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Glossary

Mechanical Ventilation with Heat Recovery (MVHR)

Mechanical Ventilation with Heat Recovery (MVHR) - Efficient Indoor Air Quality Management

MVHR systems are a key component of energy-efficient buildings. Learn how Mechanical Ventilation with Heat Recovery works, its benefits, and how it enhances indoor air quality while minimising energy wastage in residential and commercial structures.

Mechanical Ventilation with Heat Recovery (MVHR) is a vital technology for achieving energy-efficient buildings while ensuring excellent indoor air quality. Understanding how MVHR systems work, their benefits, and their impact on energy savings and indoor comfort is essential for homeowners, architects, and those seeking environmentally responsible ventilation solutions.

Key aspects and details about Mechanical Ventilation with Heat Recovery (MVHR) include:

1. Definition and Importance:

  • Energy-Efficient Ventilation: MVHR systems provide controlled ventilation while recovering and reusing heat from outgoing air.
  • Indoor Air Quality: MVHR ensures fresh, filtered air, reducing indoor pollutants and allergens.
  • Comfort: Consistent ventilation and temperature control enhance comfort.

2. How MVHR Works:

  • Air Exchange: MVHR continuously exchanges indoor and outdoor air to maintain air quality.
  • Heat Recovery: Outgoing warm air transfers its heat to incoming cold air through a heat exchanger.
  • Efficiency: MVHR systems can recover and reuse up to 95% of heat energy from exhaust air.

3. Benefits of MVHR:

  • Energy Savings: MVHR reduces heating and cooling energy consumption by pre-conditioning incoming air.
  • Improved Air Quality: Continuous ventilation minimises indoor pollutants and stale air.
  • Comfort Enhancement: Consistent indoor temperatures and air quality enhance comfort.
  • Moisture Control: MVHR systems can help control humidity levels.
  • Noise Reduction: Reduced reliance on open windows can minimise outdoor noise intrusion.

4. Components of MVHR Systems:

  • Heat Exchanger: The core component that transfers heat between incoming and outgoing air streams.
  • Fans: Circulate air through the system.
  • Filters: Ensure that incoming air is clean and free from contaminants.
  • Ductwork: Distributes air throughout the building.
  • Controls: Advanced controls allow for precise management of air exchange and temperature.

5. Applications:

  • Residential: MVHR is commonly used in modern homes for energy-efficient ventilation.
  • Commercial: Commercial buildings benefit from MVHR for both indoor air quality and energy savings.
  • Renovations: MVHR can be retrofitted into existing buildings to improve ventilation.

6. Energy Recovery Ventilation (ERV):

  • Humidity Control: ERV systems, a variation of MVHR, also transfer moisture between air streams.

7. Building Codes and Standards:

  • Energy Codes: MVHR systems can contribute to compliance with energy efficiency standards.

MVHR systems are integral to creating energy-efficient, healthy, and comfortable indoor environments. By implementing MVHR technology, individuals and builders can reduce energy consumption, lower heating and cooling costs, and promote sustainable and comfortable living and working spaces.

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