4th March 2021: Updated Ventilation Guidance from the UK Government > Learn more

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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.

Equipment Range

Effective Ventilation

Let an RVT consultant handle the complex calculations for you!


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.

RVT Group ventilation examples

Why Ventex® is the original & preferred solution

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Variety of Solutions

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

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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

Scaffolding Compliant Duct Runs

Long Distance

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

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Quick and Easy to install

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

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

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Robust and Reliable

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

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Reduce Dust Migration

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

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Multiple Applications

Ideal for tunnel and basement ventilation

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“This is the first time I have done business with the RVT Group and based on the experience it will not be the last if I need to hire portable dust extraction equipment again.”

Jim Smith Health & Safety Manger - Amey Services Ltd

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Free Ventilation Whitepaper

On 4th March, the Government released new ventilation guidance. If you are looking for an easy-to-digest version of the guidance, download our ventilation whitepaper.

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