WAC 51-11R-40520. Section R405.2 — Performance based compliance

R405.2 Performance based compliance. Compliance based on total building performance requires that a proposed design meet all of the following: 1. The requirements of the sections indicated within Table R405.2. 2. For structures less than 1,500 square feet of conditioned floor area, the annual site energy consumption shall be less than or equal to 64 percent of the annual site energy consumption of the standard reference design . 3. For structures 1,500 to 5,000 square feet of conditioned floor area, the annual site energy consumption shall be no more than 47 percent of the standard reference design . 4. For structures over 5,000 square feet of conditioned floor area, the annual site energy consumption shall be no more than 41 percent of the standard reference design . 5. For structures serving Group R-2 occupancies, the annual site energy consumption shall be less than or equal to 61 percent of the annual site energy consumption of the standard reference design . See Section R401.1 and residential building in Section R202 for Group R-2 scope. Energy use derived from simulation analysis shall be expressed in Btu per square foot of conditioned floor area per year. TABLE R405.2 MANDATORY COMPLIANCE MEASURES FOR TOTAL BUILDING PERFORMANCE Section a Title Comments General R401.3 Certificate Envelope R402.1.1 Vapor retarder R402.2.3 Eave baffle R402.2.4.1 Access hatches and doors R402.4 Air leakage R402.5 Maximum fenestration U -factor Systems R403.1 Controls R403.3 Ducts Except for R403.3.2 and R403.3.3 R403.4 Mechanical system piping insulation R403.5.1 Heated water circulation and temperature maintenance system R403.5.3 Drain water heat recovery units R403.6 Mechanical ventilation R403.7 Equipment sizing and efficiency rating R403.8 Systems serving multiple dwelling units R403.9 Snow melt system controls R403.10 Energy consumption of pools and spas R403.11 Portable spas R403.12 Residential pools and permanent residential spas Electrical Power and Lighting R404.1 Lighting equipment R404.2 Interior lighting controls Section a Title Comments General R401.3 Certificate Envelope R402.1.1 Vapor retarder R402.2.3 Eave baffle R402.2.4.1 Access hatches and doors R402.4 Air leakage R402.5 Maximum fenestration U -factor Systems R403.1 Controls R403.3 Ducts Except for R403.3.2 and R403.3.3 R403.4 Mechanical system piping insulation R403.5.1 Heated water circulation and temperature maintenance system R403.5.3 Drain water heat recovery units R403.6 Mechanical ventilation R403.7 Equipment sizing and efficiency rating R403.8 Systems serving multiple dwelling units R403.9 Snow melt system controls R403.10 Energy consumption of pools and spas R403.11 Portable spas R403.12 Residential pools and permanent residential spas Electrical Power and Lighting R404.1 Lighting equipment R404.2 Interior lighting controls a Reference to a code section includes all the relative subsections except as indicated in the table. a Reference to a code section includes all the relative subsections except as indicated in the table.