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7.A. - Page 179 of 285 2019 Nonresidential New Construction Reach Code Cost Effectiveness Study <br />Calculation Method Reference Manual.' The Standard Design is the baseline for all nonresidential projects <br />and assumes a mixed -fuel design using natural gas as the space heating source in all cases. Baseline HVAC <br />and SWH system characteristics are described below and in Figure 2: <br />♦ The baseline medium office HVAC design package includes two gas hot water boilers, three <br />packaged rooftop units (one for each floor), and variable air volume (VAV) terminal boxes with <br />hot water reheat coils. The SWH design includes one 8.75 kW electric resistance hot water heater <br />with a 30 -gallon storage tank. <br />♦ The baseline medium retail HVAC design includes five single zone packaged rooftop units (variable <br />flow and constant flow depending on the zone) with gas furnaces for heating. The SWH design <br />includes one 8.75 kW electric resistance hot water heater with a 30 -gallon storage tank. <br />♦ The small hotel has two baseline equipment systems, one for the nonresidential spaces and one <br />for the guest rooms. <br />♦ The nonresidential HVAC design includes two gas hot water boilers, four packaged rooftop <br />units and twelve VAV terminal boxes with hot water reheat coils. The SWH design include a <br />small electric resistance water heater with 30 -gallon storage tank. <br />♦ The residential HVAC design includes one single zone air conditioner (AC) unit with gas <br />furnace for each guest room and the water heating design includes one central gas water <br />heater with a recirculation pump for all guest rooms. <br />rigure <br />L. i-rototype unaracteristics summary <br />Medium Office <br />Medium Retail <br />Small Hotel <br />Conditioned Floor Area <br />53,628 <br />24,691 <br />42,552 <br />Number of Stories <br />3 <br />1 <br />4 <br />Number of Guest Rooms <br />0 <br />0 <br />78 <br />Window -to -Wall Area Ratio <br />0.33 <br />0.07 <br />0.11 <br />Nonresidential: Packaged DX VAV <br />Packaged DX VAV with gas <br />with hot water coil + VAV <br />furnaces + VAV terminal <br />Single zone packaged <br />terminal units with hot water <br />Baseline HVAC System <br />units with hot water reheat. <br />DX units with gas <br />reheat. Central gas hot water <br />Central gas hot water <br />furnaces <br />boilers. <br />boilers <br />Residential: Single zone DX AC <br />unit with gas furnaces <br />Nonresidential: 30 -gallon electric <br />30 -gallon electric <br />Baseline Water Heating <br />30 -gallon electric resistance <br />resistance water heater <br />System <br />water heater <br />resistance water <br />Residential: Central gas water <br />heater <br />heater with recirculation loop <br />' Nonresidential Alternative Calculation Method Reference Manual For the 2019 Building Energy Efficiency Standards. Available <br />at: https://www.energy.ca.gov/2019publications/CEC-400-2019-006/CEC-400-2019-006-CMF.pdf <br />4 <br />RE <br />2019-07-25 <br />431 <br />