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Mechanical workshop : Heat recovery from paint booths

Energy
Craft Industry
Manufacturing
[ Detailed version of the measure ]
Last update: 16/02/2026
  • Subsidies available
  • Innovative solutions

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.

Heat recovery from paint booth extraction system

In order to protect personnel from exposure to solvents and to eliminate their accumulation, thereby reducing the risk of explosion, the air inside the paint booth is filtered and extracted before being discharged into the atmosphere. The air released into the atmosphere is replaced by fresh air drawn from outside. This air is then heated and use as renewal air in the paint booth.

The measure aims to install a plate heat exchanger in the hot air extraction circuit of the paint booth to preheat the renewal air and will significantly reduce the energy consumption associated with heating this air.

The measure can lead to a substantial reduction in heating consumption and therefore also reduce the associated greenhouse gas emissions. The installation of this technological innovation requires a production shutdown for implementation and would entail a medium-to long-term return on investment.

Miscellaneous savings

Installing a heat recovery unit with a plate heat exchanger will generate significant financial savings, mainly by reducing heating consumption through the recovery of heat from extracted air in order to warm the incoming fresh air.

If heating is provided by a fuel combustion system, this measure can help reduce greenhouse gas emissions.

The air renewal flow rate can be controlled and managed as needed.s.

State subsidy application

State subsidies

Please note: any application for government or non-government subsidies must comply with the “incentive effect”, subject to compliance with the subsidy conditions.

To ensure that the incentive effect of the aid is respected, no binding commitments may be made (acceptance of a quote; advance)

N.B. While several state subsidies cannot be granted for the same project, they can be combined with supplier subsidies.

Subsidies from electricity and natural gas suppliers

Since 2015, natural gas and electricity suppliers are 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 amount of the premium is proportional to the annual energy saving. The following suppliers offer this service for companies:

N.B. Supplier subsidies can be combined with a state subsidy for the same project.

Tax relief for investment in an ecological and energy transition project

The tax relief is calculated based on the investments and operating expenses incurred as part of an ecological and energy transition project.
The tax relief rate is set at 18% and is applied directly to the amount of tax due.
This deduction can be combined with standard state subsidies.

For the project to be eligible, it must meet at least one of the following objectives:

  • Improve the energy efficiency of a production process
  • Improve the material efficiency of a production process
  • Decarbonise a production process
  • Reduce air pollution at the production site (excluding CO2 emissions)
  • Produce or store renewable energy for self-consumption
  • Promote the extended use of products through reuse

For certain objectives, minimum thresholds must be met.
To verify your eligibility and ensure that these thresholds are satisfied, it is recommended that the impact of the measure on one of the above conditions be certified by an expert or a design office.

Further details and conditions: Guichet.lu
For questions: Ministry of Economy – Bonus

This type of project may be eligible, provided that the implemented project relates to the company’s main economic activity, the eligibility thresholds are met, and that all other criteria set out in Article 152bis L.I.R. are complied with.

Implementation aid

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