Carbon dioxide is an invisible gas that comes from human breath that can cause headaches, restlessness and drowsiness. High levels are correlated to reduced cognitive function and the increased transmission of infectious diseases

Volatile organic compounds (VOCs) are odours and chemicals emitted by many everyday products like cleaning materials, paints, furniture and plastics. They can cause eye, nose and throat infections and even liver and lung damage in serious cases

Maintaining the ideal temperature within indoor spaces is essential for occupant comfort and wellbeing, as excessive heat can cause dehydration and fatigue, and prolonged exposure to the cold can cause numbness and white finger

Too much or too little humidity can affect allergies, asthma and cold/flu symptoms. When humidity is too high mould and damp will occur, and when too low, humidity causes dry skin and increased susceptibility to colds and respiratory illnesses

Controlling air pressure is essential in keeping buildings comfortable, as a slight positive pressure in the summer will help keep the hot outside air from penetrating the building, and a negative pressure during the winter will allow outside air in, to maintain humidity

Ensuring the correct light levels in the workplace is essential to occupant wellbeing, as poor lighting can cause eyestrain, fatigue and headaches, and lighting unoccupied areas impacts your building's energy efficiency