• Garages & Workshops

Garages, Workshops & Showrooms are defined as commercial establishments that provide services and repairs for motor vehicles.

The design requirements for any ventilation system for these applications will vary according to the size and nature of the business, from large car dealer showrooms with dedicated servicing centres, to the smaller independent garages and workshops.

Ventilation must limit the exposure of workers to exhaust gases, in particular, Carbon Monoxide and Nitrous Oxide, which are very dangerous, therefore proper mechanical ventilation design is of paramount importance in the breath.

The exhaust fumes from engines burning gas and diesel fuel are a complex mixture of glasses and fine particulates, as they contain toxic substance that disperse in the breathing area of the garage workshops. In addition, exhaust residue adheres to walls and other surfaces, which eon become bedded in clothing, furniture, where it can be absorbed through the skin.

In view of the dangerous nature of the accessories to the repair and storage of motor vehicles and the risk of pollution from waste gases and products, the priority should be to remove exhaust fumes from vehicles workshop areas. Supply air is not always required in the workshop area as there is some reliance on shutter doors to gain fresh air.

Where a repair bay is not immediately adjacent to an outside garage door opening, continuous general ventilation per internal bay should be provided to dilute exhaust gases generated by the movement of vehicles within the building.

Additional ventilation maybe required;

  • If workers are stationed in the garage for a long time.
  • The general traffic pattern is such that groups of vehicles arrive and depart in clusters.

As a general rule, supply and extract fans would be required in office and showroom areas, either wall or roof mounted.

Particular care needs to be taken where inspection and repair pits are present as vehicle and fuel fumes being heavier than air, will tend to flow into these areas.

Ventilation system designs for smaller garages would tend to centre upon fresh air being supplied through openings in the outside wall, whilst polluted air is extracted through openings close to the floor and the roof.

In larger commercial buildings, garages and showrooms, it is common to use air from the ventilation systems in the surrounding buildings all fresh air supply. Air with room temperature is supplied to the building, while the polluted air extracted through openings close to the floor and the roof.

Where garages accommodate spray booths, the air changes per hour will be significantly higher, and the ventilation design should take into account the health and safety requirements and the compliance with Atex directives.

Elta Fans provide an extensive range of ventilation products for garages, vehicle servicing centres, workshops and car showrooms, so for more information, please look at examples of typical products that could be used, or alternatively, please contact us to discuss your specific application requirements.