What is the price of a ventilation system (MVHR) installation in Luxembourg in 2026?
In Luxembourg, the price of a controlled mechanical ventilation (CMV) installation ranges from €1,500 to €18,000 depending on the type of system and the property size. A humidity-controlled single-flow MEV costs between €1,500 and €4,500 supplied and installed; a centralised dual-flow MVHR between €6,000 and €18,000. These rates reflect the Luxembourg market reality, where labour costs are structurally higher than in France or Belgium. In 2026, only dual-flow MVHR (with heat recovery) is eligible for Luxembourg Enoprimes grants. Both systems benefit from the super-reduced 3% VAT rate for any property over 10 years old — representing a 14-point VAT saving on the entire invoice. This page compiles all verified rates, the factors that affect prices, and the exact details of every grant available in the Grand Duchy.
Summary of 2026 prices by ventilation type in Luxembourg — supplied and installed
The ranges below reflect the Luxembourg 2026 market: they include equipment supply, installation by a certified contractor, the duct network, vents and commissioning. They do not include any additional works (dropped ceilings, new electrical connection, load-bearing wall penetrations).
| Ventilation type | Area covered | Price supplied + installed (Luxembourg 2026) | Enoprimes eligible |
|---|---|---|---|
| Self-regulating single-flow MEV | Up to 120 m² | €1,200–2,500 | ✗ |
| Humidity-controlled type B MEV | Up to 120 m² | €1,500–3,500 | ✗ |
| Humidity-controlled type B MEV | 120–200 m² | €2,500–4,500 | ✗ |
| Decentralised dual-flow MVHR (room-by-room units) | Apartment 60–90 m² | €4,000–8,000 | ● |
| Decentralised dual-flow MVHR | House 90–150 m² | €6,000–11,000 | ● |
| Centralised dual-flow MVHR — entry-level heat exchanger (efficiency 70–80%) | House 80–120 m² | €6,000–10,000 | ● |
| Centralised dual-flow MVHR — mid-range (efficiency 80–90%) | House 80–150 m² | €8,000–13,000 | ● |
| Centralised dual-flow MVHR — high-end (efficiency >90%, very quiet) | House 120–250 m² | €11,000–18,000 | ● |
| Like-for-like ventilation replacement (existing duct network retained) | All sizes | €1,500–4,500 depending on type | ◐ (MVHR only) |
Indicative ranges, Luxembourg market 2026 — collected from certified contractors. The 3% VAT rate is already included in the ranges above (property >10 years, primary residence). For a recent property (<10 years), apply the standard 17% VAT rate to the pre-tax amount.
Luxembourg applies the building sector collective agreement, with labour rates of €65–95/h for a specialist ventilation contractor — versus €40–65/h in France. On a dual-flow MVHR installation requiring 3 to 5 days’ work, this represents an extra cost of €1,500 to €3,000 compared to French quotes. This is the Grand Duchy market reality, and any abnormally low quote should prompt questions about installation quality or the contractor’s qualifications.
Cost breakdown: equipment, labour, ducting and accessories
A complete ventilation quote is broken down into five main items. Understanding their respective weight allows you to compare offers on a like-for-like basis and identify incomplete quotes.
Item 1 — The central unit
This is the heart of the system. The price varies considerably by technology:
- Self-regulating single-flow MEV: €150–400 (unit only)
- Humidity-controlled type B MEV: €300–600 (unit + humidity vents included)
- Entry-level dual-flow MVHR: €1,200–2,500 (efficiency 70–80%)
- Mid-range dual-flow MVHR: €2,000–4,000 (efficiency 80–90%, summer bypass)
- High-end dual-flow MVHR: €3,500–6,000 (efficiency >90%, very low electricity consumption, very quiet)
High-end dual-flow models systematically include a summer bypass (freecooling), advanced electronic controls and a noise level below 30 dB — essential elements for comfort in a Luxembourg residential property.
Item 2 — The duct network
This item is often underestimated yet represents 15 to 30% of the total budget for a dual-flow system. Expect:
- Flexible insulated ducts (Ø 80–125 mm): €5–8/lm materials
- Rigid insulated ducts (Ø 80–125 mm): €7–12/lm materials (recommended for dual-flow)
- Duct installation: €15–35/lm labour depending on accessibility (accessible loft vs. dropped ceiling to create)
- Complete network for 100 m² house (single-flow): 50–70 lm of ducts ≈ €1,000–2,500 installed
- Complete network for 100 m² house (dual-flow): 80–120 lm of ducts (two circuits) ≈ €2,000–4,500 installed
Item 3 — Extract and supply vents
- Standard extract vent: €20–40 each + €40–70 installation
- Humidity-controlled vent (hygro B MEV): €30–80 each + €40–70 installation
- Dual-flow supply diffuser (design): €40–80 each + €50–80 installation
- Air inlets (window or façade): €15–50 each + €30–60 installation
- Number of vents for 4-wet-room + 4-living-room house: 8–16 units in total
Item 4 — Electrical connection and accessories
- Electrical connection to panel: €150–400 if no socket nearby
- Wall control interface (dual-flow): €100–300
- Electric frost protection preheating (very exposed areas): €500–1,200
- Fresh air intake + exhaust air outlet (dual-flow): €200–600 (roof or façade penetration)
Item 5 — Installation labour and commissioning
Labour represents 40 to 55% of the total cost of a ventilation installation in Luxembourg, due to high hourly rates and longer installation time in renovation:
- Single-flow MEV in renovation: 1 to 2 days = €600–1,800 labour
- Dual-flow MVHR in renovation (accessible loft): 3 to 5 days = €2,000–4,500 labour
- Dual-flow MVHR without accessible loft (dropped ceilings to create): 4 to 7 days = €3,000–6,500 labour
- Airflow measurement and balancing at end of project: €200–500 (essential for dual-flow)
A low quote frequently conceals three items not included: (1) the complete duct network — some contractors offer a central unit without the ducts, to be purchased separately; (2) commissioning and airflow balancing, essential for the ventilation to actually be effective; (3) wall, slab or roof penetrations for air intake and exhaust. Always require that these three items be explicitly mentioned in your quote before comparing it with others.
The 6 factors that affect the price of a ventilation installation in Luxembourg
Loft accessibility
This is the most impactful factor on labour costs. An accessible, clear loft with sufficient headroom allows the contractor to install ducts from the loft without creating dropped ceilings. Expect a 30 to 40% labour surcharge when the loft is inaccessible or non-existent (apartment, flat roof), as all ducts must run through dropped ceilings to be built or in surface-mounted trunking. This is often the factor that tips the choice from centralised dual-flow to a decentralised solution in an apartment.
Property configuration: floor area and number of storeys
The floor area determines the duct run length, the unit capacity and the number of vents. A 200 m² house over two storeys requires a duct network twice as long as a 100 m² single-storey house, and a more powerful unit. Multi-storey houses require vertical duct runs that complicate the installation and increase the linear duct run by 20 to 40% compared to a single-storey house.
New build vs. renovation
In new build, the duct network is integrated before plasterboard is installed and before slabs are poured: installation is 30 to 50% cheaper in labour. In renovation — the most common case in Luxembourg — ceilings and partitions must be drilled, finishes reinstated, and partial dropped ceilings sometimes created. This renovation surcharge is systematically factored into the price ranges given on this page.
Product tier and heat exchanger efficiency (dual-flow)
Moving from a 75% efficiency exchanger to a 90% model means a difference of €1,500 to €2,500 on the unit price, but generates additional savings of €150 to €300/year on heating in a well-insulated Luxembourg property. Over a 15-year service life, this extra cost can be fully recovered. High-end models also include better acoustic treatment — important in a high-quality home where night-time quiet is a comfort criterion.
Existence of a pre-existing duct network
If you are replacing an existing single-flow MEV whose ducts are still in good condition, it is sometimes possible to reuse the existing extract network for the new single-flow system, reducing the cost to €1,500–2,000. On the other hand, upgrading from single-flow to dual-flow always requires a complete second supply duct network — the existing network cannot be reused for both circuits. The condition of existing ducts must be checked: ducts that are perforated, warped or mouldy must be fully replaced to guarantee efficiency and air quality.
Additional works specific to your property
Some items can be added to the base quote: penetrating a load-bearing wall for the main duct run (€100–300), ceiling reinstatement after duct installation (€50–200/m²), creating a plant room to house the dual-flow unit in a house without a loft (€500–1,500), acoustic insulation of the plant room (€200–600), or installation of an electric inlet air preheating element for very harsh Luxembourg winters (€500–1,200). Ask your installer to list these items during the preliminary technical survey.
Prices by typical scenario in Luxembourg 2026
To illustrate the ranges above concretely, here are four representative projects from the Luxembourg housing stock with their estimated total budget — including 3% VAT.
| Scenario | Recommended solution | Estimated total budget incl. VAT (3%) |
|---|---|---|
| 70 m² apartment in a block, unrenovated building, loft inaccessible | Humidity-controlled type B MEV or decentralised MVHR depending on building airtightness | €1,800–6,500 |
| 1980–2000 house, 120 m², partially renovated, accessible loft | Centralised dual-flow MVHR, entry/mid-range | €7,000–11,000 |
| Older 180 m² house, comprehensive renovation targeting BBB energy class, convertible loft | High-end centralised dual-flow MVHR (efficiency ≥90%, summer bypass) | €12,000–18,000 |
| Like-for-like replacement of a failed single-flow MEV, duct network retained | Humidity-controlled type B MEV (same duct network, unit only replaced) | €1,500–2,800 |
Zehnder or Aldes dual-flow unit, 85% efficiency, summer bypass included: €2,800
Dual-circuit duct network (100 lm) supplied + installed: €3,500
Extract + supply vents (14 units) + air inlets: €1,200
Fresh air intake + roof exhaust (penetrations included): €600
Electrical connection + control interface: €400
Installation labour + balancing + commissioning: €3,200
Total excl. VAT: €11,700 | VAT 3%: €351 | Total incl. VAT: €12,051
Without 3% VAT (standard rate 17%): €13,689 incl. VAT — VAT saving: €1,638
Grants available in Luxembourg in 2026 for ventilation
The Grand Duchy offers several financial levers to reduce the cost of a ventilation installation. They can be combined, but each follows strict application rules and timelines.
1. Enoprimes — grant for ventilation with heat recovery
The Enoprimes are grants from Luxembourg energy suppliers (Enovos/Encevo, Creos and other approved suppliers). A specific grant exists for ventilation with heat recovery, meaning only dual-flow MVHR. Single-flow MEV is not eligible for the Enoprimes ventilation grant.
The Enoprimes grant amount is calculated based on energy savings generated (ventilated area, exchanger efficiency, projected airflow, existing heating type). It is not fixed: it is calculated individually by an approved Enoprimes partner when preparing the quote. Indicative ranges are available on enoprimes.lu.
The Enoprimes application must be submitted before signing the installation quote. Any quote signed without prior Enoprimes agreement permanently invalidates the right to this grant. In practice, your Enoprimes partner contractor submits the application on your behalf at the same time as the quote is issued.
2. Klimabonus Wunnen 2026 — as part of a comprehensive renovation
Dual-flow MVHR is not a piece of technical equipment subsidised in isolation by the Klimabonus in the same way as a heat pump. However, within a comprehensive energy renovation with energy advisory, dual-flow MVHR contributes to improving the CPE (Energy Performance Certificate) class of the property — and it is this improvement that is rewarded by the Klimabonus. The more energy classes the overall renovation improves, the higher the Klimabonus subsidy rate (up to 62.5% of investment costs for the best renovations).
For single-measure projects (MVHR only, without comprehensive renovation), refer to the conditions of the Klimabonus without energy advisory, limited to a single element scheme available on guichet.lu.
The agreement in principle from the one-stop housing aid desk must be obtained before any works begin. Without this prior agreement, no Klimabonus aid can be paid, even if works comply with all requirements. The 2026 Klimabonus applies retroactively from 1 January 2026, subject to publication of the law in the Mémorial.
3. Super-reduced 3% VAT — applicable to all systems
This is the most systematic and administratively straightforward measure: any ventilation installation in a property over 10 years old used as a primary residence benefits from the super-reduced 3% VAT rate — versus the standard rate of 17% in Luxembourg. This 14-point saving applies to the entire invoice (materials + labour), up to a works limit of €357,000. It is automatic as long as works are carried out by a contractor registered with the Luxembourg Chamber of Trades.
Pre-tax invoice €3,000 (single-flow): VAT 3% = €90 | VAT 17% = €510 → Saving: €420
Pre-tax invoice €10,000 (dual-flow): VAT 3% = €300 | VAT 17% = €1,700 → Saving: €1,400
Pre-tax invoice €15,000 (dual-flow large house): VAT 3% = €450 | VAT 17% = €2,550 → Saving: €2,100
4. Klimaprêt (climate loan) — subsidised rate financing
The Luxembourg government offers the Klimaprêt through partner banks: a loan to finance energy renovation works at a subsidised interest rate. The government covers 1.5% of the interest rate, up to 10% of the principal loan amount. This allows the residual cost after grants to be financed without disbursing the full amount immediately. Contact the BCEE or your main Luxembourg bank for details.
5. Municipal grants
Some Luxembourg municipalities offer additional grants for energy renovation works on their territory. Amounts and conditions vary considerably from one municipality to another: some (such as Strassen, Mamer, Luxembourg City) are particularly active in this area, while others have no scheme at all. Always check with your municipal authority before starting works — if it exists, a municipal grant can add several hundred additional euros to your subsidy package.
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Simulate my grants →Out-of-pocket cost after grants: worked examples
To illustrate the cumulative impact of Luxembourg grants on the actual residual cost, here are two concrete verified examples.
| Scenario | Total cost incl. VAT before grants | 3% VAT (saving vs 17%) | Enoprimes (estimate) | Estimated out-of-pocket cost |
|---|---|---|---|---|
| Humidity-controlled type B MEV, 120 m² house, replacing failed unit | €2,800 | −€392 (VAT saved) | Not eligible | ≈ €2,400 |
| Centralised dual-flow MVHR, 120 m² house, accessible loft, mid-range | €10,300 | −€1,442 (VAT saved) | −€400 to €800 (estimate) | ≈ €8,100–8,500 |
| Centralised dual-flow MVHR included in comprehensive renovation (Klimabonus, insulation + MVHR + heat pump) | €12,051 (MVHR share) | −€1,638 (VAT saved) | −€400 to €800 | ≈ €9,600–10,000 + Klimabonus grant on overall performance |
Enoprimes ventilation amounts are estimates — the exact amount is calculated individually by an approved Enoprimes partner when preparing the quote. Klimabonus grants on the comprehensive renovation are not included here as they depend on the overall project (property type, CPE classes before/after, total renovated area).
Dual-flow MVHR reaches its full financial and technical value when integrated into a comprehensive renovation project combining insulation, heating replacement and ventilation. In this context, Klimabonus grants on the final building performance can cover up to 62.5% of investment costs — a proportion that radically changes the residual cost compared to a standalone MVHR installation.
Annual maintenance costs to budget for
The total cost of ownership of a ventilation system does not stop at installation. Here are realistic maintenance costs on the Luxembourg market, which must be included in your return on investment calculation.
| Operation | Humidity-controlled type B MEV | Dual-flow MVHR | Frequency |
|---|---|---|---|
| Cleaning extract and supply vents | Owner — €0 | Owner — €0 | Every 3 months |
| Filter replacement (supply + extract air) | Not applicable | €20–60 / filter set | Every 3 to 6 months |
| Heat exchanger cleaning | Not applicable | €50–150 (professional) | Annual |
| Duct inspection and cleaning | Included in professional check — see below | Included in professional check — see below | Every 5 years |
| Full professional check (airflow, airtightness, balancing) | €100–180 | €150–300 | Every 3 years |
| Estimated average annual cost | €35–60/year | €120–280/year | — |
Over a service life of 15 to 20 years, the cumulative additional maintenance cost of dual-flow vs. single-flow represents approximately €1,200 to €3,300 — a line to include in the return on investment calculation, alongside the heating savings generated by heat recovery.
Rigorous filter maintenance is the number one factor in the longevity of a dual-flow MVHR. A clogged exchanger can see its efficiency drop from 90% to 60%, cancelling out almost all the heating savings and increasing fan electricity consumption by 15 to 20%. Replacing filters every 3 to 6 months is a €20–60 investment that protects your €10,000–18,000 installation.
How to read and compare a ventilation quote in Luxembourg
Receiving several quotes is essential, but comparing them correctly even more so. A complete and serious ventilation quote must include the following elements.
Precise equipment identification
Brand, model and exact reference of the central unit, heat exchanger efficiency (dual-flow), declared noise level in dB(A), fan electrical power. Without this information, you cannot compare two offers — a €1,500 unit and a €3,000 unit are not equivalent even if both are described as « centralised dual-flow MVHR« .
Duct network detail
Type of ducts (flexible or rigid, insulated), total planned length (lm), diameters. This item must be priced separately from the unit. A quote that consolidates everything into a single line « supply and installation dual-flow MVHR: €8,500″ does not allow you to know whether ducts are included or not.
Number and type of vents
Number of extract vents (wet rooms), number of supply diffusers (living rooms, dual-flow only), type of vents (standard, humidity-controlled, design). This line tells you how many rooms will actually be served by the system.
Commissioning and airflow balancing
Commissioning includes vent-by-vent airflow measurements using an anemometer, and adjustment of regulators to meet the required airflow rates. Without this step, your ventilation system may be technically installed but not compliant with regulations and in practice ineffective. Request that this operation be explicitly included in the quote.
VAT rate stated
A serious Luxembourg quote explicitly states the VAT rate applied: 3% for property >10 years (primary residence) or 17% (standard rate). If your quote is unclear on this point, request written confirmation before signing — the difference represents 14 points on the entire invoice.
Registration with the Luxembourg Chamber of Trades
Check that the contractor is registered with the Luxembourg Chamber of Trades (CdM) — this is the legal condition to carry out a trade in the Grand Duchy. For Enoprimes grants, the contractor must also be an approved Enoprimes partner. For the Klimabonus, the contractor must be approved by the Klima-Agence. These qualifications are distinct from the French RGE certification, which has no legal standing in Luxembourg.
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Frequently asked questions about ventilation installation prices in Luxembourg
How much does replacing an existing ventilation unit cost in Luxembourg?
If the existing duct network is in good condition (prior check essential), replacing a single-flow unit with a new humidity-controlled type B model costs between €1,500 and €2,800 — installation and 3% VAT included. Replacing an existing dual-flow MVHR unit with a higher-performance model, reusing the duct network, costs between €3,000 and €6,500 depending on the model chosen. If the ducts are worn (perforated, warped, over 20 years old), their complete replacement adds to the budget: allow €1,000 to €3,500 for the full network depending on the floor area.
Does the 3% VAT rate apply to both types of ventilation?
Yes. The super-reduced 3% VAT rate applies to any ventilation installation (single-flow MEV and dual-flow MVHR) in a property over 10 years old used as a primary residence in Luxembourg, provided works are carried out by a contractor registered with the Chamber of Trades. This 10-year age condition has been reduced (it was previously 20 years under the old scheme) under the 2026 Klimabonus. For properties under 10 years old, the standard 17% VAT rate applies.
Can I install a ventilation system myself to save on labour?
Technically possible for single-flow, but strongly inadvisable for three reasons: (1) the 3% VAT rate is reserved for works carried out by a professional registered with the Chamber of Trades — a self-installation is subject to 17% VAT on materials; (2) Enoprimes grants require the intervention of an approved Enoprimes partner; (3) a poorly dimensioned or poorly balanced installation can cause air quality problems, condensation in ducts or noise nuisance, without any recourse. For dual-flow MVHR, self-installation is technically unsuitable without professional balancing equipment.
Does the price vary depending on the ventilation brand chosen?
Yes, significantly for dual-flow MVHR. Premium brands available in Luxembourg (Zehnder, Brink, Duco, Paul Wärmerückgewinnung) charge 20 to 40% more for their units than entry-level brands — but offer higher efficiencies (up to 95%), longer service lives and very low noise levels (25–30 dB) essential in residential settings. For single-flow, differences between brands (Aldes, Atlantic, Unelvent, France Air) are less pronounced: the material cost remains in the €300–600 range for humidity-controlled type B, regardless of manufacturer.
Are there additional grants for low-income households in Luxembourg?
Yes. The Social Topup of the 2026 Klimabonus allows the Klimabonus aid amount to be doubled for households whose income does not exceed certain thresholds. If your household is eligible for the Social Topup, the grant on the overall renovation performance can be multiplied by two. The exact eligibility conditions for the Social Topup are available on guichet.lu. The Klimaprêt (subsidised loan) can also be combined with the Social Topup to finance the residual cost without immediate disbursement.
How long should I allow between the quote and installation in Luxembourg?
Allow 4 to 10 weeks between first contact and actual works start, depending on contractor availability. This timeline extends further if you wish to obtain Klimabonus grants: the agreement in principle application and its processing by the one-stop desk can take an additional 2 to 6 weeks depending on the period. Plan your project at least 3 months in advance, particularly if you want to complete works before the autumn heating season. A dual-flow MVHR that starts in December without a recorded agreement in principle could cost you several thousand euros in lost grants.
Is dual-flow MVHR cost-effective in Luxembourg?
In a well-insulated property (airtightness n50 < 1.5 h⁻¹), dual-flow MVHR is cost-effective over the system’s service life (15–20 years), provided it is integrated into a comprehensive renovation maximising grants. Taken in isolation in a poorly insulated property, its cost-effectiveness based solely on heating savings is limited (return on investment of 15 to 20 years). But purely energy-based cost-effectiveness is not the only measure: air quality, thermal comfort without draughts, elimination of humidity problems and property value enhancement (moving to CPE class BBB/AAA) represent benefits that are difficult to quantify but real on the Luxembourg market, where the CPE directly influences resale value.
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