Understanding Air Infiltration and Exfiltration in Home Energy Efficiency #3436136 (License: Personal Use)

The image depicts a detailed cross-sectional view of a two-story residential structure, highlighting pathways where conditioned air escapes (exfiltration, shown in red) and outdoor air enters (infiltration, shown in blue). Key leakage points include windows, doors, attic penetrations, and the foundation, with visible insulation layers and HVAC ductwork illustrating thermal barriers and airflow dynamics. The diagram serves as an educational tool for identifying energy loss sources in building envelopes.

Used on energy efficiency, HVAC, or home retrofitting webpages to explain air leakage concepts; targets homeowners, contractors, and sustainability professionals seeking to improve building performance and reduce utility costs.