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Building Code Board of Appeals <br />Agenda <br />September 25, 2024 <br />Page 10 of 64 <br />Table C401.4 (Mandatory) <br />Requirements for Commercial Buildings <br />Title IECC Section <br />Air leakage C402.5 <br />Calculation of heating and cooling loads C403.1.1 <br />Data centers C403.1.2 <br />System Design C403.2 <br />Heating and cooling equipment <br />efficiency C403.3 <br />C403.4, except C403.4.3, <br />Heating and cooling system controls C403.4.4, C403.4.5 <br />Economizer fault detection and <br />diagnostics C403.5.5 <br />Ventilation and exhaust systems C403.7, except C403.7.4.1 <br />Fan and fan controls C403.8, except C403.8.6 <br />Large diameter ceiling fans C403.9 <br />Refrigeration equipment performance C403.11, except C403.11.3 <br />Construction of HVAC system elements C403.12 <br />Mechanical systems located outside of <br />the building thermal envelope C403.13 <br />Service water heating C404 <br />Electrical power and lighting systems C405, except C405.3 <br />Maintenance information and system <br />commissioning C408 <br />8. Table C402.1.3 Opaque Thermal Envelope Insulation Component <br />Minimum Requirements, R-Value Method, is hereby deleted and <br />replaced with the following: <br />Table C402.1.3 (Mandatory) <br />Opaque Thermal Envelope Insulation Component of an Average <br />Minimum Requirements, R-Value Method in following locations: <br />Roof C402.2.1 <br />Insulation entirely above roof deck R-49 <br />Metal buildings" R-21 + R-11 LS <br />Attic and other R-49 <br />Walls. Above grade C402.2.2 <br />Massd R-21 <br />Metal buildings R-21 + R-10ci <br />