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13. Where din/sq. ft. ventilation requirements result in conditions where the Building <br />Official determines that space heating requirements cannot reasonably be met <br />without combustion space heating systems. <br />14. Section C403.3.2 HVAC equipment performance requirements, is hereby deleted i 7t,,; <br />amended by the following at the beginning of the section with <br />remainder of section to remain to read- <br />C403.3.2 When HVAC fuel fired equipment is permitted to be installed, equipment shall <br />meet the minimum efficiency requirements of Tables C403.3.20) through C403.3.2(16) <br />when tested and rated in accordance with the applicable test procedure. Plate -type liquid - <br />to -liquid heat exchangers shall meet the minimum requirements of AHRI 400. The <br />efficiency shall be verified through certification under an approved certification program <br />or, where a certification program does not exist, the equipment efficiency ratings shall be <br />supported by data furnished by the manufacturer. Where multiple rating conditions or <br />performance requirements are provided, the equipment shall satisfy all stated requirements. <br />Where components, such as indoor or outdoor coils, from different manufacturers are used, <br />calculations and supporting data shall be furnished by the designer that demonstrates that <br />the combined efficiency of the specified components meets the requirements herein. <br />Page 9 of 29 <br />