Air leakage control manual for existing multi-unit residential buildings

Excessive air leakage can undermine the performance of space heating and cooling systems if the systems were not designed to deal with the loads imposed by the continuous and uncontrolled movement of outdoor air into the building. [...] These pressures will force air into the side of the building the wind hits and For air leakage to occur ther e must be a force draw air out of the opposite side through (that is, an air pressure difference) and a hole any leaks in the building envelope. [...] The higher the building, and the greater the indoor-outdoor temperature difference, the greater the stack pressures will be. [...] For instance, if the plane of the parking garage and in the par tition walls airtightness extends up to the mechanical between the parking garage and the core penthouse on the top of a building, it may not of the building must be found and sealed. [...] In system that encloses the foundation and separates addition to defining the existing air leakage the parking garage from the core of the building.