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Find and reduce an unwanted draft
Reducing unintended leakage can lower heating and cooling demand.
What changes the result
It overlaps with other draft-proofing measures, so savings should not be counted twice.
Check what you already own before buying something. The benefit comes from repeated use.
References in the original project +
US DOE (2023); BRE (2019); EU Commission (2023)
These bibliographic references come from the original cards. They provide context; they do not validate every numerical assumption below.
