5.9.2.4.Heat Transfer

(1) Windows, doors and skylights shall meet the heat transfer performance requirements stated in Section 5.3. (See Note A-5.3.1.2.)) (2) Except as provided in Sentence (3), all metal-framed glazed assemblies separating interior conditioned space from interior unconditioned space or exterior space shall incorporate a thermal break to minimize condensation. (3) Metal-framed glazed assemblies need not comply with Sentence (2) where these assemblies are (a) storm windows or doors, or (b) windows or doors that are required to have a fire-protection rating. (See Note A-5.9.2.4.(3))