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5. Section C401.2.2 ASHRAE 90.1, is hereby deleted in its entirety. <br />6. A new Section C401.4 Mandatory Requirements for Commercial <br />Buildings, is hereby added to read as follows: <br />C401.4 Mandatory Requirements for Commercial Buildings. <br />Commercial buildings must comply with Table C401.4. <br />Table C401.4 (Mandatory) <br />Requirements for Commercial Buildings <br />Title <br />IECC Section <br />Air leakage <br />C402.5 <br />Calculation of heating and cooling loads <br />C403.1.1 <br />Data centers <br />C403.1.2 <br />System Design <br />C403. <br />Heating and cooling equipment <br />efficiency except as required by <br />Louisville's prescriptive Sec. 15.60.060 <br />C403.3 <br />Heating and cooling system controls <br />C403.4, except C403.4.3, <br />C403.4.4, C403.4.5 <br />Economizer fault detection and <br />diagnostics <br />C403.5.5 <br />Ventilation and exhaust systems <br />C403.7, except C403.7.4.1 <br />Fan and fan controls <br />C403.8, exept C403.8.6 <br />Large diameter ceiling fans <br />C403.9 <br />Refrigeration equipment performance <br />C403.11, except C403.11.3 <br />Construction of HVAC system elements <br />C403.12 <br />Mechanical systems located outside of <br />the building thermal envelope <br />C403.13 <br />Service water heating <br />C404 <br />Electrical power and lighting systems <br />C405, except C405.3 <br />Maintenance information and system <br />commissioning <br />C408 <br />7. Table C402.1.3 Opaque Thermal Envelope Insulation Component <br />Minimum Requirements, R-Value Method, is hereby added to read as follows: <br />Table C401.4 (Mandatory) <br />E <br />