Positive Input Ventilation (PIV)
Positive Input Ventilation (PIV) also sometimes known as positive pressure ventilation works as a whole house ventilation system and creates fresh and healthy living environments by supplying fresh, filtered air into a property at a continuous rate throughout. Ventilation is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used for purposes of thermal comfort or dehumidification. Positive Input Ventilation or PIV Systems work by encouraging the movement of air from inside to outside from a unit that is usually installed in a loft. These units reduce or eliminate surface condensation by replacing humid stagnant air with fresh filtered air.
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How does Positive Input Ventilation work?
Positive Input Ventilation (PIV) systems create fresh and healthy living environments by supplying fresh, filtered air into a property at a continuous rate throughout a property and is our most popular method of whole house ventilation.
They ensure that a continuous supply of air is supplied into the home to eliminate or significantly reduce condensation.
Is a PIV System Worth It?
Damp and Mould issues in your property
If you are suffering from damp and mould issues in your property, there are various ventilation options you can look at.
But most of these can be rather invasive to install, with long ducting runs that will need to be placed within the building structure to reach multiple rooms within the building.
PIV systems are a simple and effective solution to household damp and mould problems and are the least invasive to install, requiring only a single ceiling grille and electrical wiring in your loft space.
This makes PIV systems the best option to install into an existing building with minimal structural interference.
Will Positive Input Ventilation stop condensation?
Yes – this is predominantly what PIV systems are designed for.
By displacing humidity in the home and replacing the atmosphere with warm, dry air, condensation will be re-evaporated and forced out of the building.
Over time, the continual process of the PIV will remove humidity before it has a chance to condense and settle in the property.
Does PIV make your house cold?
The simple answer is no but it depends on the model of PIV unit you install.
Many PIV systems include a heating element to warm the air before introducing it into the property.
These heating elements have a summer bypass function so you won’t have hot air introduced when the ambient temperature is high.
But not all PIV units have this heating option.
As the air is being supplied from your loft space, the temperature of the air being introduced from a non-heated PIV unit will depend on the temperature of the loft air.
The majority of the PIV systems purchased from us are units incorporating the heating element and we would recommend choosing this option.
With a PIV system should windows be open or closed?
Ideally, you will want to keep windows closed.
Open windows allow cold, moisture-filled air to enter buildings which will have a detrimental effect on the desired effect of eliminating damp issues.
They will also create a hot/cold air barrier that will condense the exiting moisture faster at the open windows causing a higher amount of condensation on the glass.
How does Positive Input Ventilation work?
Positive Input Ventilation (PIV) systems create fresh and healthy living environments by supplying fresh, filtered air into a property at a continuous rate throughout a property and is our most popular method of whole house ventilation.
Positive Input Ventilation (PIV) is a whole house air ventilation system that works by drawing in fresh, filtered air into a property from outside. These can be either installed in a loft space or on a wall in a flat or apartment. They ensure that a continuous supply of air is supplied into the home to eliminate or significantly reduce condensation.
Ventilation is the intentional introduction of outdoor air into a space and is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used for purposes of thermal comfort or dehumidification.
Is a PIV system Worth it?
Damp and Mould issues in your property
If you are suffering from damp and mould issues in your property, there are various ventilation options you can look at.
But most of these can be rather invasive to install, with long ducting runs that will need to be placed within the building structure to reach multiple rooms within the building.
PIV systems are a simple and effective solution to household damp and mould problems and are the least invasive to install, requiring only a single ceiling grille and electrical wiring in your loft space.
This makes PIV systems the best option to install into an existing building with minimal structural interference.
Will Positive Input Ventilation stop condensation?
Yes – this is predominantly what PIV systems are designed for.
By displacing humidity in the home and replacing the atmosphere with warm, dry air, condensation will be re-evaporated and forced out of the building.
Over time, the continual process of the PIV will remove humidity before it has a chance to condense and settle in the property.
Does PIV make your house cold?
The simple answer is no but it depends on the model of PIV unit you install.
Many PIV systems include a heating element to warm the air before introducing it into the property.
These heating elements have a summer bypass function so you won’t have hot air introduced when the ambient temperature is high.
But not all PIV units have this heating option.
As the air is being supplied from your loft space, the temperature of the air being introduced from a non-heated PIV unit will depend on the temperature of the loft air.
The majority of the PIV systems purchased from us are units incorporating the heating element and we would recommend choosing this option.
With a PIV system should windows be open or closed?
Ideally, you will want to keep windows closed.
Open windows allow cold, moisture-filled air to enter buildings which will have a detrimental effect on the desired effect of eliminating damp issues.
They will also create a hot/cold air barrier that will condense the exiting moisture faster at the open windows causing a higher amount of condensation on the glass.
Fully insured & guaranteed
Over 20 years experience
Fully trained & accredited team
Fully insured & guaranteed
Over 20 years experience
Fully trained & accredited team
FAQ
Most frequent questions and answers
A thorough damp report by a certified professional will take around 2 to 3 hours. Every nook and cranny of your home will be inspected for moisture and assessed for damage. Get a damp proofing quote from a certified company to make sure you get the best service.
If you’re wondering if damp testing is something you pay for out of pocket, the answer is yes. After all, it’s not something that’s covered by home insurance. Fortunately, you can find qualified experts who can give you the services you need without breaking the bank. Contact our team for a certified surveyor to learn more.
You need an expert surveyor to check your home to ascertain no stone is left unturned. Missing out on a damp spot will render any job useless because things can escalate rapidly once again. If you want things done right and avoid back jobs that cost money and impinge on your time, get professional help.
A damp report cost in the UK is between £150 and £400. Fortunately, you can get really good service with competitive pricing based on the size of the property for £150 – £300. Don’t delay getting a damp survey if you see signs of dampness in your home to avoid exacerbating the problem.
