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Maximum Window U-value with 90% AFUE space heating and R-10 Foundation Wall Insulation <br /> Max.Total Window and Door Area <br /> as a percent of exposed wall 10% 12% 14% 16% 18% 20% 22% 24% 26% 28% <br /> Wall Type: <br /> 2x4,R-13 insulation, <R-5 sheathing 0.37 0.37 0.33 0.28 0.25 0.22 0.20 0.18 0.17 0.15 <br /> 2x4,R-13 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.33 0.30 0.27 0.25 0.23 <br /> 2x4,R-13 insulation, >R-7 sheathing 0.37 0.37 0.37 0.37 0.37 0.36 0.33 0.30 0.27 0.25 <br /> 2x6,R-19 Insulation, <R-5 sheathing 0.37 0.37 0.37 0.37 0.36 0.32 0.29 0.27 0.24 0.23 <br /> 2x6,R-19 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.39 0.35 0.32 0.29 0.27 <br /> 2x6,R-21 insulation, <R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.35 0.31 0.29 0.26 0.24 <br /> 2x6,R-21 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.37 ,0.36 0.33 0.30 0.28 <br /> • <br /> Maximum Window U-value with 90% AFUE space heating and R-5 up to R-10 Exterior Foundation Wall Insulation <br /> Max. Total Window and Door Area <br /> as a percent of exposed wall 10% 12% 14% 16% 18% 20% 22% 24% 26% 28% <br /> Wall Type: <br /> 2x4,R-13 insulation, <R-5 sheathing 0.37 0.36 0.30 0.26 0.23 0.20 0.18 0.16 0.15 0.14 <br /> 2x4,R-13 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.35 0.31 0.28 0.25 0.23 0.22 <br /> 2x4,R-13 insulation, >R-7 sheathing 0.37 0.37 0.37 0.37 0.37 0.34 0.31 0.28 0.26 0.24 <br /> 2x6,R-19 insulation, <R-5 sheathing 0.37 0.37 0.37 0.37 0.34 0.31 0.28 0.25 0.23 0.21 <br /> 2x6,R-19 insulation, >R-5 sheathing 0.37 b.37 0.37 0.37 0.37 0.37 0,33 0.30 0.28 0.26 <br /> 2x6,R-21 insulation, <R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.33 0.30 0.27 0.25 0.23 <br /> 2x6,R-21 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.37 0.35 0.31 0.29 0.27 <br /> Maximum Window U-value with 90% AFUE s•ace heatin: and R-19 or_•realer foundation wall insulation <br /> Max. Total Window and Door Area <br /> • <br /> as a percent of exposed wall 10% 12% 14% 16% 18% 20% 22% 24% 26% 28% <br /> Wall Type: <br /> 2x4,R-13 insulation, <R-5 sheathing 0.37 0.37. 0.34 0.29 0.26 0.23 0.21 0.19 0.17 0.16 <br /> 2x4,R-13 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.34 0.31 0.28 0.26 0.24 <br /> 2x4,R-13 insulation, >R-7 sheathing 0.37 0.37 0.37 0.37 0.37 0.37 0.34 0.31 0.28 0.24 <br /> 2x6,R-19 insulation, <R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.34 ' 0.30 0.28 0.25 0.23 <br /> 2x6,R-19 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37 0.37 0.37 0.36 0.33 0.30 0.28 <br /> 2x6,R-21 insulation, <R-5 sheathing 0.37 0.37 0.37. 0.37 0.37 0.36 0.32 0.29 0.27 0.25 <br /> • 2x6,R-21 insulation, >R-5 sheathing 0.37 0.37 0.37 0.37. 0.37 . 0.37 0.37 0.34 0.31 0.29 <br /> This is a summary only. Other requirements may apply. See the Minnesota Energy Code. <br /> Questions? Call Department of Public Service Information Center at 651 296 5175 or S00 657 3710. ��/��'f <br /> / Page 4 <br />