--- title: "HVAC: How Does eSPACE Calculate my HVAC Schedules?" description: "facilitespace, HVAC integration, when does my air start and stop, when does eSPACE turn off and on my air\n\n\nOnce an event is in APPROVED status in Event Scheduler, your HVAC will automatically engage and disengage using the Set-up/Tear-down times on the event + ramp time in FACILITeSPACE. \n\nHowever, if the event does not have a setup and end teardown time, then eSPACE will use the start time/end time of the event plus ramp time in FACILITeSPACE.\n\nHVAC Overrides\nThe only EXCEPTION is if you have Override times entered on the event details page (see example below). They will be looked at instead of the event start/end time or the event setup/end teardown times. \n\nFor example, if you have an approved event with a Setup time at 6:30 AM but the actual event Start time is not until 3 PM, you may not want the HVAC engaging at 6:30 AM. So, you can choose an override time that would start the HVAC at Noon to start cooling the space prior to the event start time.\n\nYou also have the option here to TURN OFF the HVAC for the event, which will prevent eSPACE from scheduling air for that event. Simply toggle on \"TURN OFF HVAC FOR THIS EVENT\"." --- [Skip to content](https://support.espace.cool/espace-knowledge-base/hvac-how-does-espace-calculate-my-hvac-schedules#main-content) English Show submenu for translations [![66f7bec9bf5a8d3c374018fc](https://support.espace.cool/hs-fs/hubfs/AI%20Email%20Template%20Import/Images/66f7bec9bf5a8d3c374018fc.png?width=953&height=300&name=66f7bec9bf5a8d3c374018fc.png)](https://www.smartchurchsolutions.com/) - [Knowledge Base](https://support.espace.cool/espace-knowledge-base) - [Product Feedback](https://u03m6.share.hsforms.com/2EgdDdILgTLGc3McfPhw1uw) Open main navigation Close main navigation - [Knowledge Base](https://support.espace.cool/espace-knowledge-base) - [Product Feedback](https://u03m6.share.hsforms.com/2EgdDdILgTLGc3McfPhw1uw) - English Show submenu for translations eSPACE Support Center: How can we help you? - There are no suggestions because the search field is empty. 1. 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[HVAC](https://support.espace.cool/espace-knowledge-base/integrations?hsLang=en#hvac) # HVAC: How Does eSPACE Calculate my HVAC Schedules? ## How does eSPACE know when to turn on and off air for an event   ![](https://support.espace.cool/hs-fs/hubfs/undefined-Feb-18-2026-08-21-40-4845-PM.png?width=670&height=377&name=undefined-Feb-18-2026-08-21-40-4845-PM.png) Once an event is in APPROVED status in Event Scheduler, your HVAC will automatically engage and disengage using the Set-up/Tear-down times on the event + ramp time in FACILITeSPACE*.*  However, if the event does not have a setup and end teardown time, then eSPACE will use the start time/end time of the event plus ramp time in FACILITeSPACE*.* ![](https://support.espace.cool/hs-fs/hubfs/image-png-Feb-18-2026-08-22-44-8986-PM.png?width=670&height=147&name=image-png-Feb-18-2026-08-22-44-8986-PM.png) **HVAC Overrides** The only EXCEPTION is if you have Override times entered on the event details page (see example below). They will be looked at instead of the event start/end time or the event setup/end teardown times.  - For example, if you have an approved event with a Setup time at 6:30 AM but the actual event Start time is not until 3 PM, you may not want the HVAC engaging at 6:30 AM. So, you can choose an override time that would start the HVAC at Noon to start cooling the space prior to the event start time. ![](https://support.espace.cool/hs-fs/hubfs/image-png-Feb-18-2026-08-26-20-6487-PM.png?width=526&height=307&name=image-png-Feb-18-2026-08-26-20-6487-PM.png) You also have the option here to TURN OFF the HVAC for the event, which will prevent eSPACE from scheduling air for that event. 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