HVAC Load Inflation Due to Envelope Leakage: Why Insulation Is Not Airtightness

Misunderstood Role of Insulation Thermal insulation is designed to resist conductive heat flow through walls, roofs and floors. By improving the thermal resistance (R-value) and reducing the U-value of building assemblies, insulation helps limit heat transfer between indoor and outdoor environments. However, insulation is not designed to stop airflow. For HVAC systems, that distinction can […]