AgdaPkt 2020-01-13 Joint - Laserfiche WebLink

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7.A. - Page 196 of 285 2019 Nonresidential New Construction Reach Code Cost Effectiveness Study The Reach Code Team calculated costs to increase electrical capacity for heat pump water heaters in the small hotel similarly. Figure 13. Medium Office Electrical Infrastructure Costs for All -Electric Design A - No. VAV Boxes 60 B - VAV box heating capacity (watts) 4,748 C - No. hot water pumps 2 D - Hot water pump power (watts) 398 E - Voltage 208 F (AxB - CxD)/E Panel ampacity required 1,366 G F/400 Number of 400 -amp panels required 4 H - Cost per 400 -amp panel $3,100 1 GxH Total panel cost $12,400 J - Total electrical line length required (ft) 4,320 K - Cost per linear foot of electrical line $3.62 L JxK Total electrical line cost $15,402 I + L Total electrical infrastructure incremental cost $27,802 3.3.2.2 Natural Gas This analysis assumes that in an all -electric new construction scenario natural gas would not be supplied to the site. Eliminating natural gas in new construction would save costs associated with connecting a service line from the street main to the building, piping distribution within the building, and monthly connection charges by the utility. The Reach Code Team determined that for a new construction building with natural gas piping, there is a service line (branch connection) from the natural gas main to the building meter. In the medium office prototype, natural gas piping is routed to the boiler. The Reach Code Team assumed that the boiler is on the first floor, and that 30 feet of piping is required from the connection to the main to the boiler. The Reach Code Team assumed 1" corrugated stainless steel tubing (CSST) material is used for the plumbing distribution. The Reach Code Team included costs for a natural gas plan review, service extension, and a gas meter, as shown in Figure 14 below. The natural gas plan review cost is based on information received from the City of Palo Alto Utilities. The meter costs are from PG&E and include both material and labor. The service extension costs are based on guidance from PG&E, who noted that the cost range is highly varied and that there is no "typical" cost, with costs being highly dependent on length of extension, terrain, whether the building is in a developed or undeveloped area, and number of buildings to be served. While an actual service extension cost is highly uncertain, the team believes the costs assumed in this analysis are within a reasonable range based on a sample range of costs provided by PG&E. These costs assume development in a previously developed area. 21 © 2019-07-25 448