In order for air to flow, a difference in pressure is required as well as a continuous path between the two areas.

High Pressure

Low Pressure

Air flows from a high pressure to a low pressure, never from a low pressure to a high pressure

• The objective to keep in mind when building a home is to reduce air flow from the interior to the exterior as much as possible
• By reducing the amount of air flow through a building, you are reducing the amount of heat loss