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What is the usual quantity of free air taken per person in air conditioning system?

What is the usual quantity of free air taken per person in air conditioning system? Correct Answer 1.2 m<span style="position: relative; font-size: 10.5px; line-height: 0; vertical-align: baseline; top: -0.5em;">3</span>/min

Explanation:

Quality and Quantity of Air

  • The air in an occupied space should, at all times, be free room toxic, unhealthful or disagreeable fumes such as carbon dioxide.
  • It should also be free from dust and odour.
  • In order to obtain these conditions, enough clean outside in must allows be supplied to an occupied space to counteract or adequately dilute the sources of contamination.
  • The concentration of odour in a room depends upon many factors such as directory and hygienic habits of occupant, type and amount of outdoor air supplied, room volume per occupant and types of odour sources.
  • In general, when there is no smoking in a room, 1 m3/min per person of outside air will take care of all the conditions.
  • But when smoking takes place in a room, 1.5 m3/min per person of outside air is necessary.
  • In most airconditioning systems, a large amount of air is reticulated over and above the required amount of outside air to satisfy the minimum ventilation conditions in regard to odour and purity.
  • For general application, a minimum of 0.3 m3/min of outside air per person, mixed with 0.6 m3/min of recalculated air is good.

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