What is : Air Infiltration

What is Air Infiltration?

Air infiltration refers to the unintentional or unwanted flow of air into a building through cracks, gaps, or openings in the walls, windows, doors, or roof. This phenomenon can lead to energy loss, decreased indoor air quality, and discomfort for the occupants.

Causes of Air Infiltration

There are several factors that can contribute to air infiltration, including poorly sealed windows and doors, gaps in the building envelope, and inadequate insulation. Additionally, wind pressure, temperature differentials, and the stack effect can also play a role in allowing outside air to enter the building.

Effects of Air Infiltration

When air infiltration occurs, it can result in higher energy bills as the HVAC system works harder to maintain a comfortable indoor temperature. It can also lead to drafts, uneven heating and cooling, and moisture problems, which can promote mold growth and compromise the structural integrity of the building.

Preventing Air Infiltration

To prevent air infiltration, it is important to properly seal all gaps and cracks in the building envelope, install weatherstripping on windows and doors, and ensure that insulation is installed correctly. Regular maintenance and inspections can help identify and address potential air leakage points.

Testing for Air Infiltration

Building professionals can conduct blower door tests or infrared thermography to detect air infiltration in a building. These tests can help pinpoint areas of air leakage and guide the implementation of effective air sealing measures.

Conclusion

Addressing air infiltration is essential for improving energy efficiency, indoor comfort, and overall building performance. By understanding the causes and effects of air infiltration, building owners and occupants can take proactive steps to mitigate this issue and create a healthier and more sustainable living environment.