The project consists in recovering the heat lost in the grey water system (showers, sinks, washing machines, dishwashers, etc.) of a hotel or restaurant by reusing it to heat domestic hot water (large consumption in such facilities). The process involves the recovery of heat via a water-to-water heat pump from a cold source at high temperature throughout the year.<\/p>\n\n\n\n
This technology is particularly suitable for hotels with a high demand for domestic hot water.<\/p>\n\n\n\n
By installing this technology, which has been available on the market for more than 5 years, the company can save on its energy bills and reduce its carbon footprint. However, implementing this measure can be rather complex with a medium-to-long-term return on investment, and requires the temporary shutdown of production during the technical installation stage.<\/p>\n\n\n\n\n\n\n\n
<\/p>\n\n\n\n
The two joint positive effects are as follows:<\/p>\n\n\n\n
The estimated energy savings are around 60% for the domestic hot water production system. This translates into a positive impact on the carbon footprint, particularly if the DHW was initially produced using a fossil fuel (although dependent on the initial energy production method).<\/p>\n\n\n\n
<\/p>\n\n\n\n
Please note: any application for government or non-government subsidies must comply with the \u201cincentive effect\u201d, subject to compliance with the subsidy conditions.<\/strong> SME Packages – Sustainability<\/strong><\/a><\/p>\n\n\n\n Aid for environmental protection<\/strong><\/a><\/p>\n\n\n\n The law of 8 December 2025 on the renewal of the aid scheme for environmental and climate protection provides for the granting of investment aid to SMEs and large companies established in Luxembourg, with a business licence, and carrying out projects that contribute to environmental or climate protection. The following maximum rates apply:<\/p>\n\n\n\n
To ensure that the \u2018incentive effect\u2019 is respected, no binding commitment (signing a quotation; paying an advance) 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 application for subsidies.<\/p>\n\n\n\n\n
\n
This aid supports investments aimed at improving energy efficiency outside buildings. It is intended for initiatives that either reduce energy consumption by at least 20% or achieve energy savings of at least 250 MWh per year.<\/p>\n\n\n\n