2404 74TH ST SE 2022 Plans 2024-05-16

SECTION R406 11 ADDITIONAL ENERGY EFFICIENCY REQUIREMENTS R406.1 Scope.This section establishes additional energy efficiency requirements for all new construction covered by this code, including additions subject to Section R502 and change of occupancy or use subject to Section R505 unless specifically exempted in Section R406. Credit from both Sections R406.2 and R406.3 are required. • R406.2 Carbon emission equalization.This section establishes a base equalization between fuels used to define the equivalent carbon emissions of the options specified.The permit shall define the base fuel selection to be used and the points specified in Table R406.2 shall be used to modify the requirements in Section R406.3.The sum of credits from Tables R406.2 and R406.3 shall meet the requirements of Section R406.3. R406.3 Additional energy efficiency requirements. Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 so as to achieve the following minimum number of credits: 1. Small Dwelling Unit: 13.0 c edits Dwelling units less than 1500 square feet in conditioned floor area with less* square feet of fenestration area.Additions to existing building greater than 500 square feet of heated floor area but less than 1500 square feet. 2. Medium Dwelling Unit: 6.0 credits All dwelling units that are not included in#1,#3 or#4. 3. Large Dwelling Unit: 7.0 credits Dwelling units exceeding 5000 square feet of conditioned floor area. 4. Dwelling units serving R-2 occupancies: 4.5 credits 5. Additions less than or equal to 500 square feet 1.5 credits The drawings included with the building permit application shall identify which options have been selected and the point value of each option, regardless of whether separate mechanical, plumbing, electrical, or other permits are utilized for the project. TABLE R406.2 • FUEL NORMALIZATION CREDITS • • System Credits Description of Primary Heating Source — ---I Type A0 tither Group R-2 I Combustion heating equipment meeting minimum 0 0 federal efficiency standards for the equipment listed in Table C403.3.2(4)or C403.3.2(5) 2 For an initial heating system using a heat pump 1.0 1.0 that meets federal,standards for the equipment listed in Table C403.3.2(1)C or C403.3.2(2) or I 1 Air to water heat pump units that are configured to provide both heating and cooling and are rated in accordance with AHRI 550/590 3 ! For heating system based on electric resistance -1.0 i -1.0 only(either forced air or Zonal) 4 I For heating system based on electric resistance j 0.5 N/A with a ductless mini-split heat pump system in accordance with Section R403.7.1 including the exception 5 All other heating systems ! -1 -0.5 2018 Washington State Energy Code RE-41