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In-house Ventilation (PIV)

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An in-house ventilation system, also known as "positive input" ventilation (PIV) is when the naturally warmed air (from a roof cavity) is drawn into a fan that filters and freshens the air and delivers it back into the main living spaces of a home.

 

Through this process the damp air is naturally forced out and replaced by the refreshed, healthy air from the fan. The invention of these systems originated in the UK during the 1970’s and the products we have selected to use are also sourced from there; they have been proven and scientifically tested over time to significantly reduce air pollutants and contaminants and will improve the air quality in your home.

 

PIV or in-house ventilation is very important in making your house a healthier place to live. The in-house air pollutants and moisture produced can contribute to an unhealthy environment. Evidence of this are: high dust levels, condensation on windows and walls, mould and mildew on ceilings, and a generally damp, cold feeling inside the house.

 

Everyday living activities causes these problems: such as cooking, drying clothes in the drier, and showering all lead to moisture being produced into the household atmosphere; using aerosol sprays produces pollutants, warming the house via freestanding gas heaters, the main by-product of gas being water vapour. We also give off an estimated 2 Litres of moisture (per person) from our own human bodies each day.

 

If you are producing or introducing moisture into your home, then mould can generate.

If you do live in a "damp" house, i.e. you have over 60% humidity levels/moisture content in the air, there is also the problem of dust particles being trapped and settling on moist surfaces, which then the mould spores will land on and can generate more mould.

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Solution:

PIV gently supplies tempered, filtered air back into the home using heat from within the roof space.

Customers have commented on improvements in their previous health troubles with conditions such as asthma and respiratory infections, due to installing a system to improve the air quality of their home.

 

PIV systems have also been known to additionally benefit the customer by way of reduced energy usage (a net energy gain): using less energy to heat the dry air within your home, rather than heating the moisture particles in a damp house (which uses more energy.)

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