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7.A. - Page 63 of 285 <br />2019 Energy Efficiency Ordinance Cost-effectiveness Study <br />Table 4: Incremental Cost Assumptions <br />10 <br />2019-08-01 <br />315 <br />Incremental Cost (2020 PV$) <br />Multifamily <br />Performance <br />(Per Dwelling <br />Measure <br />Level <br />Single Family <br />Unit) <br />Source & Notes <br />Non -Preempted Measures <br />Reduced <br />3.0 vs 5.0 ACH50 <br />$391 <br />n/a <br />NREL's BEopt cost database ($0.115/ftz for 3 ACH50 & $0.207/ft2 for 2 ACH50) + $100 HERS <br />Infiltration <br />2.0 vs 5.0 ACH50 <br />$613 <br />n/a <br />rater verification. <br />Window U- <br />$4.23/ftz window area based on analysis conducted for the 2019 and 2022 Title 24 cycles <br />0.24 vs 0.30 <br />$2,261 <br />$607 <br />factor <br />(Statewide CASE Team, 2018). <br />Data from CASE Report along with direct feedback from Statewide CASE Team that higher <br />Window SHGC <br />0.50 vs 0.35 <br />$0 <br />$0 <br />SHGC does not necessarily have any incremental cost (Statewide CASE Team, 2017d). Applies <br />to CZ 1,35,16. <br />Cool Roof - <br />0.25 vs 0.20 <br />$237 <br />$58 <br />Costs based on 2016 Cost-effectiveness Study for Cool Roofs reach code analysis for 0.28 solar <br />Aged Solar <br />Reflectance <br />0.20 vs 0.10 <br />$0 <br />$0 <br />reflectance product. (Statewide Reach Codes Team, 2017b). <br />Exterior Wall <br />R 7.5 R 5 <br />$818 <br />Based on increasing exterior insulation from 1" R-5 to 1.5" R-7.5 in a 2x6 wall (Statewide CASE <br />Insulation <br />vs <br />n/a <br />Team, 2017c). Applies to single family only in all climates except CZ 6, 7. <br />Under -Deck <br />R-13 vs R-0 <br />$1,338 <br />$334 <br />Costs for R-13 ($0.64/ft2), R-19 ($0.78/ft2) and R-30 ($1.61/ft2) based on data presented in the <br />R-19 vs R-13 <br />$282 <br />$70 <br />Roof <br />2019 HPA CASE Report (Statewide CASE Team, 2017b) along with data collected directly from <br />Insulation <br />builders during the 2019 CASE process. The R-30 costs include additional labor costs for <br />R-30 vs R-19 <br />$1,831 <br />$457 <br />(HPA) <br />cabling. Costs for R-38 from NREL's BEopt cost database. <br />R-38 vs R-30 <br />$585 <br />$146 <br />Attic Floor <br />R-38 vs R-30 <br />$584 <br />$146 <br />Insulation <br />NREL's BEopt cost database: $0.34/ft2 ceiling area <br />R-10 vs R-0 <br />$553 <br />$121 <br />$4/linear foot of slab perimeter based on internet research. Assumes 16in depth. <br />Slab Edge <br />$1.58/linear foot of slab perimeter based on NREL's BEopt cost database. This applies to CZ 16 <br />Insulation <br />R-10 vs R-7 <br />$157 <br />$21 <br />only where R-7 slab edge insulation is required prescriptively. Assumes 16in depth. <br /><12 feet in attic <br />$358 <br />n/a <br />Ducts in <br />Conditioned <br />$658 <br />n/a <br />Costs based on a 2015 report on the Evaluation of Ducts in Conditioned Space for New <br />Duct Location <br />Space <br />California Homes (Davis Energy Group, 2015). HERS verification cost of $100 for the Verified <br />Verified Low <br />Low Leakage Ducts in Conditioned Space credit. <br />Leakage Ducts in <br />$768 <br />$110 <br />Conditioned <br />Space <br />10 <br />2019-08-01 <br />315 <br />