CircadiaOSShort answer: in the Mysa app, add scheduled changes for the bedroom thermostat: cool it down before bed, lowest in the first half of the night, a degree or two warmer later, and warmest before you wake. For baseboard heaters, schedule changes about 30 minutes early. For in-floor heat, schedule them one to two hours early, because the floor takes a long time to warm or cool.
Why Mysa is a good fit for a sleep schedule
Most central thermostats control the whole house from a hallway. Mysa is usually installed one per room, on the heater that serves that room. That means your bedroom can follow a sleep curve while the living room stays on its own schedule, and the thermostat measures the room you actually sleep in.
Timing depends on your heat type
| Heat type | How fast it responds | What to do |
|---|---|---|
| Electric baseboard | Fairly quick to heat, slow to cool (the room cools by losing heat, not by active cooling) | Schedule each change about 30 minutes before you want it. Lower setpoints only stop the heater; the room cools at its own pace. |
| In-floor (radiant) | Slow in both directions; the floor stores heat | Schedule changes one to two hours early. Keep the overnight swing small, 1–3°F, or it will not reach the target in time. |
| Mini-split / AC | Fast, and can actively cool | Schedule changes 15–30 minutes early. This is the easiest type for a full four-phase curve. |
A four-phase schedule to start with
Assuming bed at 10:30 p.m. and up at 6:30 a.m., with a baseboard heater:
- 10:00 p.m., pre-sleep: 66–67°F, so the room is already cooling when you get in.
- 10:30 p.m., early night: 64–65°F, the coolest part of the night, when deep sleep is concentrated.
- 2:00 a.m., late night: 65–66°F, a slight rise so you do not wake cold.
- 5:00 a.m., pre-wake: 67–68°F, warm before the alarm.
These are starting points based on the 60–67°F range most sleep guidance suggests. Adjust one phase at a time and give each change a week. The four-phase approach explained.
How to add it in the Mysa app
- Open the Mysa app and choose the bedroom thermostat.
- Open its schedule and pick the days you want to edit.
- Add a scheduled temperature change for each of the four phases above.
- Copy the schedule to the rest of the week, and shift weekend times if you sleep later.
Menu names change between app versions. If you cannot find an option, check Mysa's help center.
Where manual schedules fall short
A schedule set by clock time does not move when your bedtime does, and testing whether 64°F or 65°F works better for the first half of the night means changing it by hand, remembering what you changed, and comparing how you slept.
Where CircadiaOS fits
CircadiaOS is an iPhone app that sends a four-phase overnight schedule to a smart thermostat each evening, timed to the sleep window you set, and on Premium adjusts one phase at a time from your wearable's sleep data. Mysa is on the in-app thermostat list and connects through Apple Home, so your Mysa needs to be added to the Home app on your iPhone. Check the connection screen in the app for the current status before you rely on it. CircadiaOS also works with Nest, ecobee, Honeywell Home and 20+ more brands. Full compatibility list.
Questions
Does Mysa have a sleep mode?
Mysa uses schedules rather than a dedicated sleep mode. You can add several scheduled temperature changes overnight to build a sleep curve for the bedroom.
What temperature should I set Mysa to at night?
A good start is about 64–65°F for the first half of the night, rising to 67–68°F before you wake. With in-floor heat, keep the swing smaller and schedule changes one to two hours early.
Why doesn't my in-floor heat reach the night temperature in time?
A heated floor stores a lot of heat and releases it slowly. Schedule overnight changes one to two hours before you want them, and keep the difference between phases to a few degrees.
Does CircadiaOS work with Mysa?
Mysa is on CircadiaOS's thermostat list and connects through Apple Home. Check the connection screen in the app for current availability, and see the compatibility page.
Sources
- Mysa Help Center, scheduling articles (getmysa.com).
- U.S. Department of Energy, Energy Saver: "Electric Resistance Heating" and "Radiant Heating" (energy.gov).
- Harding EC, Franks NP, Wisden W. The temperature dependence of sleep. Frontiers in Neuroscience, 2019.
- National Sleep Foundation, "Sleep tips" (thensf.org/sleep-tips).
- Cleveland Clinic, "What's the best temperature for sleep?" (health.clevelandclinic.org).
Related guides
- Smart thermostat sleep schedule — the four phases for any brand.
- Best smart thermostat for sleep — what to look for.
- Summer and winter settings — seasonal numbers.
- ecobee sleep mode · Honeywell · Nest · Sensi