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• � <br /> All whole house ventilation requirements as determined by 0.5 <br /> Section M1508 of the Washington State Residential Code <br /> shall be met with a heat recovery ventilation system in <br /> accordance with Section M 1508.7 of that Code. <br /> 4b ADDITIONAL AIR LEAKAGE CONTROL AND <br /> EFFICIENT VENTILATION: <br /> Envelope leakage reduced to SLA of 0.00015 building 1 <br /> and <br /> All whole house ventilation re uirements as determined b <br /> Sa EFFICIENT WATER HEATING:' <br /> Water heating system shall include one of the following: <br /> Gas, propane or oil water heater with a minimum EF of 0.62. <br /> or <br /> Electric Water Heater with a minimum EF of.93. 0.5 <br /> and for both cases <br /> All showerhead and kitchen sink faucets installed in the <br /> house shall meet be rated at 1.75 GPM or less. All other <br /> lavatory faucets shall be rated at 1.0 GPM ar Iess.2 <br /> Sb HIGH EFFICIENCY WATER HEATING:1 <br /> Water heating system shall include one of the following: <br /> Gas,propane or oil water heater with a minimum EF of 0.82. <br /> or <br /> Solar water heating supplementing a minimum standard water <br /> heater. Solar water heating will provide a rated minimum 1.5 <br /> savings of 85 thenns or 2000 kWh based on the Solar Rating <br /> and Certification Corporation(SRCC)Annual Performance <br /> of OG-300 Certified Solar Water Heating Systems. <br /> or <br /> Electric heat um water heater with a minimum EF of 2.0. <br /> 6 SMALL DWELLING UNIT 1:' <br /> Dwelling units less than 1500 square feet in floor area with <br /> less than 300 square feet of window.+door area. Additions 1 <br /> to existing building that are less than 750 square feet of <br /> heated floor area. <br /> 7 LARGE DWELLING U1vIT 1:1 <br /> Dwelling units exceeding 5000 square feet of floor area shall _i <br /> be assessed a deduction for purposes of complying with <br /> Section 901 of this Code. <br /> g RENEWABLE ELECTRIC ENERGY: <br /> For each 1200 kWh of electrical generation provided <br /> annually by on-site wind or solar equipment a 0.5 credit shall <br /> be allowed, up to 3 credits.Generation shall be calculated as <br /> follows: <br /> For solar electric systems,the design shall be demonstrated to <br /> meet this requirement using the National Renewable Energy <br /> Laboratory calculator PVWATTs. Documentation noting <br /> solar access shall Ue included on the plans. 0.5 <br /> For wind generation projects designs shall document annual <br /> power generation based on the following factors: <br /> WSEC Prescriptive Worksheet(2010 Edition) WSUEP10-010 Copyright 2010 <br /> /� ! <br />