Smart thermostat vs programmable thermostat: is the upgrade worth it?
Updated
A programmable thermostat follows a fixed schedule for $25–$60. A smart one adds Wi-Fi, learning, away detection and sensors for $80–$280. See which one fits your routine, wiring and budget.
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Which one should you pick?
A smart thermostat adjusts from your phone, can detect when you are away, and can learn or follow your routine.
A programmable thermostat saves the same degrees at the same hours for $25–$60, with no Wi-Fi or app.
ENERGY STAR certified smart thermostats are designed to work with some utility programs; programmable models are not part of the ENERGY STAR program.
Many programmable models run on batteries and need no C-wire; check the lease before swapping either type.
Either type must support heat pumps and auxiliary heat; smart models with room sensors help, but a basic heat-pump programmable can be enough.
Smart thermostat vs Programmable thermostat
| What changes | Smart thermostat | Programmable thermostat |
|---|---|---|
| Typical price | $80–$280 | $25–$60 |
| How it saves | Schedules plus away detection, learning and remote changes; ENERGY STAR reports an average of 8% on heating and cooling, about $50 a year | A fixed weekly schedule; DOE says up to 10% a year from a 7–10°F setback for 8 hours a day when the schedule is actually used |
| ENERGY STAR status | Certified models exist (spec effective Jan. 1, 2017) | The program suspended its programmable thermostat specification at the end of 2009 over questions about net savings |
| Wi-Fi and app | Yes: remote control, alerts, energy reports | No, or a limited feature set |
| Learning and presence detection | Often: learns your routine, uses your phone or built-in sensors to detect when you are away | No: it follows the program you enter |
| Remote room sensors | Available on many models, to read a bedroom or a cold room | Rare |
| Power and wiring | Usually wants a C-wire, power adapter or battery assist; see the wiring guide | Often runs on batteries and needs no C-wire |
| Utility rebates and demand response | Often eligible; ask your utility | Rarely eligible |
| Ease of use | App and touchscreen; more menus, more to set up | Buttons and a small screen; schedule entered by hand |
| Cybersecurity and data | Needs an account, firmware updates and a strong password | No network connection, no data sharing |
The savings come from the schedule, not the label
Both types save energy the same way: by lowering the temperature when you do not need it. The Department of Energy says you can save as much as 10% a year on heating and cooling by turning the thermostat back 7–10°F for 8 hours a day. A programmable thermostat can do that on a fixed program. A smart thermostat can do it with a changing schedule, and it can adjust when you leave unexpectedly. ENERGY STAR reports that homes with certified smart thermostats save on average 8% on heating and cooling costs, about $50 a year, based on field data.
So the upgrade pays when the cheaper thermostat would not be used well. If you program a $40 thermostat once and keep the schedule, a smart model adds little on energy. If the schedule is wrong half the time, you override it and forget to change it back, a smart model with away detection can recover that savings. Estimate your own with the smart thermostat savings calculator.
When a smart thermostat is the better choice
- Your household schedule varies: shift work, travel, kids’ activities.
- You want to check or change the temperature away from home, or get an alert if the house gets too cold.
- One room is always off from the rest, and a remote sensor would help.
- Your utility offers a rebate or a demand response credit for a certified smart thermostat. See smart thermostat rebates and utility programs.
- You use a smart home system and want the thermostat in your routines.
Check the wiring first: a smart model usually needs a C-wire or an adapter, which adds $20–$40 or a service call. See smart thermostat without a C-wire.
When a programmable thermostat is enough
- Your routine is steady, and you will program it once and keep it.
- The budget is $25–$60 and a payback of a few months matters.
- You prefer no Wi-Fi, no app, and no cloud account.
- You rent a home with an older system and want a simple swap that can be reversed at move-out.
Pick a model for your system: heat pumps, electric baseboard, millivolt and multi-stage systems each need a matching model. The Department of Energy says electric resistance heating requires thermostats that control 120-volt or 240-volt circuits, and that heat pumps generally do not suit setbacks on a standard programmable thermostat. See thermostat settings that save money for a schedule.
A middle path
You do not have to choose permanently. Start with a programmable model, follow the schedule for a season, and upgrade if you keep overriding it. If you already own a smart thermostat, the most reliable use of it is a plain schedule with away detection turned on.
Shop by need
Changing schedule, remote control, rebates
What to look for: ENERGY STAR certification, away detection, remote sensor support, a compatibility check for your wiring
Typical price: $80–$280
See options on AmazonFixed routine, low budget
What to look for: 7-day programmable schedule, battery power with no C-wire, correct system type, clear display and hold button
Typical price: $25–$60
See options on AmazonHeat pump, simple schedule
What to look for: heat pump programmable model with auxiliary heat control, O/B terminal support, recovery or smart-start feature
Typical price: $40–$120
See options on AmazonFrequently asked questions
Is a smart thermostat worth it over a programmable one?
It is when your schedule changes, when you want remote control or room sensors, or when a utility rebate narrows the price gap. If you will set a schedule once and keep it, a programmable thermostat captures most of the same savings for less.
Do programmable thermostats save as much as smart ones?
They can, because the savings come from the setback. DOE says up to 10% a year for a 7–10°F setback for 8 hours a day. A smart thermostat helps when you would not keep the schedule.
Does a smart thermostat need a C-wire?
Most want one, or a power adapter. Some models use power stealing or batteries. Many programmable thermostats run on batteries and do not need a C-wire.
Are programmable thermostats ENERGY STAR certified?
Not under the current program. ENERGY STAR suspended its programmable thermostat specification at the end of 2009, citing questions about net energy savings, and certifies smart thermostats instead.