long-term efficiency | 4 to 6 (up to 500%) | ✓ Up to €14,000 |
| Hydrothermal | Watercourse or groundwater | Specific cases — water source available on the property | 4 to 5 | Subject to conditions |
Exceptional efficiency (up to 500%) but requires vertical drilling of 50 to 150 m. Installation takes several weeks, costing 2 to 3 times more than an air-source heat pump. Best suited to well-planned projects.
Heat pump prices in Luxembourg in 2026
The prices below include equipment and labour. On average, expect 60% equipment and 40% labour costs.
| Heat pump type | Total installation cost | Klimabonus | From (after grants) | Duration |
|---|---|---|---|---|
| Air-source Air / Air | €16,000 – €20,000 | Not eligible | From €16,000 | 1 to 2 days |
| Air-source Air / Water | €16,000 – €24,000 | Up to €9,500 | From €6,500 | 2 to 4 days |
| Geothermal Ground / Water | €30,000 – €40,000 | Up to €14,000 | From €16,000 | 2 to 4 weeks |
Prices collected from partner installers in Luxembourg — 2026. Rates vary by brand, capacity and additional works.
Return on investment: 4 to 6 years
| Profile | Heat pump type | Cost after grants | Savings/year | ROI |
|---|---|---|---|---|
| 100 m² house, gas boiler | Air / Water | From ~€6,500 | €1,500 – €2,500 | 4 to 6 years |
| 150 m² house, oil boiler | Air / Water high power | From ~€9,000 | €2,000 – €3,500 | 4 to 6 years |
| Large house > 150 m² | Geothermal | From ~€16,000 | €3,000 – €5,000 | 5 to 8 years |
What’s the exact cost for your project?
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Get my free quotes →Financial grants for heat pumps in Luxembourg 2026
Luxembourg is one of the most generous countries in Europe for heat pump grants. The following three grants can be combined.
| Heat pump type | Klimabonus | Enoprimes | Total grants |
|---|---|---|---|
| Air / Air | Not subsidised in 2026 | — | |
| Air / Water | €9,500 (with radiator replacement and adaptation) | €1,500 | €11,000 |
| Geothermal | €14,000 (with radiator replacement and adaptation) | €1,500 | €15,500 |
Grants calculated for a 150 m² home in Luxembourg — 2026. Source: klimabonus.lu
Klimabonus — up to €14,000
The main state grant. Apply on klimabonus.lu within 12 months of installation. A prior energy audit is mandatory (costs reimbursed up to €1,500). Reserved for resident homeowners in Luxembourg.
Enoprimes — €1,500
Grants paid by Creos or your energy supplier (Enovos). Apply to your electricity supplier after commissioning.
Reduced VAT at 3%
On all works in a home over 2 years old. On a €20,000 installation, this represents savings of approximately €2,800. Applied directly on the installer’s invoice.
Municipal grants — up to €3,000
Some municipalities offer additional grants. Check with your local authority — amounts and conditions vary.
Eligibility conditions for grants
Performance requirements (minimum COP)
| Heat pump type | Minimum COP required | Test method |
|---|---|---|
| Air / Water | COP ≥ 3.1 | E4/W35 — outside air at 4°C, output water at 35°C |
| Geothermal | COP ≥ 4.3 | B0/W35 — ground fluid at 0°C, output water at 35°C |
The heat pump must also have integrated variable speed and power modulation, an outdoor temperature sensor, and cover at least 70% of annual heating needs.
Noise requirements
| Heat pump capacity | Maximum noise level |
|---|---|
| ≤ 5 kW | 48 dB(A) |
| 5 to 12 kW | 51 dB(A) |
| > 12 kW | 55 dB(A) |
Two approved solutions: additional soundproofing equipment, or limiting noise to 40 dB(A) at the property boundary. A professional acoustic assessment will then be required.
How to apply for heat pump grants in 20262026
Plan your project
Choose between an air-water or geothermal heat pump based on your home and budget. Run a personalised simulation of costs and grants. Consider whether you want to combine it with a full energy renovation — grants are even higher in that case.
Get a personalised quote
Choose a certified installer with over 10 years of experience, registered for Klimabonus. Compare at least 2 quotes — the difference can reach €3,000 to €5,000 for the same installation.
Energy audit and grant application
Have a mandatory energy audit carried out by an approved expert (reimbursed up to €1,500). Submit your application to the Klima Agency and your energy supplier. Once preliminary approval is granted, work can begin — installation takes 2 to 3 days.
Energy audit, grant applications, works declaration to the municipality — our partner installers guide you through all these administrative steps free of charge.
Request a free quote now. Our certified installers cover all of Luxembourg.
Get my quotes →Advantages and limitations of heat pumps
Exceptional efficiency: 300 to 500% — the best on the market compared to gas or oil boilers
Heating bill reduction of 30 to 70% depending on your current system
CO₂ emissions reduced by 30 to 50% compared to a gas or oil boiler
Improved energy passport — gaining several energy classes on your property
Lifespan of 15 to 20 years with simple annual maintenance
1 kW of power heats approximately 10 to 15 m². For a 100–120 m² home, expect an air-water heat pump of 8 to 12 kW. Beyond 120–130 m², supplementary heating or a second unit may be needed.
Efficiency drops below 0°C — the integrated electric backup takes over. Solutions: keep your existing boiler as backup, choose a hybrid model (heat pump + gas boiler), or install a wood stove and double-flow ventilation as a complement.
How does the installation process work?
Building thermal study
Before any installation, the installer carries out a thermal study to determine the required capacity and choose the right type and model of heat pump for your home.
Design and planning
Design of the hydraulic circuit, component selection (buffer tank, connections) and planning of the outdoor unit location according to noise and neighbour constraints.
Installation (2 to 4 days)
An air-source heat pump installation takes 2 to 4 days (several weeks for geothermal with drilling). Core drilling through the façade may be needed to run ducts between the indoor and outdoor units.
Testing, commissioning and grant file
A series of tests and adjustments to ensure proper operation. You receive a complete file for your Klimabonus grant application. Annual maintenance is then recommended to maintain performance and warranty.
FAQ — Frequently asked questions about heat pumps in Luxembourg
How much does a heat pump cost in Luxembourg in 2026?
An air-water heat pump starts from €6,500 after Klimabonus deduction (gross cost: €16,000 to €24,000). A geothermal heat pump starts from €16,000 after grants (gross cost: €30,000 to €40,000). Air-air heat pumps, not eligible for Klimabonus, start from €16,000. Combined grants (Klimabonus + Enoprimes + 3% VAT) can cover more than half the project.
What grants are available for a heat pump in Luxembourg in 2026?
Three grants can be combined: Klimabonus (€9,500 for air-water, €14,000 for geothermal), Enoprimes (€1,500) and reduced VAT at 3% on works. Some municipalities offer additional grants of up to €3,000. In total, subsidies can cover more than half the project.
Which heat pump to replace a gas boiler in Luxembourg?
The air-water heat pump is generally the best option. Compatible with existing radiators and underfloor heating, eligible for Klimabonus, with a COP of 3 to 5. It can save up to 50% on heating bills. An installer will carry out a thermal study to confirm the right capacity for your home.
How long does it take for a heat pump to pay for itself?
Taking into account heating savings (50 to 70% compared to a conventional boiler) and state grants, a heat pump typically pays for itself in 4 to 6 years in Luxembourg. With a lifespan of 15 to 20 years, you then enjoy many years of net savings.
What are the technical conditions for Klimabonus grants?
The minimum COP required is 3.1 for an air-water heat pump (E4/W35 test) and 4.3 for geothermal (B0/W35 test). The heat pump must have variable speed modulation, an outdoor temperature sensor and cover at least 70% of annual heating needs. Noise standards must also be met depending on capacity.
What is the lifespan of a heat pump and what maintenance is required?
A heat pump has an average lifespan of 15 to 20 years. Annual maintenance is recommended to check key components, monitor refrigerant levels and clean filters. Choose a robust model from the start — it will last longer than an entry-level model.
Do I need a building permit to install a heat pump in Luxembourg?
In most cases, no — but a works declaration to your municipality may be required for the outdoor unit. Some municipalities regulate the minimum distance to neighbours and noise levels. In condominiums, co-ownership approval is often required. Your installer will inform you of the specific requirements.