N1102.3.4

Section N1102.3.4 is titled 'Opaque door exemption' and covers requirements for energy efficiency. The allowance for a maximum opaque door area per dwelling unit to be exempt from the U-factor requirements of another section of this code, and clarification that this exemption may not be used in conjunction with the U-factor and total UA alternative compliance methods is established. The purpose of this section is to allow for the use of doors manufactured before current energy code rating requirements, or other specialty doors.

The model shows a door which is less than 24 sq. ft. and allowed to be exempt from the prescriptive requirements of table N1102.1.2. (The standard prescriptive method is being used to determine compliance for the building).