Positive Input Ventilation System & How It Works

Positive Input Ventilation System & How It Works

Proper ventilation prevents the growth of dampness, condensation, and mould in your home. It is a daunting task to keep your home fresh throughout the year. A positive input ventilation system (PIVS) in your home helps in keeping your home fresh by supplying filtered air to a property at a constant rate.

The main objective of ventilation is to enhance the air quality by replacing the polluted air from your home. Besides, it also acts like a dehumidifier by providing thermal comfort to your home. The working method of a PIV is that it regulates the movement of inside air from the unit that is installed in the loft.

What does Positive Input Ventilation System mean?

It is the process of supplying a fresh and a healthy environment and forcing the damp air out through inlets or cracks from the house,. The machine that performs the process is called a positive input ventilation system.

What are the benefits of a Positive Input Ventilation System?

All these problems are the common cause of black moulds, condensation, excess damping in the walls. Moreover, it also causes various health issues such as respiratory tract infection, and asthma. Hence, installing PIV fights all these challenges by forcing out the humid air from your house. Positive Input Ventilation benefits are as follows:

Stops the Growth of Moulds and Condensation – When the relative air humidity of your house increases, the overall temperature starts declining. The parts of your house that are prone to condensation issues might lead to the growth of moulds.

However, the PIV unit installed in your house creates a balance that stops the growth of moulds and condensations issues.

Prevents Respiratory Infections/Asthma – The condition of the people who are suffering from asthma or respiratory problems can get worsened if condensation affects your property. Moreover, when condensation and black moulds starts growing, it produces a stinky smell that is harmful to patients suffering from respiratory problems.

Reduces Energy Consumption – The major benefit of installing positive ventilation is that helps to effectively reduce the overall energy consumption in your home via providing effective heat distribution. Every house emits a good amount of heat through the walls and from the roof.

PIV helps to filtrate the damp air from your house and circulates the fresh air into your house. This allows you to save enormous costs on your utility bills.

Helps in Proper Ventilation – Positive input ventilation is different from conventional extraction fans in a variety of factors. Although extraction fans help in forcing out the humid air, PIV operates in minute gaps in your house making it far more effective.

Operates Silently – The PIV system carries a significant advantage while operating inside your house. It does not produce any sound while it is operating. Meaning, it helps your house to force out the impure air even at a normal operating speed. 

How safe is it to use the PIV unit in properties?

A PIV unit can be used in any property irrespective of its location or size. It does not matter whether you live in a bungalow, flat, or five-storey building. The properties that have a loft system will draw a huge advantage from the PIV installation. The PIV unit supplies back the accumulated heat that is gathered from the roof into your house effectively.

Moreover, the PIV unit remains hidden in the loft of your house, and can only be seen through the ceiling either in the landing or through the hallway. The houses that do not contain a loft will also draw a huge advantage by installing the PIV unit. The unit is easily installed in a wall-mounted system by working through the same procedure. It forces out the damp air from the house and supplies back fresh air into your property.

How does Positive Input Ventilation work?

The PIV unit in your house works by circulating the fresh air from your roof directly into your property. This air is then filtered back in the form of fresh air from the PIV unit installed into your house. The air heater in the PIV unit regulates the optimum temperature for your home and is introduced back into your rooms.

As a result of infiltration and exfiltration of air, it creates air pressure into your living space. This air pressure then helps in eliminating the damp and moisture-laden air outside through gaps. Moreover, using extracting fans along with the PIV unit helps in keeping your house ventilated throughout the year.

The positive input ventilation working unit is beneficial to use in both older and new building systems. Additionally, it also helps you to save hefty energy bills by keeping your house warmer during the summers. Moreover, it only costs you one penny on daily basis to run the PIV unit for your property. However, the costs may go up slightly during the cold weather as your house becomes dependent upon the air heater of the PIV unit to keep your house warm.

What are the drawbacks of a PIV unit?

The PIV unit is only effective if the house is airtight. Meaning, if the house has several gaps through which the air passes then it will not affect your house. Moreover, the effectiveness of a PIV unit also depends upon the loft space in your property. Hence, if your property does not contain any loft space then installing a PIV unit is not recommended at all.

Additionally, the PIV unit also needs to be on the same platform as with the building regulations of your region. Another important aspect of the working procedure of a PIV unit is that it also depends upon the temperature of your loft.

To enhance the effectiveness of your PIV system, your property needs to be properly insulated. Proper insulation of the entire property will prevent the hot air from escaping from your house, especially in the winter months.

Is it worth buying a Positive Input Ventilation System?

Many homeowners often face the problem of dealing with damp issues, condensation, and mould growth in their homes. However, installing a PIV unit eliminates any chances of mould growth, condensation, and other issues easily.

The prices of installing a PIV unit are not exorbitant since it is comparatively lower than regular maintenance fees.

What is the difference between Positive Input Ventilation and MVHR?

The working procedure of the positive input ventilation and mechanical ventilation with heat recovery is the same. However, MVHR operates by creating a duct and that is not viable all the time for an existing property. Moreover, a PIV unit consists of a single unit that is installed in a loft that makes it a good option for using it in the property.

Positive input ventilation works best where there is a slight gap making it the best choice for existing homes. Whereas, using MVHR works best where one can easily design or install in homes that have higher air resistance.

Frequently Asked Questions

Question: Do PIV systems make too much noise?

Answer:  The PIV unit is noiseless when it is running at a normal speed. However, the noise might increase while modifying the settings if your home has a higher content of moisture in the air. When the PIV unit forces the excess humid air from the house, you can set the unit at a normal speed.

Question: Does the fresh air supplied to the home remain cold?

AnswerYes, but you can do it by controlling the electronic moisture meter indicating the moisture level. You also need to drill the inside of the walls by creating small holes and then placing deep probing sensors.

Question: Do PIV units turn off automatically?

Answer: Most of the PIV units manufactured contain an in-built heater whose sole objective is to filter the fresh air all the time. When the temperature of the loft or the outside is warmer, the PIV unit automatically is switched off. It switches on when the temperature becomes low.

Question: Are PIV units expensive to buy?

Answer: The price of buying and installing a PIV unit depends on the size of the property and the installer. Although, the running cost of a PIV is low and it helps you  save money regarding hefty energy bills.

Question: Do PIV units require maintenance? Answer: The entire PIV unit runs on autonomous mode. Since it has flexible adjustment mode features, you can increase or decrease the air depending on your needs and  the level of humidity. Besides this, you also need to renew the air filters as per the instructions of the manufacturer.