AIR SEALING WITH THE BLOWER DOOR This two day course is intended for beginning through intermediate blower door users. The emphasis is on air sealing techniques and utilizing the blower door as a daily tool. Specific approaches and appropriate materials are introduced and demonstrated. Other topics covered are the fundamentals of air exchange, the influence of air sealing on indoor air quality, combustion appliances, and relative humidity levels. Hands-on work in the field is included in this session. Building Technician I and Building Analyst Certification components are included in this class.