North York Pulmonary Function Center opened in 2008 at its current location and provides comprehensive pulmonary function testing services. North York Pulmonary Function Center specializes in diagnostics of a broad spectrum of respiratory diseases, such as asthma, COPD, pulmonary fibrosis, other causes of lung restriction, and pulmonary hypertension.  We are capable of performing oximetry at rest and with exercise as part of dyspnea assessment.  Realizing that many patients with asthma may have normal pulmonary function tests, we also expanded our services to provide methacholine challenge testing for assessment of airway hyper-