Stack pressure is the movement of air in and out of your building. In the cities we serve here in Ontario, climates change constantly. With different pressure being seen in the summer and winter, there is a need for equalization from your HVAC system.

For example, in apartment buildings, our technicians have seen high winds from the exterior impact the operation of automatic door operators. In other words, apartment units, elevators, and HVAC systems can all work against the air infiltration from outside. If not properly pressurized, facility managers may have challenges keeping doors closed and secured