Positive Input Ventilation

What is Positive Input Ventilation?

Positive Input Ventilation (PIV) units are a popular and proven method of dealing with condensation and mould issues within houses and other properties. The technology has existed for a few decades and is now in a position where we not only recommend PIV units for many properties that we survey but also have them installed in our own houses.

What is PIV?

Positive Input Ventilation Systems essentially constantly provide fresh, filtered air to all parts of your property. This is turn removes stale, stagnant, and humid air from your property, which would otherwise contribute to condensation and mould issues.

Nuaire Drimaster ECO HC
Nuaire Drimaster ECO HC

PIV units are normally fitted into the loft space of a house, however smaller units for flats and apartments without loft access are now available. The unit draws in fresh air either through the eaves of the loft space or through a bore hole to the outside. This air is then filtered, and in some cases heated, then dispersed throughout the home from the landing or hallway area. This air essentially flushes out older, humid air through the small gaps that naturally occur in a property such as around doors, windows etc.

Nuaire Flatmaster
Nuaire Flatmaster

In recent years, there has been a big push to improve the thermal and energy efficiency of the housing stock in the UK. This has led to a big increase in the levels of retrofit insulation and double-glazing units being added to our homes. As we hermetically seal our properties, it reduces the amount of natural ventilation and air flow that occurs. This then has led to an increase in humidity, condensation and mould issues within our houses. We have seen a rise in these issues in the homes that we survey every day. Unfortunately, the solution to this is not as simple as opening a few windows as this can then lower the internal temperature of walls, in turn making condensation worse. Also relying on windows to be opened, especially in rented properties, can be a risk as many people would prefer them closed. Ground floor properties can also be susceptible to security risks if windows are left open. The answer instead is to install a PIV system into the property to automatically provide fresh, filtered air. Positive input ventilation systems are fit and forget technology that require very little maintenance.

How Can We Help With PIV Solutions?

Insitu SCP are one of the most established names in building preservation in the South East of England, with over 40 years’ experience in the industry. We have a team of qualified and friendly damp and timber surveyors who have years of experience in the industry. We can conduct a thorough survey on your property, to spot for any signs of damp or timber issues. We will then produce a thorough written report highlighting any issues that we have spotted. We can also undertake any remedial work to solve the issues, as we have a brilliant construction team on hand. Once any work is complete, we cover it with our 10-year guarantee so that you can rest assured that your property is safe from the dangers of condensation for the future.

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