Cost: mechanical extract ventilation
Replacing a unit and creating a complete system are different scopes. Compare equipment, ducts, air inlets, external discharge, connections and finishes separately.
Editorial update on 18 September 2026
Compare matching scopes
For replacement, list retained and adapted parts. For a new system, request assessed duct lengths and routes, access, penetrations and finishes. A single ventilation equipment line does not make quotes comparable.
Make extras explicit
Ask whether power supply, external outlet, operating measurements and making good are included. Record assumptions about inaccessible ducts and conditions for additional charges following inspection.
Agree completion checks
Request checks, handover documents and maintenance instructions for the installed model. Clarify local procedures and permissions for shared property or façades. French references do not establish regulatory compliance in Luxembourg.
The three budget levels
Where your money goes
- AssessmentOn quotationConfiguration and retained components.
- EquipmentOn quotationUnit, terminals and inlets.
- Ductwork and dischargeOn quotationRoutes, access and external outlet.
- Connection and completionOn quotationElectricity, tests and making good.
What makes the price vary
Ductwork
Route, condition and access.
Building envelope
Openings and making good.
Acoustics
Location and proposed treatment.
Service
New installation, replacement or assessment.
Indicative scenarios
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Can I replace only the motor?
Have the model and ductwork checked. Replacing a unit alone does not establish correct operation of the complete system.
Does humidity control guarantee savings?
Request a comparison based on the system and its use. No savings percentage is guaranteed here.
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