{"schemaVersion":1,"slug":"switchroom-high-temperature-ventilation-demand","name":"Switchroom high-temperature ventilation demand","kind":"symbol","abbreviation":"SHVD","aliases":["Switchroom ventilation interfaces","switchrooms Switchroom ventilation interfaces","switchrooms","Switchrooms","Room temperature","Ventilation demand"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Generates a ventilation request from the monitored room-temperature condition.","description":["Generates a ventilation request from the monitored room-temperature condition. Ventilation control coordinates the equipment that manages heat and air movement in an electrical room. A temperature request, a fan command and proof of airflow are separate signals, and the room design determines how they interact.","In a switchroom containing transformers and auxiliary panels, the room controller can supervise fan availability and send an alarm when the documented ventilation duty is not achieved. For this reference, the drawing identifies “Room temperature” at the input and “Ventilation demand” at the output. Thresholds belong to the thermal design.","Identify the monitored space, the selected ventilation mode and the equipment feedback. Avoid inferring airflow, temperature limits or a fire response from a generic fan symbol; these require the room-services design. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: Room temperature. Identify its source device or document and the state represented on the drawing.","Follow the named output: Ventilation demand. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Thresholds belong to the thermal design.","Identify the monitored space, the selected ventilation mode and the equipment feedback. Avoid inferring airflow, temperature limits or a fire response from a generic fan symbol; these require the room-services design."],"drawingChecklist":["Label the source and connection reference for room temperature.","Identify the destination and defined state of ventilation demand.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Thresholds belong to the thermal design."],"distinction":"Thresholds belong to the thermal design. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Switchrooms"},{"label":"Input / boundary","value":"Room temperature"},{"label":"Output / connection","value":"Ventilation demand"},{"label":"Lookup label","value":"SHVD is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-ventilation","relevance":"Public technical context for switchroom ventilation interfaces. Heat removal, condensation and environmental design context. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["ga-switchroom-exhaust-fan","ga-enclosure-thermostat","switchroom-low-temperature-ventilation-restraint"],"artwork":"pi26-switchroom-high-temperature-ventilation-demand","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchrooms","family":"ventilation","input":"Room temperature","output":"Ventilation demand"},"plainEnglish":{"title":"What this block does","introduction":"Generates a ventilation request from the monitored room-temperature condition.","example":"In a switchroom containing transformers and auxiliary panels, the room controller can supervise fan availability and send an alarm when the documented ventilation duty is not achieved. For this reference, the drawing identifies “Room temperature” at the input and “Ventilation demand” at the output. Thresholds belong to the thermal design.","drawings":"Start at the named input: Room temperature. Identify its source device or document and the state represented on the drawing. Follow the named output: Ventilation demand. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Room temperature"},{"name":"Output","meaning":"Ventilation demand"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["Room temperature","SHVD","Ventilation demand"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Ventilation in MV substations","url":"https://www.electrical-installation.org/enwiki/Ventilation_in_MV_Substations"}],"profileId":"power-installation-ventilation"},"url":"https://eloragrid.ai/symbols/switchroom-high-temperature-ventilation-demand","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/switchroom-high-temperature-ventilation-demand.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-ventilation","publisher":"Schneider Electric","title":"Ventilation in MV substations","url":"https://www.electrical-installation.org/enwiki/Ventilation_in_MV_Substations","scope":"Heat removal, condensation and environmental design context.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for switchroom ventilation interfaces. Heat removal, condensation and environmental design context. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}