A whole-house ventilation system can transform how a home feels, particularly when new windows, insulation and draught-proofing have made it warmer but less naturally ventilated. The MVHR installation cost is therefore not simply the price of a fan unit. It covers a designed system of ductwork, valves, controls and commissioning that supplies filtered fresh air without throwing away the heat you have paid to generate.
For homeowners in Essex, Suffolk, Hertfordshire and Kent, the right budget depends largely on whether MVHR is being fitted during a build, a major renovation or into a finished property. Access to floors, ceilings and service voids has a significant effect on the final figure.
Typical MVHR installation cost for UK homes
As a broad guide, a well-designed MVHR system for a typical new-build home may cost around £5,000 to £9,000 supplied and installed. A retrofit project commonly falls between £8,000 and £15,000, while larger properties, listed buildings or homes with difficult access can exceed this range.
These figures should be treated as a starting point, not a fixed menu price. A compact, straightforward system in a new build is easier to install while rooms are open and ducts can be planned into the structure. Retrofitting an occupied house can involve lifting floors, creating ceiling voids, boxing in services or finding alternative routes around structural features. That labour and making-good work is often where the difference lies.
A meaningful quotation should explain what has been allowed for, rather than presenting one headline number. In most cases, the price includes:
- a correctly sized MVHR unit with heat exchanger and controls;
- insulated ductwork, grilles, valves, silencers and external terminals;
- system design, installation, electrical connection and condensate drainage; and
- airflow testing, balancing and commissioning once the system is complete.
Some quotations also include builders’ works, plastering, decorating or bespoke joinery. Others do not. Clarifying these details before work begins avoids the frustration of finding that a low initial quote has left essential elements out.
Why retrofit MVHR costs more than new-build installation
MVHR works best when it is considered early. In a new build or deep renovation, the installer can position the unit in a utility room, loft or plant area, set out duct runs before ceilings are closed, and ensure each room receives the required airflow.
In an existing house, the challenge is to create those routes with as little disruption as possible. A bungalow may offer good loft access but need carefully insulated ducts in a cold roof space. A two-storey house may require ducts through cupboards, wardrobes or ceiling voids. Period properties often need a particularly sensitive approach, balancing ventilation performance with original features and the building’s construction.
This does not mean MVHR is unsuitable for retrofit. It means the design must respond to the house rather than forcing a standard layout into it. In some properties, decentralised heat-recovery units serving individual rooms can be a more practical option than a full centralised system. They may reduce disruption, although they do not provide the same whole-house control or ducted distribution.
The design decisions behind the price
A ventilation system should be sized from the property, room use and likely occupancy – not selected solely because it is the least expensive unit. An undersized system may struggle to clear moisture and pollutants. An oversized or poorly designed one can be noisy, use more electricity than necessary and become something occupants turn off.
The duct layout matters just as much. Short, well-routed duct runs with appropriate diameters help the fans move air quietly and efficiently. Silencers can be valuable near bedrooms, and accessible valve positions make future balancing and cleaning more straightforward. A good design also separates stale-air extract areas, such as kitchens, bathrooms and utility rooms, from living rooms and bedrooms where fresh air is supplied.
Commissioning is not an optional finishing touch. The system must be tested and balanced so that each valve delivers the intended airflow and the property meets applicable ventilation requirements. Ask whether the quoted price includes the final airflow report and a clear handover showing how to use the controls.
What can increase an MVHR installation cost?
Several practical factors can move a project above the usual range. Larger homes need more ductwork and may require a higher-capacity unit. Multiple kitchens, bathrooms or en suites add extract points. Homes with no accessible loft, limited ceiling voids or solid floors usually demand more investigation and labour.
Acoustic requirements can also add cost. This is money well spent where a unit sits close to bedrooms or where ducts pass near quiet living spaces. Similarly, long external duct runs and complicated structural penetrations can require additional insulation, weathering and fire-stopping measures.
Do not overlook the condition of the building itself. MVHR is most effective in a reasonably airtight, well-insulated home. It can still improve indoor air quality in an older property, but uncontrolled draughts reduce heat-recovery benefits. Before committing to a system, it is sensible to consider insulation, air leakage, existing extractor fans and the condition of the heating system as part of one plan.
Running costs, maintenance and long-term value
MVHR uses electricity to run its fans continuously, but modern units are designed to operate at low power. Actual running costs depend on fan settings, system size, electricity tariff, filter condition and how the house is used. The point of the system is to recover heat from extracted air that would otherwise leave the property, reducing the ventilation heat loss associated with opening windows or relying on uncontrolled gaps.
It is not a replacement for heating. Instead, it supports a heat pump, underfloor heating or other efficient heating system by helping the home retain more of its warmth while maintaining a reliable supply of fresh air. For households moving away from oil or LPG, this can form part of a more predictable, lower-carbon energy strategy without fuel deliveries or combustion appliances within the home.
Filters need checking regularly and replacing according to the manufacturer’s guidance and local conditions. A home near busy roads, fields or construction activity may need more frequent attention. Periodic servicing should include inspection of the unit, condensate drain, fans, filters and system performance. Budgeting for maintenance protects air quality, efficiency and the life of the equipment.
Grants and wider renovation budgets
The Boiler Upgrade Scheme is intended for eligible heat-pump and biomass boiler installations, rather than MVHR alone. However, ventilation may be an important supporting measure when a property is being upgraded with an air source or ground source heat pump. It helps to assess the wider project before deciding where the budget should go.
Available finance, VAT treatment and grant rules can change, and eligibility depends on the property and proposed works. A whole-house assessment can identify whether MVHR should be installed now, designed in for a later phase, or replaced with simpler targeted ventilation improvements. This is particularly useful where a renovation is being completed in stages.
How to compare MVHR quotations properly
When comparing proposals, ask each installer to state the assumed airflow rates, unit model, duct type, acoustic measures, electrical work, making-good allowance and commissioning process. Also establish who will coordinate with the builder, electrician and heating installer. These details often reveal why two prices that initially appear similar will deliver very different results.
Experience with both ventilation and low-carbon heating is valuable because systems need to work together. Baddow Eco Solutions takes a whole-house view, considering the building fabric, household requirements, budget and anticipated payback before recommending individual measures or a combined system.
The most useful next step is not to chase the cheapest figure. Arrange a property assessment and ask for a design that shows where every major component will go. A properly planned MVHR installation can provide cleaner air, quieter comfort and lower heat loss for years, provided it is designed around the home you actually have.