ORD 2020-010 2018-2020 - Laserfiche WebLink

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[ ] Fuel type: Electric Cooling systems'f Efficiency: in accordance with prevailing federal As proposed minimum standards. Capacity: sized in accordance with Section R403.7. As proposed [As-PreP ] [ d] Fuel type: same as proposed design As proposed Service water heatingd°e, Efficiency: in accordance with prevailing federal As proposed f,g minimum standards. Use: Same as proposed design gal/day=30 + (10 x NO. Duct insulation: From Section R403.2.1 As tested or as A thermal distribution system efficiency(DSE) of 0.88 specified in Table Thermal distribution shall be applied to both the heating and cooling system R405.5.2(2) if not systems efficiencies for all systems other than tested duct tested. Duct systems. For tested duct systems,the leakage rate shall insulation shall be be 4 cfm (113.3 L/min)per 100 ft (9.29 m2) of as proposed. conditioned floor area at a pressure of differential of 0.1 inches w.g. (25 Pa). Thermostat Type: Manual, cooling temperature setpoint= 75°F; Same as standard Heating temperature setpoint= 72°F reference For SI: 1 square foot=0.93 m2, 1 British thermal unit= 1055 J, 1 pound per square foot=4.88 kg/m2, 1 gallon(US)=3.785 L, °C=(°F-32)/1.8, 1 degree=0.79 rad. a. Where required by the code official,testing shall be conducted by an approved party. Hourly calculations as specified in the ASHRAE Handbook of Fundamentals, or the equivalent shall be used to determine the energy loads resulting from infiltration. b. The combined air exchange rate for infiltration and mechanical ventilation shall be determined in accordance with Equation 43 of 2001 ASHRAE Handbook of Fundamentals,page 26.24 and the"Whole- house Ventilation"provisions of 2001 ASHRAE Handbook of Fundamentals,page 26.19 for intermittent mechanical ventilation. c. Thermal storage element shall mean a component not part of the floors,walls or ceilings that is part of a passive solar system,and that provides thermal storage such as enclosed water columns,rock beds, or phase-change containers.A thermal storage element must be in the same room as fenestration that faces within 15 degrees(0.26 rad)of true south, or must be connected to such a room with pipes or ducts that allow the element to be actively charged. d. For a proposed design with multiple heating, cooling or water heating systems using different fuel types, the applicable standard reference design system capacities and fuel types shall be weighted in accordance with their respective loads as calculated by accepted engineering practice for each equipment and fuel type present. e. For a proposed design without a proposed heating system,a heating system with the prevailing federal minimum efficiency shall be assumed for both the standard reference design and proposed design. f. For a proposed design home without a proposed cooling system, an electric air conditioner with the prevailing federal minimum efficiency shall be assumed for both the standard reference design and the proposed design. g. For a proposed design with a nonstorage-type water heater,a 40-gallon storage-type water heater with the prevailing federal minimum energy factor for the same fuel as the predominant heating fuel type shall be assumed. For the case of a proposed design without a proposed water heater, a 40-gallon storage-type water heater with the prevailing federal minimum efficiency for the same fuel as the predominant heating fuel type shall be assumed for both the proposed design and standard reference design. h. For residences with conditioned basements, R-2 and R-4 residences and townhouses,the following formula shall be used to determine glazing area: 24