The COPD screener is a valuable device that serves as a home monitor and also a screener prior to spirometry. The COPD screens out those who have normal FEV1's, therefore those who do not have COPD, without the risk of false COPD negatives. This capability allows spirometry resources to be focused on the highest risk patients. This device measures FEV1, FEV6, ratio, lung age, for GOLD COPD assessment. Accepts input of age, gender, height, and race and calculates predicted value and percentage predicted.