![]() Shading is on during the day if the solar radiation incident on the window exceeds SetPoint (W/m 2) and if the zone cooling rate in the previous timestep is non-zero. OnNightAndOnDayIfCoolingAndHighSolarOnWindow: Shading is on at night. Daytime shading is subject to schedule, if specified. OffNightAndOnDayIfCoolingAndHighSolarOnWindow: Shading is off at night. They are applicable to any Shading Type except ExteriorScreen but are most appropriate for interior or exterior blinds, interior or exterior shades with low insulating value, or switchable glazing. The following control types can be used to reduce zone cooling load. Night and day shading is subject to schedule, if specified. Shading is on during the day if the zone cooling rate in the previous timestep is non-zero. OnNightIfHeatingAndOnDayIfCooling: Shading is on at night if the zone heating rate in the previous timestep exceeds SetPoint (W). OnNightIfLowOutdoorTempAndOnDayIfCooling: Shading is on at night if the outside air temperature is less than SetPoint (C). They are applicable to any Shading Type except ExteriorScreen but are most appropriate for translucent interior or exterior shades with high insulating value (“translucent movable insulation”). The following two control types can be used to reduce zone heating and cooling load. OnNightIfHeatingAndOffDay: Shading is on at night if the zone heating rate in the previous timestep exceeds SetPoint (W) and schedule, if specified, allows shading. OnNightIfLowInsideTempAndOffDay: Shading is on at night if the zone air temperature in the previous timestep is less than SetPoint (C) and schedule, if specified, allows shading. OnNightIfLowOutdoorTempAndOffDay: Shading is on at night if the outside air temperature is less than SetPoint (C) and schedule, if specified, allows shading. “Night” means the sun is down and “day” means the sun is up. They are applicable to any Shading Type except ExteriorScreen but are most appropriate for interior or exterior shades with high insulating value (“movable insulation”). The following three control types can be used to reduce zone heating load during the winter by reducing window conductive heat loss at night and leaving the window unshaded during the day to maximize solar gain. MeetDaylightIlluminanceSetpoint: Used only with ShadingType = SwitchableGlazing in zones with daylighting controls. Note: Unlike other Shading Control Types, glare control is active whether or not a schedule is specified. ![]() ![]() Applicable only to windows in zones with daylighting. OnIfHighGlare: Shading is on if the total daylight glare index at the zone’s first daylighting reference point from all of the exterior windows in the zone exceeds the maximum glare index specified in the daylighting input for zone (ref: Group – Daylighting). OnIfHighZoneCooling: Shading is on if zone cooling rate in the previous timestep exceeds SetPoint (W) and schedule, if specified, allows shading. OnIfHighZoneAirTemperature: Shading is on if zone air temperature in the previous timestep exceeds SetPoint (C) and schedule, if specified, allows shading. OnIfHighOutdoorAirTemperature: Shading is on if outside air temperature exceeds SetPoint (C) and schedule, if specified, allows shading. OnIfHighHorizontalSolar: Shading is on if total (beam plus diffuse) horizontal solar irradiance exceeds SetPoint (W/m 2) and schedule, if specified, allows shading. OnIfHighSolarOnWindow: Shading is on if beam plus diffuse solar radiation incident on the window exceeds SetPoint (W/m 2) and schedule, if specified, allows shading. Note: For exterior window screens AlwaysOn, AlwaysOff, and OnIfScheduleAllows are the only valid shading control types. Requires that Schedule Name be specified and Shading Control Is Scheduled = Yes. OnIfScheduleAllows: Shading is on if schedule value is non-zero.
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