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Types of Ventilation Systems

Types of Ventilation System

An effective ventilation system is an essential part of any home or business premises. Ventilation refers to any system that allows air to flow and move between the inside and outside of a property, providing fresh air for the occupants. 

In the past, buildings relied on natural or uncontrolled ventilation. It could involve opening windows and doors, fixed air vents, and natural gaps in the structure. It is not always effective in a modern property, though, especially as energy-efficient homes and offices are built to increasingly airtight designs. Natural ventilation can either over ventilate or under ventilate a building and is uncontrollable. 
Mechanical systems are often required to achieve the right rates of air exchange in a building. It can help safeguard the health of the occupants and prevent issues such as damp. 

Adequate ventilation is essential in maintaining a healthy environment, as it: 

The core ventilation methods are: 

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Extractor Fans

Extractor fans can be ideal for extracting stale, polluted, or damp air out of individual wet rooms, such as kitchens, bathrooms, wet rooms and utility rooms.

Without extractor fans, bathrooms can be prone to condensation, which can lead to damp and the growth of black mould. The moist, damp air in the wet rooms can also migrate around the rest of the property, causing issues in other rooms.

A bathroom is a damp room by definition, so providing proper ventilation is imperative, both for the occupant's health and for the bathroom itself. Renewing the ambient air limits the emergence of any condensation and the appearance of mould all the while reducing the humidity level. 

Replace your extractor fan and improve the ventilation of a bathroom or kitchen and reduce moisture and unwanted odours by installing a high-performance kitchen or bathroom extractor. Our range of extractor fans for bathrooms and kitchens consists of inline extractor fans, silent extractor fans, wall mounted extractor fans and axial fans.

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Positive Input Ventilation (PIV)

Positive Input Ventilation or PIV Systems work by encouraging the movement of air from outside to inside from a unit that is usually installed in a loft. These units reduce or eliminate surface condensation altogether by replacing humid stagnant air with fresh filtered air.

The central unit draws air from either the loft or outside, filters it, and delivers it into the property, creating a positive pressure which, in turn, forces the stale air out. 

PIV is required when: 

✔ You don't want to do a full renovation. 

✔ You require a whole house ventilation solution. 

✔ You don't want to remove any walls or go back to brickwork. 

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. 

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.  

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Continuous Mechanical Extract Ventilation (MEV)

MEV or Continuous Mechanical Extract Ventilation are systems that provide continuous ventilation using either a single central system with multi point extracts or several de-centralised systems which are located in wet rooms such as a kitchen, bathroom utility, en-suite and WC. This creates a negative pressure, which theoretically draws fresh air evenly into the property through the envelope of the building. 

MEV systems provide all year round good indoor air quality, protecting your home from condensation, damp and mould.

Both the centralised and de-centralised MEV systems provide a good level of flexibility that provide some great advantages, such as:

  • The ability to be used either for a retrofit with individual fans, as well as for a new build or extension using a single centralised system.
  • Both options are easy to install, and provide whole house ventilation as long as all wet rooms are served by the systems.
  • You want a fit and forget solution.


All our Continuous Mechanical Extract Ventilation (MEV) systems are reliable, long-lasting and operate at low noise levels.  Our MEV systems also come with a two year guarantee, giving you peace of mind when purchasing. 

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Heat Recovery Ventilation (MVHR)

Mechanical Ventilation with Heat Recovery (MVHR) is a whole house ventilation system that both supplies and extracts air throughout a property.

Heat recovery systems typically recover about 73–95% of the heat in exhaust air and have significantly improved the energy efficiency of buildings.

MVHR is required when:

✔ You are doing a full renovation or building a new house rather than a retrofit.

✔ You require a whole house ventilation solution.

✔ You want to make your home energy efficient.

These systems consist of two independent ducted airflows, each with its own fan: 

  • The extract fan extracts the stale, humid air from the wet rooms (bathrooms, kitchen, utility, etc). This stale air is then passed over a heat exchanger – where heat is ‘recovered’ – before it is discharged outside the house.

  • The second fan draws fresh air from outside. The air is then filtered to get rid of pollution and airborne allergens, and then passes it over the heat exchanger in order to warm it — and so supplies pre-warmed fresh air to all the living areas and bedrooms.

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Other ranges from EnviroVent:

The Lifetime® range

Energy-efficient and sustainable, the Lifetime Range® products have been designed to cater for all domestic ventilation applications, such as kitchens, bathrooms and whole house solutions. These include extract fans, mechanical extract ventilation, positive input ventilation, providing you with a complete environmentally-friendly solution. 

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The Silent Range

Designed for wall, ceiling and in-line applications, the models are suitable for WC, bathroom, utility room and kitchen installations.

The extract fans from the SILENT range are the result of a long and meticulous development process by the Research, Development & Innovation Department at EnviroVent, who have patented a new concept; bringing about a revolutionary change in extract fan design to extract the maximum airflow with the minimum noise possible.

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ATMOS range

ATMOS® from EnviroVent brings clean air back into your home. As the fresh air gently circulates around your home, the stagnant, polluted air is diluted, creating a healthier home and a healthier you.

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Every property is different and each property has their own ventilation requirements, what works for one won’t necessarily work for the next. It’s very important to ensure that you properly look into the different options, installing a whole house solution may seem daunting but it will also mean any damp or mould issues will no longer be a problem.   

EnviroVent offer a free home survey as standard to ensure the correct product is installed. During a free home survey your local expert will assess any condensation, damp and mould problems that you may be facing in your property and take readings of the relative humidity levels throughout the property. All our ventilation specialists are highly trained in carrying out home surveys to identify any underlying problems and make recommendations to ensure the correct solution is provided, all complying with current Building Regulations.

Use the product selector to find the right ventilation product for your requirements.

Need help with condensation, mould or damp problems?

One of our local experts will contact you to learn more about your problems, offer free expert advice and make recommendations for a permanent solution.

During the free survey we will

  • check Assess any condensation, damp or mould problems in your property
  • check Take readings of the relative humidity levels
  • check Identify any underlying problems and make recommendations for a permanent solution

Need help with condensation, mould or damp problems?