The HVAC Smart Relay Switch (HSRS) is an energy saving device designed to automatically shut off air conditioning or heating when a monitored door or window remains open for a preset period of time. Available in both wired & wireless packages, the system uses compatible door/window sensors (two included). The HSRS is fully configurable using onboard DIP switches, allowing you to establish specific operational parameters. For instance, configure the device to temporarily disable the air conditioning or heating system when any door or window has remained open for 10 minutes and then re-enable when the door has remained closed for 1 minute. (Requires installation by a qualified hvac technician.)



  • Automatically shuts off air conditioning or heating when a monitored door or window remains open too long
  • Accepts wired and/or wireless sensors types
  • Configurable delay period using onboard DIP switches, up to 10 hours
  • Expandable (accepts up to 4 wired zones and/or 8 wireless sensors)
  • Ideal for split (central) a/c systems
  • Compatible with most existing thermostats

(Note: Installation by a qualified hvac technician is recommended.)


What’s Included:

  • HSRS controller with mounting flange
  • Two (2) door/window sensors
  • Power converter (24 vac)
  • Integrated RF receiver (wireless systems only)
  • Antenna + mounting bracket (wireless systems only)
  • Coaxial cabling (wireless systems only)


  • Though installation is not difficult, a qualified HVAC technician is recommended.
  • System includes two (2) door/window sensors. (Additional sensors sold separately.)
  • Wireless sensors require two AAA batteries.


Video Tutorials:


Additional Info:




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Weight 3 lbs
Door/window sensor

Wired, Wireless

For HVAC system

Split (ducted), Mini-split (ductless), Fan coil, PTAC, Window unit, Other (pls contact us)

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