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TABLE 406.3(continued) <br /> ENERGY CREDITS <br /> CREDIT(S) <br /> OPTION DESCRIPTION — —� <br /> All Other Group R-2 <br /> 1.6 Prescriptive compliance is based on Table R402.1.1 with the following 3.0 2.0 ' <br /> modifications: <br /> Vertical fenestration U=0.18 <br /> Ceiling and single-rafter or joist-vaulted R-60 advanced <br /> Wood frame wall R-21 int plus R-16 ci <br /> Floor R-48 <br /> Basement wail R-21 int plus R-16 ci <br /> Slab on grade R-20 perimeter and under entire slab <br /> Below grade slab R-20 perimeter and under entire slab <br /> or <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA <br /> by 40%. <br /> 1.7 Advanced framing and raised heel trusses or rafters 0.5 0.5 <br /> Vertical Glazing U-0.28 <br /> R-49 Advanced(U-0.020)as listed in Section A102.2.1, Ceilings below a <br /> vented attic <br /> and <br /> R-49 vaulted ceilings with full height of uncompressed insulation extending <br /> over the wall top plate at the eaves. <br /> 2.AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION OPTIONS --� <br /> Only one option from Items 2.1 through 2.4 may be selected in this category. <br /> (2.1 Compliance based on R402.4.1.2: 0 5 1,0 <br /> 1./ Reduce the tested air leakage to 3.0 air changes per hour maximum at 50 <br /> Pascals <br /> or <br /> For R-2 Occupancies,optional compliance based on Section R402.4.1.2: <br /> Reduce the tested air leakage to 0.3 cfm/ft2 maximum at 50 Pascals <br /> and <br /> All whole house ventilation requirements as determined by Section <br /> M1507.3 of the International Residential Code or Section 403.8 of the <br /> International Mechanical Code shall be met with a high efficiency fan(s) <br /> I i (maximum 0.35 watts/cfm),not interlocked with the furnace fan(if present). <br /> Ventilation systems using a furnace including an ECM motor are allowed, <br /> provided that they are controlled to operate at low speed in ventilation only <br /> mode. <br /> To qualify to claim this credit,the building permit drawings shall specify the <br /> option being selected,the maximum tested building air leakage,and shall <br /> show the qualifying ventilation system and its control sequence of <br /> operation. <br /> 2018 Washington State Energy Code RE-43 <br />