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Installation of a new domestic hot water (DHW) production system

Agriculture, viticulture
Aid and care sector
Craft Industry
[ Detailed version of the measure ]
Last update: 18/04/2024
  • Possibility of assistance
  • Subsidies available

To make this measure more effective and tailored to the specific context of your company, we recommend that you first perform an overall analysis of your energy situation.

Changing your domestic hot water system

The use of domestic hot water varies from company to company. In some cases, it is used for sanitary installations and cooking, while in others, hot water is used for manufacturing or to assist in the production of materials or services. As a result, it is important to put in place the right solution, tailored to the specific situation.

Below is an approach that shows the stages and benefits of changing your domestic hot water (DHW) production system.

Definition of requirements for the domestic hot water system

Analysis of the current situation

  • Determine the parameters of the installation, e.g. age, general condition, temperature level, consumption, and associated costs, etc.
  • Define current domestic hot water consumption. The following elements provide a reliable assessment of the situation:
    • meter readings
    • monthly drinking water bill
    • consumer inventory (flow rate, temperature, schedule, etc.)

Identifying the domestic hot water system best suited to requirements

Decentralised or centralised system

  • If consumption is low, check whether using cold water is not sufficient or encourage the installation of electric water heaters – e.g. for hand-washing facilities in an office building.
  • Where consumption is high, a centralised solution is preferable. In this case, you need to define the power of the system (flow rate, temperature, schedule, etc.)

Definition of the solution

Note: a permanent circulation pump must be incorporated into sanitary networks above a certain size.

Verification of the project with regard to operating permits

  • When adapting existing facilities, and particularly when setting up new facilities, check the nomenclature for classified establishments.

Drafting specifications and requests for tenders

Subsidy application

Government subsidies

To respect the “incentive effect”, no binding commitment (signing a quotation; paying a deposit) may be made BEFORE submitting the application file or receiving the agreement in principle from the State or the electricity and natural gas supplier following an aid application.

Temporary environmental impact aid

Extended “SME Packages Sustainability” aid scheme, to give companies greater incentives to invest in measures that significantly improve their environmental impact. Investments under this climate protection measure amount to 70 % for small businesses, 60 % for medium-sized businesses and 50 % for large businesses for projects costing more than €7 500, with a maximum aid amount of €100 000.

Fit 4 Sustainability” programme

  • The “Fit 4 Sustainability” programme provides co-financing for an environmental audit and action plan on one or more topics chosen by the company (energy, greenhouse gases, waste, water, etc.)
  • Subsidies of up to 50 %, 60 % and 70 % of the fees for carrying out an environmental study (energy audit and/or carbon footprint) + detailed, costed action plan to reduce consumption/GHGs (greenhouse gases) (medium- and long-term investment, ROI, etc.) – open to SMEs and large companies (except those required to carry out a statutory audit)
  • Any questions? Luxinnovation

SME Packages – Sustainability

  • Flat-rate aid of €5,000 for small and medium-sized businesses for projects to reduce their environmental impact, costing between €6,650 and €25,000 excluding VAT
  • Any questions?

Environmental protection scheme – Investment aid for the protection of the environment

SME aid scheme – Aid for miscellaneous investments

Subsidies for small and medium-sized businesses , up to 10 % or 20 % of the amount of miscellaneous investments aimed at promoting the modernisation and competitiveness of the Luxembourg economy.

N.B. State subsidies cannot be combined for the same project.

Application for subsidies from electricity and natural gas suppliers

Since 2015, natural gas and electricity suppliers have been required to make energy savings for consumers under the obligation scheme. Since then, energy suppliers have been offering support and advice, as well as subsidy programmes for consumers to implement energy efficiency measures.

The following suppliers offer this service for companies:

N.B. Energy supplier subsidies can be combined with any state subsidy for the same project.

After completion of the works

If the heat production unit is changed, the installation must be inspected by an official from the Chambre des Métiers

Inspection of all new heating installations running on diesel, solid fuel or gas by the Department for the Inspection and Approval of Buildings (SCRB) of the Chambre des Métiers.

Planning maintenance and periodic inspection of the installation

Implementation aid

Contact us

I would like more information on:

  • Fit 4 Sustainability
  • Government subsidies
  • Support
  • Identifying partners

I would like more information on:

  • Klimabonus subsidies or photovoltaic and electromobility subsidy programmes
  • A technical aspect of the measure
  • A specific tool
  • A technical aspect of the site (404 link, etc.)

Contact Klima-Agence