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Cost guide

What does MVHR installation cost in the UK in 2026?

Last updated: April 2026

Mechanical Ventilation with Heat Recovery (MVHR) is a whole-house ventilation system that extracts stale, moist air from kitchens and bathrooms and replaces it with fresh, filtered air from outside — recovering up to 90% of the heat in the process. It is the gold standard for air quality and energy efficiency in well-insulated homes.

MVHR is particularly popular in new builds and high-spec retrofits, and is increasingly specified in Passivhaus and EnerPHit projects. It is not suitable for older, draughty homes where air leakage is high — the building envelope must be reasonably airtight for MVHR to work effectively.

Installed costs for a typical UK home (3–4 bedrooms) range from £2,500 to £8,000, depending on the unit specification, number of rooms served, and ductwork complexity. VAT is 0% on MVHR systems installed in qualifying dwellings.

What does MVHR installation cost in the UK in 2026?
Price indication per item
£2.500 - £8.000

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Estimated cost
£2,500.00 — £8,000.00
Average
Subsidies may be available for this service. View subsidy information

This is an estimate based on average 2026 prices. Actual costs may vary. Always request multiple quotes for an exact price.

Cost factors

MVHR costs in the UK depend on system size, duct layout, and whether the property is new build or retrofit.

  • MVHR unit (supply only): £800–£3,000
  • Rigid ductwork (new build): £1,000–£3,000
  • Flexible ductwork (retrofit): £1,500–£4,000
  • Installation and commissioning: £500–£1,500
  • Annual filter replacement: £50–£150

New build MVHR (integrated during construction) is significantly cheaper than retrofit installation, where ductwork must be routed through finished rooms. Fully commissioned systems achieve 80–90% heat recovery efficiency.

Why do prices vary?

  • New build vs retrofit: New build MVHR is straightforward and cost-effective. Retrofit installations in existing homes are more complex, requiring ductwork to be hidden in ceiling voids, under floors, or in dedicated chases.
  • Airtightness of the building: MVHR is only effective if the building has an air permeability below 5 m³/m²/hr (ideally below 3). Very draughty older homes are not suitable candidates.
  • System size: Larger homes or those with more rooms requiring ventilation need higher-capacity units with more duct runs, increasing both material and labour costs.
  • Unit specification: Premium units (Zehnder, PAUL, Systemair) offer higher heat recovery efficiency and quieter operation. Budget units may suffice for smaller applications.
  • Commissioning and balancing: Proper commissioning (balancing airflows to each room) is essential for performance and Building Regulations compliance. Expect £200–£500 for independent commissioning.
  • Summer bypass: Units with summer bypass allow cool night air through without heat recovery, preventing overheating in warm weather. This feature adds £100–£300.

Subsidies & incentives

MVHR installation benefits from 0% VAT under the Energy Saving Materials relief (since April 2022). No standalone grant exists specifically for MVHR, but it may be included in whole-house retrofit projects funded through the Warm Homes Local Grant or local authority energy efficiency programmes. In Passivhaus certified new builds, MVHR costs are typically included in the overall build specification.

Regional price differences

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Frequently asked questions

Is MVHR suitable for older UK properties?
MVHR works best in airtight homes — modern builds, EnerPHit retrofits, and recently upgraded properties. Victorian and Edwardian homes are generally too draughty for MVHR to function efficiently. In these properties, a simpler dMEV (decentralised mechanical extract ventilation) system is more appropriate.
Does MVHR reduce heating bills?
Yes, significantly in airtight homes. By recovering up to 90% of heat from exhaust air, MVHR can reduce heat loss through ventilation by 80–90% compared to opening windows. In very well-insulated homes, this can reduce annual heating demand by 20–40%.
Is MVHR required by Building Regulations?
MVHR is one acceptable way of complying with Part F (ventilation) of the Building Regulations. It is not mandatory but is increasingly common in new builds and extensions where high airtightness is achieved under Part L (energy efficiency).
Is VAT 0% on MVHR?
Yes, MVHR systems installed in qualifying dwellings benefit from 0% VAT under the Energy Saving Materials relief, applicable since April 2022.
How noisy is MVHR?
Quality MVHR systems are very quiet when properly installed — typically 25–30 dB in bedrooms at low speed, comparable to a library. Poor duct design or undersized ducts are the main cause of noise issues.

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