Heat pumps for businesses in Luxembourg: guide, grants and ROI 2026
Offices, workshops, shops, hotels-restaurants or production sites: replacing a fossil boiler with a commercial heat pump durably cuts your heating costs, future-proofs your business against the phase-out of fossil fuels and improves your buildings’ energy performance. In Luxembourg a business is not eligible for the residential Klimabonus but for dedicated schemes: the environmental protection aid regime (up to 65% of eligible costs for a small enterprise), SME Packages – Sustainability (70%, up to €17,500) and the general SME investment aid regime. This guide covers heat pump types, sizing, grants, ROI and regulations.
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Beyond cost savings, decarbonising heating has become a regulatory and competitive issue for Luxembourg businesses. Three forces converge:
The planned phase-out of fossil fuels
In Luxembourg, installing gas or oil heating has been banned in new buildings since 1 January 2023. At EU level, subsidies for new fossil boilers ended in early 2025. Betting on an end-of-life fossil boiler today means investing in a technology with no future and exposed to gas-price volatility.
The EPBD directive and tertiary building performance
The recast EU Energy Performance of Buildings Directive (EPBD 2024) requires renovating the worst-performing 16% of non-residential buildings by 2030, then 26% by 2033. Replacing a fossil boiler with a heat pump is one of the most effective levers to improve your energy passport and anticipate these requirements.
Heating bill cut by 2 to 4
With a coefficient of performance (COP) of 3 to 5, a heat pump delivers 3 to 5 kWh of heat per 1 kWh of electricity. On a tertiary building this cuts the heating bill by 50 to 75% versus an oil boiler, while eliminating direct on-site CO₂ emissions.
A commercial heat pump is funded through business schemes (environmental regime, SME Packages, general SME regime), not the residential Klimabonus. Amounts, rates and administrations differ. See our full heat pump guide for detailed technical aspects.
Types of commercial heat pumps
The choice depends on your needs (heating, hot water, process heat, cooling), the existing emitter network and available space. Here are the main families for tertiary and industrial use.
| Heat pump type | Best for | Power | Indicative installed price |
|---|---|---|---|
| Air-to-water | Offices, shops, workshops — most common in tertiary retrofit | 10 kW to > 1,000 kW (cascade) | €12,000 – €24,000 |
| Water-to-water / geothermal | Sites with land — highest efficiency, highest cost | Scalable via boreholes | €20,000 – €40,000+ |
| High-temperature | Retrofit on existing radiators (water up to ~80°C, operation to −20°C) | Up to 200 kW/unit | On quote |
| Reversible VRV / VRF | Office buildings — simultaneous heating, cooling and heat recovery | 20–30 kW+ per unit | On quote (see business AC) |
| Industrial process HP | Process heat (food industry, manufacturing) | Up to ~1,450 kW | Project-specific |
Indicative 2026 ranges for Luxembourg tertiary buildings. Large industrial projects are quoted case by case.
A reversible air-air heat pump (or a VRV/VRF system) provides winter heating and summer cooling from the same equipment. For offices and shops where summer comfort matters, it’s often the most cost-effective solution. See our air conditioning for business guide.
Grants and financing for businesses in 2026
A business has several schemes depending on project size. The right choice is determined with an advisor (House of Sustainability, eHandwierk or Luxinnovation) before committing to the works.
| Scheme | Aid rate | For which projects |
|---|---|---|
| Environmental protection aid regime Renewable-energy axis — a heat pump uses renewable heat | Small: up to 65% Medium: up to 55% Large: up to 45% | Heat pump as renewable heat production |
| SME Packages – Sustainability | 70% · max €17,500 | Energy efficiency project €3,000–€25,000 excl. VAT (heat pump as the measure) |
| General SME investment aid regime | Small: 20% Medium: 10% | Productive investment outside the above regimes |
| Enoprimes | Variable | Complementary energy-savings premium via suppliers |
| Investment tax credit | 18% | Tax credit on ecological/energy-transition assets |
Sources: Guichet.lu (environmental regime, renewed by the law of 8 December 2025 — indicative rates, to confirm by company size and EU framework), SME Packages, SME regime and art. 152bis LIR.
In practice: for a standalone heat pump, the environmental regime (renewable-energy axis) offers the highest rates. For a small overall efficiency project (audit + heat pump + regulation) under €25,000 excl. VAT, SME Packages is often simpler and covers 70%. These state aids don’t stack on the same cost item and are capped by the de minimis rule (€300,000 over three rolling fiscal years). The dedicated SME grants page details the procedure.
The 3% super-reduced rate is for dwellings. Your business is invoiced at the standard 17%, but if VAT-registered it recovers that VAT. VAT is broadly neutral — always compare quotes in amounts excl. VAT.
ROI and payback
High aid, large energy savings and recoverable VAT make the investment especially attractive for a business. Three indicative examples:
| Project | Offices — air-water 40 kW | Hotel-restaurant — water-water 80 kW | Workshop — air-water 20 kW |
|---|---|---|---|
| Total cost excl. VAT | €28,000 | €75,000 | €18,000 |
| Aid (small firm, environmental regime) | − €14,000 (50%) | − €37,500 (50%) | − €9,000 (50%) |
| Out-of-pocket excl. VAT | €14,000 | €37,500 | €9,000 |
| Annual saving vs fossil | ~€3,500/yr | ~€9,000/yr | ~€2,200/yr |
| Payback | ~4 years | ~4 years | ~4 years |
Indicative 2026 simulations. The actual aid rate depends on company size, the chosen regime and case review. VAT recovered separately.
Powering your heat pump with your own commercial solar panels maximises daytime self-consumption and further cuts running costs — the most profitable way to decarbonise a tertiary building.
Sizing and technical prerequisites
Correct sizing is decisive: an undersized heat pump won’t cover peak demand; an oversized one will short-cycle and wear out. Key points for a business building:
Prior audit and heat-loss assessment
An energy audit establishes the building’s real heat losses and the required power. It also conditions access to some grants and helps prioritise any insulation works.
Low-temperature emitters
Heat pumps perform best with low-temperature emitters (underfloor heating, fan coils, oversized radiators). On existing radiators, a high-temperature heat pump can avoid replacing the whole network.
Electrical connection and three-phase
Tertiary-power heat pumps need a three-phase connection and sometimes a Creos capacity upgrade. The panel and protection must be adapted by a licensed electrician.
Outdoor-unit placement
Position the outdoor unit considering noise (see regulations), airflow and maintenance access. In co-ownership or protected zones, a municipal permit may be needed.
Regulations: F-Gas, classified establishments, noise
Fluorinated-gas leak checks (F-Gas)
Heat pumps containing fluorinated gases fall under EU Regulation (EU) 2024/573, applied in Luxembourg by the Environment Administration. Leak-check frequency depends on the charge, in tonnes CO₂-equivalent:
| Charge (t CO₂-eq) | Check frequency | With leak detection |
|---|---|---|
| 5 to < 50 t | every 12 months | every 24 months |
| 50 to < 500 t | every 6 months | every 12 months |
| ≥ 500 t | every 6 months | Leak detection mandatory |
Checks must be performed by a certified technician of a certified company. The operator keeps a logbook and submits data to the administration before 31 March each year.
Depending on power and installation type, your project may fall under classified-establishment law (commodo/incommodo permit). The competent authority varies by class — verify this during the study, especially for high powers and cold-production installations.
Your project step by step
Energy audit and scoping
Have your needs assessed and sized. Also the moment to identify the best-suited aid regime with an advisor.
Study and quote
A professional installer produces a feasibility study and a detailed quote (heat pump type, power, emitters, connection, schedule).
Apply for aid BEFORE the works
File your application with the competent administration. Do not start works before approval — premature commitment can forfeit the aid.
Installation and commissioning
Heat pump installation, electrical and hydraulic connection, commissioning and settings. Keep all invoices.
Aid payout and follow-up
After invoice payment and submission of proofs, the aid is paid. Then schedule F-Gas checks and annual maintenance.
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Mistakes to avoid
Starting works before aid approval
As with all business aid schemes, ordering before the approval notice can invalidate your application.
Confusing Klimabonus and business aid
Klimabonus is residential. For business premises, only business schemes apply — with different rates and administrations.
Under- or oversizing the heat pump
Without a proper heat-loss audit the risk is real. Require a sizing study, not just a €/kW price.
Ignoring the de minimis rule
Cumulative public aid is capped at €300,000 over three years. Declare any other aid already received.
Forgetting F-Gas obligations
Leak checks and logbook are mandatory. Include them in the maintenance contract from commissioning.
FAQ
Can a business get the Klimabonus for a heat pump?
No. Klimabonus is for dwellings. A business funds its heat pump via the environmental protection aid regime, SME Packages Sustainability or the general SME investment aid regime.
What is the aid rate for a business heat pump?
The environmental regime supports the heat pump as renewable-energy production at 30 to 65% depending on company size (up to 65% for a small firm), within EU limits. A small project under €25,000 excl. VAT can go via SME Packages (70%, max €17,500).
Is VAT recoverable?
Yes. The business is invoiced at 17% but recovers that VAT if registered. The 3% rate is for dwellings.
Can several grants be combined?
State aids don’t stack on the same cost item and are capped by the de minimis rule (€300,000 over three rolling fiscal years). An advisor checks the optimal combination.
What maintenance is required for a commercial heat pump?
Installations with fluorinated gases require periodic leak checks (12 months for 5–50 t CO₂-eq, 6 months for 50–500 t, mandatory detection beyond), by a certified technician, with a logbook submitted before 31 March.
Do all radiators need replacing?
Not necessarily. A high-temperature heat pump can work on an existing radiator network (water up to ~80°C). An audit determines the most economical solution.