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Agent Civil Liability: The New Impact of Infiltrométrie 2.0 in Luxembourg

Agent Civil Liability: The New Impact of Infiltrométrie 2.0 in Luxembourg

A New Regulatory Turning Point for the Luxembourg Market

The real estate sector in Luxembourg City, and more specifically in the Kirchberg business district, is about to undergo a major legal revolution. The new directive on "energy hidden defects," coupled with the mandatory "Infiltrométrie 2.0" (Airtightness 2.0) certification, redefines the scope of real estate agents' civil liability.

In a context where thermal performance has become the primary value criterion, air leakage is now considered a major structural defect by Luxembourg courts. This legislative evolution aims to protect buyers against unforeseen energy bills in residences often sold at premium prices.

What Is "Infiltrométrie 2.0" Certification?

Unlike the simple EPC (Energy Performance Certificate), Air Quality 2.0 is a dynamic atmospheric pressure test measuring parasitic air leaks precisely. In Luxembourg City, this certification is becoming mandatory for any transaction involving a property built after 2018 or that has undergone major energy renovation.

Key Points of the Test for Agents

  • Actual vs. Theoretical Measurement: Unlike on-paper calculations, the test detects flaws in joinery and expansion joints.
  • Localization of Thermal Bridges: Use of thermal cameras coupled with depressurization.
  • Mandatory Audit in Kirchberg: The district, a showcase for sustainable construction, is the first to impose this standard.

Real Estate Agent's Civil Liability at Stake

The real estate agent is no longer a mere sales intermediary; they become the guarantor of the accuracy of technical information. Luxembourg case law now considers that the agent must verify the consistency between the displayed EPC and the reality of the building.

If a buyer in Gasperich or Limpertsberg notices heating overconsumption of more than 20% compared to advertisements, they can sue the agency for "breach of the duty to advise and inform." The new directive specifies that the absence of Infiltrométrie 2.0 certification during the purchase agreement constitutes a presumption of a hidden defect.

Conclusion: Adapting to Protect Your Reputation

This new directive should not be seen as a constraint, but as an opportunity for rigorous professionals. By systematically recommending an Infiltrométrie 2.0 expert, the agent secures their commission and protects their civil liability against future claims that could prove extremely costly. At a time when STATEC notes increased buyer selectivity, technical transparency is the best sales lever in Luxembourg.