The Quality Service Contractors and the National Comfort Institute are hosting two-day training courses on May 4 and 5 in Houston and May 24 and 25 in Kansas City, Mo. The workshops are conducted by Jim Davis, renowned HVAC industry CO expert trainer and speaker. Attendees will be trained to perform field testing, use CO testing instruments, identify Co safety limits, and effectively diagnose systems and solve problems. The second day of the workshop will include a written and hands-on exam to obtain certification as a "CO Analyst." For more details, call QSC at 800/533-7694.