The prerequisite (EA3.1) specifies a maximum air leakage rate (which varies by IECC climate zone) and requires that the rate be tested and verified by an energy rater. The credit (EA3.2) awards either 2 points for "greatly reduced envelope leakage" or 3 points for "minimal envelope leakage" – i.e., air leakage significantly reduced below the levels required by the prerequisite. (As described above for EA2, EA1 and EA3 are mutually exclusive.) Because of its effectiveness as an air sealer and its ability to fill hard-to-reach voids, Spray Polyurethane Foam supports achievement of this credit.