What is a typical effect of improved airtightness in a building?

Improved airtightness in a building leads to reduced air leakage, which significantly contributes to enhanced energy efficiency. When a building is more airtight, it prevents unwanted drafts and helps maintain a consistent indoor temperature. This control over air exchange means that heating and cooling systems do not have to work as hard to compensate for losing conditioned air to the outside. As a result, homeowners can experience lower energy bills due to reduced heating and cooling costs.

While other factors also come into play regarding indoor air quality and humidity, improved airtightness primarily impacts energy efficiency by minimizing the energy required to condition indoor spaces, ultimately providing a direct financial benefit in terms of lower utility costs.