What is positive input ventilation system?

Positive Input Ventilation (PIV) is an energy efficient method of pushing out and replacing stale unhealthy air with drier fresh air by gently introducing filtered air into the home and increasing the circulation of fresh air around the property and improving the indoor air quality (IAQ).

Is Positive Input ventilation any good?

Positive input ventilation (PIV) is an effective way to control indoor air quality. This system works by introducing a stream of fresh, filtered air into your property which then displaces stale and humid air that causes condensation and other damp related issues.

Does positive input ventilation make your house cold?

Depending on the design of the house and insulation measures, however, lofts can be cold in the winter and this colder air can be distributed by a positive input ventilation system, having a slight cooling effect on the rest of the house.

Who installs PIV?

PIV Unit Installers One company to consider is Envirovent. They have years of experience installing PIV units, so you can feel confident the job will be done right.

How effective are PIV units?

The short answer is yes. PIV units work, and their effect is transformational. We’ve installed PIV units in homes where the owners thought they would have to leave because of relentless damp problems. A few weeks after installing PIV units, and their home was given a new lease of life.

How long does a PIV unit take to work?

The machine has an immediate effect but allow 14 days to balance the humidity and longer to dry the house out completely. In situations where the render is soaking wet allow 6 months to a year for a completely dry wall.

How long does positive input ventilation take to work?

Did you know that 95% of our customers experience an improvement in condensation within one week after having a unit fitted?

How much electricity does a PIV unit use?

On average a PIV unit will consume 5 watts of power which will cost just 1p a day to run. As a result, PIV systems have long been considered one of the most affordable ways to provide whole home ventilation.

Do I need trickle vents with a PIV system?

PIV will work without the need for any trickle ventilators down to an air permeability of 3m3h/m2 ensuring an additional saving for the house build.

Are PIV units expensive to run?

Do trickle vents let heat out?

A trickle vent is a device usually fitted at the top of a window that allows fresh air to circulate naturally through a room, and allows polluted air out. They are controllable, to give the option of having them open or closed. When used correctly, trickle vents do not contribute excessively to heat loss.

Do you need trickle vents with PIV?

How does Positive Input Ventilation ( PIV ) work?

Positive Input Ventilation is a process which dilutes, displaces and replaces unhealthy air in our homes with clean, fresh and filtered air. Comfort heaters can also be added to preheat the air if required. The ventilation air is delivered into a landing our hallway. It then gently ventilates all other rooms directly off the landing/hallway.

How does PIV help with indoor air quality?

By removing the moisture and other pollutants from the air, condensation cannot settle and mould cannot grow which removes the problem at source. Positive input ventilation (PIV) brings one of the best solutions to tackle poor indoor air quality (IAQ).

Why are positive air ventilation systems so important?

Importance Of The Positive Input Ventilation System Positive Input Ventilation (PIV) systems generate fresh and healthy working and living conditions by providing fresh, filtered air into a property at a continuous rate. PIV systems help to eliminate surface condensation; stops mold development and reduce industrial dust mite populations.

How does Positive Input Ventilation help with condensation?

Positive Input Ventilation is the only ventilation method that can cure condensation in a property whilst also reducing the pollutants in the air, helping to create a fresh, healthy environment. How Does it Work? The PIV process involves drawing fresh air from outside into a fan located in the loft area.