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Maintaining good air quality

When working in confined or enclosed spaces, such as basements, tunnels, pits and shafts, poor air quality can put the health of your workers at significant risk. Contaminated air can have an adverse effect on both your immediate and long-term health, and in the most severe cases, can be fatal. RVT Group Australia ventilation fans for underground, mining, and tunnel are available for hire.

Managing Ventilation on Site View Health Risks

Ventex Ventilation Solutions

Every project poses its own unique challenges, so we supply both axial and centrifugal fans to cater for your specific site needs. Our fans come in a variety of sizes and ducting is also available. Our consultants can create bespoke systems which will improve and maintain the air quality on your site.

RVT offer a wide range of ventilation solutions which are available to hire.

View Ventex Equipment

Why Ventex is the original & preferred solution

Variety of Solutions

RVT offer both Axial and Centrifugal fans; both of which have different benefits depending on the situation


Ventex fans can move up to 120,000 m3 of fresh hour per hour depending on the model selected, ideal for top down construction projects

Long Distance

The Ventex range is specifically designed to maintain high pressure over long duct runs, ideal for tunnels and sewers

Quick and Easy to install

Many of the units can easily be pushed into position and plugged into a 110v supply


Multiple units can be used together to cover an even larger area

Robust and Reliable

Ventex fans are durable and reliable, ensuring you don't have any downtime on site

Reduce Dust Migration

When teamed with our Dustex range, the fans can be used to create negative pressure in order to stop dust migration

Multiple Applications

Ideal for tunnel and basement ventilation

Effective Ventilation on Site

Every day, a huge range of construction activities are carried out that generate airborne hazards. If left uncontrolled, dangerous dust and fumes can be inhaled by workers on site, causing short term discomfort and laying the foundations for serious health conditions in later life. An effective ventilation system must be applied to eliminate dust and have circulated air in the workplace.

The Health Risks

The effect of poor air quality varies substantially depending on the exposure time, type of contaminant and concentration of contaminant. Therefore, without an effective ventilation system in place on site, workers could experience anything from dizziness, fatigue and nausea to lung disease, heart disease and cancer. In the most severe instances, poor air quality can even result in death.

Managing Ventilation on Site


Every project is different and poses its own interesting challenges. Ideally you will be looking to dilute the hazard by forcing clean air into the work space or using positive pressure ventilation to purge the hazard, however there are many scenarios in which you might also consider negative pressure extraction.


If you do not have an effective ventilation solution it can have a significant impact on workers' health. The effect of poor air quality varies substantially depending on the exposure time, type of contaminant and concentration of contaminant. Workers could therefore experience anything from dizziness, fatigue and breathing problems, to lung disease and heart disease. In the most severe instances, poor air quality can result in death.


Calculating ventilation requirements can be tricky and there are a number of things to consider;

  • Identify the hazards; dust, fumes, heat or gases?
  • Will you be using any machinery or equipment?
  • How many people will be working in the space?
  • How long will they be in there?
  • What size is the work area?
  • Does access pose a problem?
  • How far away is the fresh air source?
  • Do we need to apply positive or negative pressure?
  • How many air changes are needed?
  • What airflow and air pressure is required?

We recommend speaking to a fully trained RVT consultant to help you install a fully effective, reliable and robust Ventex ventilation solution on site.

Trusted By

“RVT are always proactive about their products and how they can support the business. They contact the site teams which gets the guys thinking about planning their works. RVT contact me on a regular basis to offer advice and assistance. We recently used their products where an air flow system was adopted to reduce the heat within the boiler room. RVT attended site and carried out an assessment and came up with the idea of external airflow. Great company to have on board for support and advice.”

Daniel Gallacher SHE Advisor - Kier Construction Ltd

Ventilation FAQ's

Learn More About Ventilation

What is the difference between an axial and a centrifugal fan?

An Axial fan has its motor located in the middle of the fan casing, and the airflow passes around it. A centrifugal fan has its motor located to the side of the fan casing, with a ‘snail’ shaped impeller. Typically a centrifugal fan will provide less airflow but at higher pressure than an axial fan with the same size motor.

Is an axial fan better than a centrifugal fan?

Axial fans are better for moving high volumes of air over short distances, whereas Centrifugal fans are better at maintaining high pressure over long duct runs. Despite a lower flow rate, centrifugal fans create a steadier flow, resulting in a significantly higher static efficiency. Centrifugal fans are also typically quieter than axial fans, and even with attenuators fitted are more compact. The best fan to use therefore depends on the requirements of the project.

What fans are best suited for tunnel ventilation?

For railway tunnels, centrifugal fans are often the preferred option as they can be situated outside the tunnel, ensuring that they do not get in the way or block access for vehicles and machinery. Centrifugal fans also maintain high pressure over long duct runs, so they can deliver clean air deep into long tunnels; however, we have also supplied large, high power axial fans, for several tunnel projects.

What fans are best suited for basement ventilation projects?

Typically, Centrifugal fans are the best fans to use for basement ventilation, because they are quiet, compact and perform well even when using long duct runs or duct runs with multiple bends (as is often required to be the case), however each project is unique and requires a specialist assessment.

How many air changes do we need?

In section 3 of the government guidance titled 'Transmission characteristics and principles of infection prevention and control', Public Health England explain that;

"A single air change is estimated to remove 63% of airborne contaminants, after 5 air changes less than 1% of airborne contamination is thought to remain".

The number of air changes required will depend on the environment you are working in and the activities you are conducting; however in more sensitive environments, Public Health England recommend 6 - 12 air changes.

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