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Positive Input Ventilation (PIV) is a ventilation system designed to improve indoor air quality and reduce issues related to condensation in buildings.


Here are the key features and functions of Positive Input Ventilation:

  1. Fresh Air Introduction: PIV systems work by drawing in fresh, filtered air from the outside and introducing it into the building's living spaces. This is typically achieved through a fan or unit installed in a central location, such as a loft or hallway.

  2. Positive Pressure: The system creates positive pressure within the building, pushing stale indoor air out through natural leakage points like doors, windows, and extractor fans. This continuous flow of fresh air helps to dilute indoor pollutants and maintain a healthier living environment.

  3. Condensation Control: PIV systems are particularly effective in reducing condensation issues. By consistently introducing dry, fresh air, they help to control humidity levels and prevent the formation of condensation on surfaces, which can lead to mold growth and other problems.

  4. Energy Efficiency: PIV systems are generally energy-efficient, especially when compared to some other ventilation solutions. They work passively to improve air circulation and quality without relying on mechanical extraction systems.

  5. Quiet Operation: Many PIV systems operate quietly, ensuring minimal disruption to occupants. This makes them suitable for residential settings where quiet and unobtrusive ventilation is desirable.

  6. Low Maintenance: PIV systems often require minimal maintenance. Regular replacement of filters, if applicable, and occasional checks are typically sufficient to ensure continued effective operation.

  7. Health Benefits: Improved indoor air quality resulting from PIV systems can lead to health benefits for occupants, reducing the risk of respiratory issues and allergies associated with poor air quality.

PIV systems are commonly used in homes, especially in situations where traditional passive ventilation may be insufficient. They are particularly beneficial in properties prone to condensation and dampness, providing a proactive solution to maintain a healthy and comfortable indoor environment.


*A free survey will be carried out at your chosen site to guarantee a fixed quote.

Video Credit: PRS Manchester Youtube

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