Replacing a boiler: organise the project steps
Published on 31 July 2026 · Verified on 18 September 2026 · The Mestravaux.lu team
The schedule depends on the installation, equipment and applicable procedures. Build it with the participants, identifying decisions needed before each step instead of relying on a standard duration.
The essentials in 30 seconds
- Define the assessment and necessary documents.
- Confirm procedures before making commitments.
- Prepare service interruptions and document handover.
Prepare the visit
Gather boiler references, available reports, consumption and insulation plans. Agree the visit’s scope and any charge. Ask which measurements and accessible areas are needed.
| Étape | Délai | Budget / action |
|---|---|---|
| Diagnostic & devis | 1 – 2 semaines | Gratuit à 150 € |
| Comparaison & choix du système | 1 – 2 semaines | Comparer au moins 3 devis |
| Dossier Klimabonus (si éligible) | 2 – 4 semaines | À déposer avant travaux |
| Dépose ancienne chaudière + cuve | 0,5 – 1 jour | 800 – 3 000 € si cuve fioul |
| Installation & mise en service | 1 – 3 jours | 5 000 – 28 000 € selon le type |
| Solde Klimabonus après facture | Plusieurs semaines | Justificatifs fournis par l'installateur |
| Premier entretien annuel | À J+12 mois | 120 – 300 € |
Délais indicatifs Luxembourg 2026, hors périodes de forte demande (automne-hiver) où les créneaux d'installation peuvent s'allonger.
Choose with an explicit scope
Specify the selected solution, sizing, retained components and adaptations. Compare offers on equivalent scopes. Identify open choices and their effects on ordering or scheduling.
Check project procedures
Consult the Klimabonus procedure for the equipment and investment dates. Prefinancing planned for certain investments from 1 January 2027 differs from the ordinary procedure. Also ask the municipality whether the proposed installation needs permission.
Organise removal and access
Have competent contractors define removal and the treatment of any tank. Specify access, protection, disposal and coordination. Agree the period without heating or hot water and any necessary temporary arrangement included in the contract.
Your project deserves an accurate estimate — it's free.
Request a quotePrepare commissioning and documents
Ask the installer about applicable checks and acceptance procedures, settings, instructions and documents to be supplied. Plan user explanations and a list of outstanding points. Physical installation alone does not conclude every procedure.
Organise follow-up
Retain invoices, certificates and equipment references. Check the documents and deadlines for any grant application. Schedule maintenance and applicable checks; for gas, Creos specifies inspection every four years. The contract should identify services and exclusions.
Frequently asked questions
How many weeks should I allow?
Request a project schedule covering availability, delivery, procedures and service interruptions. We do not publish a universal duration.
Does the installer handle every grant application?
Specify in writing who prepares, signs and submits each document. Commercial assistance does not replace administrative conditions.
Take action
Your project deserves an accurate estimate — it's free.
Request a quote