Mechanical Ventilation with Heat Recovery (MVHR)

While often overlooked, ventilation is critical to both energy efficiency and health. Without it, airtight homes can trap moisture, create condensation, and compromise indoor air quality. That’s not just uncomfortable – it’s avoidable.

Why does Mechanical Ventilation with Heat Recovery (MVHR) Matter?

Most existing homes leak air through gaps, cracks, and poor construction. In those homes, “ventilation” happens accidentally. But once you insulate and make a building airtight, those leaks disappear – and so does the unintended air exchange.

Without a planned strategy, airtight homes risk poor air quality, dampness, and overheating. MVHR solves this by continuously supplying fresh, filtered air while recovering up to 90% of the heat from the outgoing stale air.

Contact us for a free survey & estimation

Key Elements of MVHR

Bespoke System Design

Correct Installation

Quality Equipment

Detailed Commissioning

Ongoing Maintenance

Correct Operation

Recent Projects

  • Penwortham Retrofit

    Whole house retrofit of a detached 4 bedroom house estimated to have been built in the 1920s

    Problems:

    • Poor air quality in kitchen and bedroom
    • High annual heating costs
    • High annual electricity cost due to ownership of 2x electric vehicles
    • Unstable internal temperature throughout house
    • Damp & condensation issues
    • Excessive heat-loss via windows & doors
    • Poor air tightness (17ach/h @ 50pa)

    Solutions:

    • Internal Wall Insulation (Rigid Wood Fibre)
    • Ground Floor Insulation (Rigid Wood Fibre)
    • Upgraded Windows & Doors (triple glazed timber frame PH certified)
    • MVHR (Zehnder®)
    • Solar PV + Battery Storage (8.2kWp + 15kWh)
    • Air Source Heat Pump (8KW, Midea)
    • General Repairs
    • Air tightness upgrades
    • Mains water filtration, ionisation

  • Factory Solar Retrofit

    Whole house retrofit of a detached 4 bedroom house estimated to have been built in the 1920s

    Problems:

    • Poor air quality in kitchen and bedroom
    • High annual heating costs
    • High annual electricity cost due to ownership of 2x electric vehicles
    • Unstable internal temperature throughout house
    • Damp & condensation issues
    • Excessive heat-loss via windows & doors
    • Poor air tightness (17ach/h @ 50pa)

    Solutions:

    • Internal Wall Insulation (Rigid Wood Fibre)
    • Ground Floor Insulation (Rigid Wood Fibre)
    • Upgraded Windows & Doors (triple glazed timber frame PH certified)
    • MVHR (Zehnder®)
    • Solar PV + Battery Storage (8.2kWp + 15kWh)
    • Air Source Heat Pump (8KW, Midea)
    • General Repairs
    • Air tightness upgrades
    • Mains water filtration, ionisation

  • Penwortham Retrofit

    Whole house retrofit of a detached 4 bedroom house estimated to have been built in the 1920s

    Problems:

    • Poor air quality in kitchen and bedroom
    • High annual heating costs
    • High annual electricity cost due to ownership of 2x electric vehicles
    • Unstable internal temperature throughout house
    • Damp & condensation issues
    • Excessive heat-loss via windows & doors
    • Poor air tightness (17ach/h @ 50pa)

    Solutions:

    • Internal Wall Insulation (Rigid Wood Fibre)
    • Ground Floor Insulation (Rigid Wood Fibre)
    • Upgraded Windows & Doors (triple glazed timber frame PH certified)
    • MVHR (Zehnder®)
    • Solar PV + Battery Storage (8.2kWp + 15kWh)
    • Air Source Heat Pump (8KW, Midea)
    • General Repairs
    • Air tightness upgrades
    • Mains water filtration, ionisation

FAQ’s

  • MVHR (Mechanical Ventilation with Heat Recovery) continuously supplies fresh, filtered air while extracting stale, moist air. This improves indoor air quality, reduces allergens, and recovers heat to save energy—creating a healthier, more comfortable home.

  • We conduct a thorough assessment of your property’s size, layout, insulation, and your family’s lifestyle needs. This allows us to design a bespoke system that maximizes air quality, comfort, and energy efficiency.

  • By continuously removing moist, stale air and controlling humidity levels, MVHR prevents the conditions that cause mould and condensation—protecting your home and your family’s health.

  • Yes. Our team includes fully qualified electricians and skilled joiners who ensure your MVHR system is expertly installed with a neat, professional finish.

  • MVHR units typically recover up to 90% of heat from outgoing air, reducing heating bills by maintaining warmth while providing constant fresh air.

  • Yes. We offer ongoing servicing, including filter changes and system checks, to ensure your MVHR operates efficiently and maintains healthy air quality over time.

  • Item descriptionAbsolutely. MVHR filters incoming air to remove pollen, dust, and pollutants, significantly improving air quality and reducing triggers for respiratory conditions.

  • MVHR can be installed in both new and existing homes. We tailor the system design to minimise disruption and adapt to your property’s unique requirements.

Free Consultation.

Get in touch with us to discuss your requirements.