Guide to ventilation air changes per hour

Andrews ventilation is able to offer long or short term hires for all you ventilation and extraction requirements. Our range is continually updated and we can offer units ranging from 1,700m³/hr to 16,500m³/hr.

Our table below sets some practical guidelines to the amount of air changes that may be required in some typical applications. Please be aware that factors as shown below have a bearing on the air change requirements.

• The size of the room or building
• The purpose of the ventilation
• Heat gains from other sources
• The buildings requirements for temperature, humidity and levels of filtration
• Number of occupants
• Type of activity they are engaged in

If you have selection difficulties we have specialists available who would be able to offer you advice and a practical hire solution