Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more

Age and Physical Growth - Weight and Height

Age and physical growth boys and girls - age 2 to 18 years

Age and Shift in Hearing Threshold

Shift in hearing threshold - men and women

Air Contaminants Limits

Permissible exposure limits various air contaminants

Ammonia - NH3 - Concentration in Air and Health Symptoms

Ammonia and health symptoms - smell and threat to life

Area per Person

Common area per person in buildings - values that in general can be used to calculate indoor climate loads

Body Weight versus Height

Ideal body weight versus height

Carbon Dioxide Comfort Levels

CO2 acceptance and comfort levels

Carbon Dioxide Concentration in Rooms

The carbon dioxide concentration in rooms can be used to indicate air quality and ventilation system efficiency

Carbon Dioxide Emission from People

Carbon Dioxide emission from persons depends on activity

Carbon Monoxide - Health Effects

Exposure health effects of Carbon Monoxide - CO

Clo - Clothing and Thermal Insulation

Clo is used to measure the thermal insulation of clothes

Clothing, Activity and Human Metabolism

Human metabolism at low and high activity with different levels of clothing

Dangerous Levels of Gases

Tolerable and dangerous levels of industrial gases

Discomfort Index

Based on dry bulb, wet bulb and dew point temperature

Effects of Low-Frequency Noise and Vibration on People

Physiological effects of low-frequency noise and vibration

Energy in Food

Energy in carbohydrates, fats and proteins

Heat Discomfort Zone

Maximum recommended work load and heat discomfort zone

Heat Index

Equivalent heat index temperatures at various temperatures and corresponding relative humidity - in degrees Fahrenheit and Celsius

Human Effort Levels - Energy and Heart Rates

Work effort levels, energy expenditure and associated heart rates

Human need of Air

Fresh air is required for respiration and for transport of heat and vapor emitted from the human body

Illuminance - Recommended Light Levels

Recommended light levels - illuminance - for some common types of working activities


Legionella pneumophila - bacterium that thrives in water supply and air conditioning systems - causing Legionnairs disease

Life Expectancy

Men and Women - age and life expectancy

Met - Metabolic Rate

The Met is often used as a measuring unit of human body heat or power production

People and Heat Gain

Heat Gain from Occupants in Air Conditioned Spaces - in btu/hr

Persons and Metabolic Heat Gain

Metabolic heat gain from occupants in air conditioned spaces at different degrees of activities - in Watts

Physiology - Activity and Metabolic Rate

Heat production from the human body at some common activities

Predicted Mean Vote Index (PMV)

The PMV index predicts the mean response of a larger group of people

Recommended Relative Humidity

Recommended relative humidity level

Relative Humidity and Health

Bacteria, viruses, fungi, mites, asthma and optimum range of relative humidity

Required Rest Time

Relaxation requirements to measures of fatigue

Resultant Temperature

Resultant , or globe temperature

Sound Power, Intensity and Pressure

An introduction to decibel, sound power, sound intensity and sound pressure

Sound Pressure - recommended Maximum Level in Rooms

Maximum recommended sound pressure levels in rooms with activities as kindergartens, auditoriums, libraries, cinemas and more ...

Survival Time in Cold Water

Time of exhaustion and death in cold water

Wet Bulb Globe Temperature (WBGT)

The WBGT can be used to measure the general heat-stress index

Wind Chill Index

The Wind Chill Index or the Effective Temperature of air in movement

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