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7.A. - Page 216 of 285 2019 Nonresidential New Construction Reach Code Cost Effectiveness Study 4.3 Cost Effectiveness Results -Small Hotel The following issues must be considered when reviewing the Small Hotel results: ♦ The Small Hotel is a mix of residential and nonresidential space types, which results in different occupancy and load profiles than the office and retail prototypes ♦ A potential laundry load has not been examined for the Small Hotel. The Reach Code Team attempted to characterize and apply the energy use intensity of laundry loads in hotels but did not find readily available data for use. Thus, cost effectiveness including laundry systems has not been examined. Contrary to the office and retail prototypes, the Small Hotel baseline water heater is a central gas storage type. Current compliance software cannot model central heat pump water heater systems with recirculation serving guest rooms.23 The only modeling option for heat pump water heating is individual water heaters at each guest room even though this is a very uncommon configuration. TRC modeled individual heat pump water heaters but as a proxy for central heat pump water heating performance, but integrated costs associated with tank and controls for central heat pump water heating into cost effectiveness calculations. Assuming central heat pump water heating also enabled the inclusion of a solar hot water thermal collection system, which was a key efficiency measure to achieving compliance in nearly all climate zones. Figure 31 through Figure 37 contain the cost-effectiveness findings for the Small Hotel packages. Notable findings for each package include: ♦ 1A — Mixed -Fuel + EE: ♦ Packages achieve +3 to +10% compliance margins depending on climate zone. ♦ Packages are cost effective using either the On -Bill or TDV approach in all Us except 12 (using SMUD rates), 14 (using SCE rates), and 15 (with SCE rates). ♦ The hotel is primarily guest rooms with a smaller proportion of nonresidential space. Thus, the inexpensive VAV minimum flow measure and lighting measures that have been applied to the entirety of the Medium Office and Medium Retail prototypes have a relatively small impact in the Small Hotel. 14 ♦ 1B — Mixed -Fuel + EE + PV + B: Packages are cost effective using either the On -Bill or TDV approach in all Us. Solar PV generally increases cost effectiveness compared to efficiency -only, particularly when using an NPV metric. ♦ 1C — Mixed -Fuel + HE: Packages achieve +2 to +5% compliance margins depending on climate zone. The package is cost effective using the On -Bill approach in a minority of climate zones, and cost effective using TDV approach only in CZ15. 23 The IOUs and CEC are actively working on including central heat pump water heater modeling with recirculation systems in early 2020. 24 Title 24 requires that hotel/motel guest room lighting design comply with the residential lighting standards, which are all mandatory and are not awarded compliance credit for improved efficacy. 41 2019-07-25 �.: