No single air testing method is available to figure out the total quality of your home air. Air testing is often not worthwhile unless you know exactly what to test for. Discomfort or unusual odors are the best judge of indoor air quality in homes. Some pollutants, such as radon and carbon monoxide, are odorless, colorless, and tasteless and can only be evaluated by testing. Carbon monoxide and radon test kits may be available through your local American Lung Association or your local hardware store.
Carbon monoxide detecting alarms are also available for continuous testing.
Other air monitoring devices are available for formaldehyde and specific organic compounds. Use of some sampling devices requires scientific training and analysis by a qualified laboratory. Your local or state department of health can refer you to local sources for sampling device purchase and analysis. After you have exhausted all other avenues without success, contact a reputable contractor or a professional industrial hygiene consultant. Make sure to check references and indoor air quality experience.