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Table 406.2 <br />Energy Credits (2015 Code) <br />OPTION <br />DESCRIPTION <br />CREDIT(S) <br />Estimated Cost <br />la <br />EFFICIENT BUILDING ENVELOPE la: <br />0.5 <br />Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br />Vertical fenestration U = 0.28 <br />Floor R-38 <br />Slab on grade R-10 perimeter and under entire slab <br />Below grade slab R-10 perimeter and under entire slab <br />or <br />Compliance based on Section R402.1.4: Reduce the Total UA by 5%. <br />lb <br />EFFICIENT BUILDING ENVELOPE lb: <br />1.0 <br />Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br />Vertical fenestration U = 0.25 <br />Wall R-21 plus R-4 <br />Floor R-38 <br />Basement wall R-21 int plus R-5 ci <br />Slab on grade R-10 perimeter and under entire slab <br />Below grade slab R-10 perimeter and under entire slab <br />or <br />Compliance based on Section R402.1.4: Reduce the Total UA by 15%. <br />lc <br />EFFICIENT BUILDING ENVELOPE lc: <br />2.0 <br />Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br />Vertical fenestration U = 0.22 <br />Ceiling and single -rafter or joist -vaulted R-49 advanced <br />Wood frame wall R-21 int plus R-12 ci <br />Floor R-38 <br />Basement wall R-21 int plus R-12 ci <br />Slab on grade R-10 perimeter and under entire slab <br />Below grade slab R-10 perimeter and under entire slab <br />or <br />Compliance based on Section R402.1.4: Reduce the Total UA by 30%. <br />Ida <br />EFFICIENT BUILDING ENVELOPE Id: <br />0.5 <br />Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br />Vertical fenestration U = 0.24 <br />2a <br />AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2a: <br />0.5 <br />Compliance based on R402.4.1.2: Reduce the tested air leakage to 3.0 air changes per <br />hour maximum <br />and <br />All whole house ventilation requirements as determined by Section M1507.3 of the <br />International Residential Code shall be met with a high efficiency fan (maximum 0.35 <br />watts/cfin), not interlocked with the furnace fan. Ventilation systems using a furnace <br />including an ECM motor are allowed, provided that they are controlled to operate at <br />low speed in ventilation only mode. <br />To qualify to claim this credit, the building permit drawings shall specify the option <br />being selected and shall specify the maximum tested building air leakage and shall <br />show the qualifying ventilations stem. <br />2b <br />AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2b: <br />1.0 <br />Compliance based on Section R402.4.1.2: Reduce the tested air leakage to 2.0 air <br />changes per hour maximum <br />and <br />All whole house ventilation requirements as determined by Section M1507.3 of the <br />International Residential Code shall be met with a heat recovery ventilation system <br />with minimum sensible heat recovery efficiency of 0.70. <br />To qualify to claim this credit, the building permit drawings shall specify the option <br />being selected and shall specify the maximum tested building air leakage and shall <br />show the heat recovery ventilations stem. <br />0 <br />