Get Pricing
Back to product page

How does the open window function on my Smart Thermostat work?

1 min read · Updated Dec 2025
7iE Smart Matter Thermostat 6iE Smart Thermostat Terra WiFi Thermostat 4iE Smart WiFi Thermostat

The open window function is a setting on your thermostat that will detect when a nearby window is open, letting in outside air and will adjust the temperature accordingly.

 

TRIGGER ON:

  • A Windows open event is triggered by a 5°C drop in temperature within any 15-minute period.
  • When a Windows open event is detected, then the thermostat will go to frost protection mode and show the window icon.

TRIGGER OFF:

  • A Windows open event will be terminated by a temperature change when any 1-minute period is ≥ 32°F, the user presses any button, or there is a 30-minute time-out from the event trigger.
  • When a Windows open event is terminated, then the thermostat will return to priority run mode (this means that any override that was active at the start of the Windows open event will be lost) and will remove window icon.

Curious on how to set the window detection on your Terra Smart Thermostat? See the video below:

Subscribe to our YouTube channel here.

Quoting Tools: instant, accurate, flexible

Warmup offers an extensive range of electric floor systems compatible with all floor types, rooms and projects.

ⓘ Enter your first name.
ⓘ Enter your last name.
ⓘ Enter your phone number.
ⓘ Enter your postal code.
ⓘ Please enter a valid email address.
ⓘ Select at least one option.
Select a file or move here
Scroll to Top