Chapter 4Residential Energy Efficiency Section 401. General {As in IECC-R} Section 402. Building Thermal Envelope {As in IECC-R} Sections 403 to 404. {As in IECC-R} Section 405. Total Building Performance {As in IECC-R, subject to the following MBPS Modification:} Section 406. Energy Rating Index Compliance Alternative Sections 407 to 408. {As in IECC-R}
