Setting your thermostat for winter is a 15- to 30-minute DIY job if the wiring is already in place, and the main payoff is simple: 68°F when you’re home and a 5°F to 10°F setback when you’re away or asleep usually cuts waste without making the house feel abandoned.
A smart thermostat can do the hard part for you, but only if the schedule and recovery settings match how you actually live. The wrong defaults turn into extra runtime, cold mornings, and a bill that looks like it got into the freezer and stayed there.
The useful number here is 68°F. A 1,500 W electric heater running 8 hours uses 12 kWh, so even small hours of extra runtime add up fast; a furnace or heat pump saves in the same way when you stop asking it to hold unnecessary temperature all day.
The essentials
Use 68°F as the starting point for occupied hours, then drop the setpoint by 5°F to 10°F when you sleep or leave for the day.
Heat pumps usually need smaller setbacks than furnaces; a 3°F to 4°F drop is often the safer move because backup heat can erase the savings.
Do not crank the thermostat to 80°F to warm the house faster; the system still heats at its own rate, and you only make it run longer.
If your thermostat has emergency heat, use it only when the heat pump cannot keep up or the outdoor unit is off; it is usually the expensive setting in the room.
Place the thermostat away from supply vents, lamps, direct sun, and drafty hallways, or it will make bad decisions with perfect confidence.
Smart Thermostat Settings for Maximum Heating Efficiency
Set your thermostat to 68°F when you’re home and awake, then drop it 5°F to 10°F while you’re asleep or away. That setback cuts the time your furnace runs without making the house feel cold when you walk back in, and setup takes 15 to 30 minutes if the wiring is already in place.
The starting point is a range because homes differ. A well-insulated house in Virginia holds heat longer than a drafty one in Minnesota, so the first can handle a deeper setback. Heat pumps lose efficiency when they work too hard to catch up, so a smaller 3°F to 4°F setback keeps them from switching to costly backup heat. A gas or oil furnace recovers faster and tolerates a 10°F drop without much penalty.
Your occupied temperature depends on what feels comfortable and how much you’ll wear indoors. The Department of Energy suggests 68°F as a balance between savings and comfort for most people during waking hours in winter. Some prefer 70°F; others are fine at 66°F in a sweater. Each degree you raise the thermostat adds about 3% to your heating bill over the season, so the difference between 68°F and 72°F is roughly 12%.
Sleep and away setbacks matter because heating an empty house or a bedroom under blankets wastes fuel. Dropping to 60°F to 63°F overnight or during an eight-hour workday saves 5% to 15% on heating costs compared to holding 68°F around the clock, depending on climate and how fast the house cools. The house warms back up in 20 to 40 minutes with adaptive recovery, a feature that starts the system early so the target temperature arrives when you do.
1
Check your system type
Look at the thermostat or the furnace label to confirm whether you have a furnace, boiler, or heat pump. Heat pumps need gentler setbacks to avoid triggering auxiliary heat.
2
Set the occupied temperature
Program 68°F for the hours you’re home and awake. Adjust up or down one or two degrees after a few days if the house feels too cold or too warm.
3
Set the away and sleep setbacks
Drop the target to 58°F to 63°F when you’re out or asleep. Use a 3°F to 4°F setback if you have a heat pump; a furnace or boiler can handle 7°F to 10°F.
4
Turn on adaptive recovery
Enable the feature in the thermostat’s schedule menu so the system starts early and hits your target temperature at the programmed time, not 30 minutes late.
5
Test for two days
Let the schedule run and check whether the house feels comfortable when you wake up and when you get home. Adjust the setback or recovery time if the temperature is off.
Most homes use low-voltage thermostats that run on 24 volts from a transformer in the furnace or air handler. If you’re swapping an old thermostat for a smart one, the job is DIY as long as the wiring is labeled and you follow the installation guide. Line-voltage thermostats, common with baseboard heaters and some wall units, carry 120 V or 240 V and need different hardware and more caution.
Shut off power before touching wires
Turn off the breaker for the heating system before removing the old thermostat. Low-voltage wiring won’t shock you badly, but a crossed wire can fry the control board in the furnace. If you see thick wires or aren’t sure which breaker controls the system, call an electrician.
What you’ll need for a thermostat swap
Screwdriver, usually Phillips
Smartphone or tablet for app setup and WiFi pairing
Masking tape or wire labels to mark each wire before disconnecting
The new thermostat kit with mounting plate and trim ring
Smartphone camera to photograph the old wiring as a reference
Smart thermostats add scheduling, remote control, and energy tracking that basic models lack. Most need a C wire to power the screen and WiFi radio. If your old thermostat used only four wires and there’s no spare in the wall, some models include a workaround adapter that pulls power from another terminal without running a new wire.
For most single-stage systems
ecobee Smart Thermostat Essential
The ecobee Essential works with forced-air furnaces, heat pumps, and boilers that use low-voltage control wiring. It includes a Power Extender Kit option if you don’t have a C wire, and the app tracks energy use by day so you can see whether your setbacks are actually cutting runtime. It won’t control multi-stage or modulating systems without extra wiring.
This is a DIY job when you’re replacing an existing low-voltage thermostat on a system that’s working correctly and the wires are cleanly labeled R, W, Y, G, and C or similar. If the old thermostat has thick wires screwed into the back, if there’s no transformer near the furnace, or if you’re installing the first thermostat on a new system, that crosses into HVAC wiring that most jurisdictions require a licensed technician to handle.
The short version
Start with 68°F while you’re home, then set a 5°F to 10°F setback for sleep and away periods. Heat pumps need a gentler 3°F to 4°F drop to stay efficient.
How To Set A Heating Schedule That Saves Energy
Building a heating schedule starts with four points in your day: wake, away, home, and sleep. Set wake to 68°F starting about 30 minutes before you get up, away to 60°F when the house is empty, home back to 68°F half an hour before anyone returns, and sleep to 62°F. Those targets work for most people, but the times need to match your actual routine, not a template.
Weekends often need their own schedule. A family that leaves at 7 a.m. on Tuesday but sleeps until 9 on Saturday wastes heat if both days follow the same wake time. Most thermostats let you copy the weekday schedule and shift the times, or build a separate weekend program from scratch.
1
Program the weekday schedule
Enter wake, away, home, and sleep times with their target temperatures. Check that away and sleep setbacks are 5°F to 10°F lower than the occupied settings.
2
Adjust for weekends
Copy the weekday schedule if your routine is similar, or create a new one if wake and away times shift by more than an hour.
3
Set the away schedule for trips
Use vacation or away mode to hold the house at 55°F to 60°F when you’ll be gone for more than two days. This prevents frozen pipes without heating empty rooms to 68°F.
A typical Wednesday
Say your family wakes at 6:30 a.m., leaves at 8, comes home at 5 p.m., and goes to bed at 10:30. The thermostat heats to 68°F at 6 a.m., drops to 60°F at 8, climbs back to 68°F at 4:30 p.m., then falls to 62°F at 10:30. That’s 16 hours a day at reduced temperatures. Over eight hours of sleep and eight hours away, the furnace runs roughly 30% less than it would holding 68°F around the clock.
Wake68°F at 6 a.m.
Away60°F at 8 a.m.
Home68°F at 4:30 p.m.
Sleep62°F at 10:30 p.m.
Temporary hold keeps an override temperature until the next scheduled transition; permanent hold cancels the schedule entirely until you manually resume it. Use temporary hold for a sick day when you’re home unexpectedly, or when you’ll arrive two hours late and don’t want the house heating at the usual time. Permanent hold makes sense only when your routine has changed for good—a new shift at work, a semester off—because leaving it on turns your smart thermostat into an expensive manual dial.
Geofencing and room sensors
Geofencing triggers heating when your phone nears home, which helps if your arrival time swings unpredictably. Room sensors let the thermostat follow the temperature where you actually sit instead of the hallway where it’s mounted. Both features work only when occupancy really follows the phone or the room being watched. Pets crossing a motion sensor or a phone left at home will heat an empty house.
Manual overrides should expire. Holding 72°F for one cold evening is fine; forgetting to cancel it wastes energy for weeks. Check the display after you’ve bumped the temperature up to confirm whether the hold is temporary or permanent, and set an end time if the thermostat offers one.
Emergency Heat Setting On Thermostat
Emergency heat on a heat pump thermostat switches you over to the backup heating element or furnace and turns off the outdoor unit completely. It’s not a comfort boost—it’s a fail-safe for when the heat pump can’t run. Running emergency heat costs about two to three times more per hour than normal heat-pump operation, because resistance strips or a secondary furnace do all the work without the efficiency gain of moving heat from outside air.
Use emergency heat when the outdoor unit is visibly iced over and won’t defrost, when the heat pump has stopped responding, or when a technician tells you to flip the switch while they order a part. Some thermostats label the mode Em Heat or Emergency; others hide it under system settings. Nest and Ecobee models let you override the schedule by holding the target temperature up or down, but that still runs the heat pump unless you manually switch to auxiliary-only mode in the equipment menu.
Gas furnaces with a basic thermostat don’t usually have an emergency heat mode the way a dual-fuel or all-electric heat pump does. Overriding the schedule on a gas system means turning the dial or tapping the app to a higher set point, which calls for heat outside the programmed times. Hold modes and temporary overrides work the same way across brands: the furnace runs until the new target is met, then goes back to the schedule or stays at the override temperature until you cancel it.
Don’t leave it on
Emergency heat left running all night or all winter can double your heating bill, because you’re paying for straight resistance heat instead of heat-pump efficiency. Flip it back to normal heat as soon as the outdoor unit thaws or the repair is done.
Myth
Auxiliary heat and emergency heat are the same thing
Fact
Auxiliary heat kicks in automatically for short bursts when the heat pump needs help on cold mornings; emergency heat is a manual override that shuts the heat pump off entirely. Seeing Aux flash for 10 or 20 minutes is normal. Seeing it stay on for hours means the heat pump isn’t keeping up and should be checked by a tech.
In short
Emergency heat is backup-only and costs two to three times more to run. Use it when the outdoor unit fails or a technician says to, then switch back as soon as the problem is fixed.
From HeaterGuides · our own guidePage 7 is a thermostat schedule that saves without leaving you cold.Winter Heating Bill CutterSee what every heater in your home really costs, heat the rooms you use, and cut the waste in 30 days.Cost-per-hour tables for every heaterThermostat schedule and draft-proofing planRunning-cost and bill calculator (Excel)$14.99$9.99Get it for $9.99See what's inside and watch the 2-minute video →14-page printable PDF + Excel calculator · instant download · 30-day refund
Common Thermostat Mistakes That Waste Heat
Cranking your thermostat to 80°F won’t warm the house any faster than setting it to 68°F. Furnaces and heat pumps run at one speed until the target is reached, so an aggressive setpoint just means the system runs longer and overshoots, wasting energy and leaving you too warm.
Myth
Bigger setbacks always save more money
Fact
Dropping your thermostat 15°F or 20°F overnight can save energy in a gas furnace, but heat pumps often burn through those savings during the recovery period when backup heat kicks in. A 5°F to 10°F setback usually hits the sweet spot: enough savings to matter, short enough recovery to avoid expensive auxiliary heat.
Myth
The thermostat reads the whole house
Fact
Your thermostat only knows the temperature where it sits. Mount it near a sunny window, a drafty hallway, a heat register, or a table lamp, and it’ll call for heat or shut off based on a lie. Short cycling, cold bedrooms, and uneven heating often start with bad placement, not bad settings.
Kitchens bias the reading high when you’re cooking. Hallways near exterior doors read cold. Direct sunlight on the thermostat convinces it the house is warmer than it is, so the furnace shuts off early and distant rooms stay cold. Heat registers right below the sensor do the opposite: hot air rising past the thermostat makes it think the job is done.
Cold setbacks and moisture
Setting your home below 55°F for days at a time in winter raises the risk of frozen pipes in uninsulated walls and condensation damage in humid climates. Vacation mode should hold at least 55°F unless you’ve drained the plumbing.
Manual overrides pile up waste when you forget to switch back. Each time you bump the temp up for an hour and leave it there, the schedule stops working. Heat pumps suffer more from constant tweaking: frequent temperature swings force the system into less-efficient operating ranges and wear out components faster.
When the problem isn’t the thermostat
Dirty filters, leaky ducts, and undersized equipment make any schedule look bad. If one room stays cold no matter what you set, or the furnace runs nonstop on a mild day, check the filter and ductwork before blaming the programming. Smart thermostats can optimize a working system; they can’t fix one that’s broken.
When To Call A Licensed Pro Or Get A Permit
Swapping a low-voltage thermostat is usually DIY: you match the wire labels, mount the new unit, and turn the power back on. Line-voltage thermostats that control baseboard heat or a boiler, any wiring that touches a gas appliance, and new cable runs from the panel cross into work that most jurisdictions require a licensed electrician or HVAC tech to handle.
Permits come into play when you’re running new wire, opening the breaker panel, or replacing equipment. Local code varies, but inspectors care about anything that could start a fire or leak gas. Your city or county building department website lists what needs a permit; many allow low-voltage thermostat replacement without one, but not new circuits or panel upgrades.
Utility companies and landlords sometimes lock thermostat settings remotely during peak demand or as part of a lease. If your schedule keeps reverting or the screen shows a padlock icon, the fix is a phone call to your utility or property manager, not a new thermostat. How smart thermostats boost heating energy efficiency depends on control, and you might not have it.
Learning features still need correct setup
Smart thermostats learn your patterns and preheat before you wake or arrive home, but they start from the schedule and setpoints you give them. Learning refines timing; it doesn’t fix a baseline that’s too hot, too cold, or missing entirely.
Stop and call a pro when you see
Wire labels you don’t recognize or wires with no label at all
A tripped breaker after connecting the thermostat
No heat or cooling after setup, even with fresh batteries and a system reset
A thermostat that reboots every few minutes or shows error codes you can’t clear
More Questions, Answered
What is the best thermostat setting for winter nights?
Set your thermostat to 60°F to 63°F at night if you sleep comfortably under blankets; each degree below 68°F saves roughly 1% on heating costs over the billing period. If you wake up cold or have very young children or elderly household members, 65°F to 66°F is a safer floor. Most smart thermostats let you program this setback to start 30 minutes before bed and end 30 minutes before you wake.
How do I override my smart thermostat without breaking the schedule?
Tap the target temperature on the display or in the app and adjust it manually; the thermostat will hold that setting until the next scheduled transition, then resume the programmed routine. If you want the override to last indefinitely, look for a hold or permanent hold option in the menu. Temporary adjustments do not erase or disable the schedule you built.
Should I use emergency heat on my heat pump all the time?
No. Emergency heat forces the system to rely on electric resistance strips or a backup furnace, which costs two to three times as much to run as the heat pump’s compressor in most climates. Use it only when the outdoor unit has failed, refrigerant is leaking, or the compressor cannot keep up during an ice storm. Switch back to normal heat as soon as the system is repaired or the weather moderates.
Why does my thermostat say heat but the house still feels cold?
The thermostat is calling for heat, but the furnace or heat pump may not be delivering it because of a tripped breaker, a clogged filter choking airflow, a flame sensor that won’t let the burner stay lit, or low refrigerant in a heat pump. Check the breaker panel and the filter first; if both are fine and no warm air comes from the vents after five minutes, the heating system needs a service call.
Do I need a licensed electrician to replace a smart thermostat?
Most thermostat swaps are low-voltage wiring—24 V controlled by labels like R, W, Y, G and C—and do not require a permit or an electrician in most jurisdictions. If your new thermostat needs a C wire and you have to add one by running new cable from the furnace, or if you are replacing line-voltage baseboard thermostats that switch 120 V or 240 V directly, hire a licensed electrician. When in doubt, check your local building department before you start.
Before you go · a welcome giftGet the Winter Heating Bill Cutter for $4.99See what every heater in your home really costs, heat the rooms you use, and cut the waste in 30 days. Normally $14.99; your welcome price saves $10.00. We'll email your link right now.or skip the email and buy it now for $4.99 →One email with your link now. We never share your address.
Winter Heating Bill CutterSee what every heater in your home really costs, heat the rooms you use, and cut the waste in 30 days.Cost-per-hour tables for every heaterThermostat schedule and draft-proofing planRunning-cost and bill calculator (Excel)
