At room temperature, Carbon Dioxide is a colorless, odorless, and non-flammable gas. Exposure to CO2 can result in a variety of health effects, including headaches, dizziness, restlessness, difficulty breathing, increased heart rate, and elevated blood pressure, among others. Human respiration (or breathing) as well as cooking/heating activities (in particular, open flame) are the main indoor sources of CO2. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Avoiding thermal discomfort indoors is not only about occupants’ satisfaction and comfort, but also protecting health. Cold/hot temperatures can cause respiratory and cardiovascular stress, hypothermia, dampness and mould, or heat stroke. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Both very low or high relative humidities may cause some physical discomfort, as the air relative humidity directly affects temperature perception. Extremely low (below 20%) relative humidities can also cause eye irritation or drying of mucous membranes that promotes susceptibility to respiratory viral infections. Besides, relative humidity can indirectly affect the incidence of allergies and infectious respiratory diseases through facilitating the airborne transmission mode. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Fine Dust or particulate matters (PM2.5) are inhalable pollutant particles with a diameter of less than 10 micrometers, with cooking and cigarette smoking as the major indoor sources as well as occupant activities resuspending indoor dust. Particles that are larger than 2.5 micrometers can be deposited in airways, resulting in health issues. Exposure can result in eye and throat irritation, coughing or difficulty breathing, and aggravated asthma. More frequent and excessive exposure can result in more serious health effects. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Volatile Organic Compounds are a group of thousands of organic chemicals we find in the air. Among the most common VOCs are butane, ethanol, acetone, benzene, or formaldehyde. Indoor VOCs are mainly generated from occupant activities including cooking, smoking and the use of cleaning and personal care products, besides originating from furniture and building materials. Exposure to VOCs can cause problems, from headaches, respiratory tract irritation, and nausea, to more serious health issues such as breathing difficulty, dermatological problems, or reproductive disorders. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Carbon Monoxide in indoor air is produced mainly by combustion processes, such as cooking and heating, as well as through infiltration from outdoor air. Carbon Monoxide is a colorless and odorless gas, and when inhaled at high concentrations can cause headaches, nausea, dizziness, and vomiting. Repeated long-term exposure can lead to heart disease. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Neither positive nor negative indoor air pressure is good, given either puts pressure on the building envelope promoting air leakage and thus deteriorating indoor air quality and thermal comfort. Besides, negative (low) air pressure can cause and/or exacerbate headaches, joint pain, or blood pressure drops. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Neither positive nor negative indoor air pressure is good, given either puts pressure on the building envelope promoting air leakage and thus deteriorating indoor air quality and thermal comfort. Besides, negative (low) air pressure can cause and/or exacerbate headaches, joint pain, or blood pressure drops. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Road traffic is the principal outdoor source of Nitrogen Dioxide. The most important indoor sources include tobacco smoke and cooking/heating appliances such as stoves, ovens, space and water heaters and fireplaces. Breathing in high levels of Nitrogen Dioxide increases the risk of respiratory problems. Coughing and difficulty breathing are common, and more serious health issues such as respiratory infections can occur with longer exposure. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

The amount of light we’re exposed to during the day influences our productivity and health. Depending on the office type and activities, the recommended range varies from 300-800 lux. The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.

Although a little background noise can help drown out distractions, too much noise can cause stress and impede productivity. A "hazardous sound" can be seen as any sound that exceeds 85dB (a weighted average of noise exposure over a standard 8-hour work period). The indicators are based on the average of the last hour as well as the 24h-trend and the daily averages over time.