Guide to Smart Thermostats for Electric Heating in 2026
Choose a smart thermostat for electric baseboards, convectors and radiant heat with practical guidance on wiring, load limits and home control.
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Prices and availability are accurate as of the time of publication and are subject to change.
Mysa Baseboard V2 is the best smart thermostat for electric heating for most compatible homes because it combines line-voltage control, a broad 120V and 240V range, and the mainstream smart-home platforms people already use. This guide to smart thermostats for electric heating explains where that recommendation fits and when Sinopé or Stelpro is the more sensible buy.
Smart thermostats for electric heating: start with the circuit
Electric baseboards, wall convectors and radiant ceilings normally use line voltage. That is fundamentally different from the 24V control wiring used by many furnaces and central HVAC systems. The useful first question is not whether a thermostat works with a voice assistant. It is whether it is designed for your heater type, voltage and wiring arrangement. A compatible model must also be rated for the combined load on that thermostat, not simply for the wattage of one visible heater.
Mysa specifies high-voltage electric baseboards, fan-forced heaters, convectors and radiant ceiling heating for its V2 model. It works at 120V or 240V, has a maximum stated load of 1900W at 120V or 3800W at 240V, and needs a four-wire arrangement including a neutral or second live wire. Those details make it a strong general choice, but they also rule it out for older two-wire installations. Do not treat a missing conductor as a minor installation inconvenience.
Sinopé's TH1123WF is deliberately focused on electric heat. The manufacturer lists electric baseboards, convectors, fan-forced convectors and radiant ceilings, with two- or four-wire compatibility and a 3000W maximum load. Its 2.4GHz Wi-Fi connection, scheduling and geofencing make it particularly compelling for someone who wants app control without building a separate home-automation network. The 3000W ceiling is the specification to calculate carefully if one control point serves a long baseboard run.
Stelpro's KI is a different proposition. It is a line-voltage thermostat for electric baseboards and convectors that communicates through Z-Wave Plus rather than Wi-Fi. That is valuable when a home already has a reliable Z-Wave hub and rules, but it is not a stand-alone app-first product. Think of it as a device for a planned automation system, not a shortcut around choosing a hub.
| Product | Best for | Price |
|---|---|---|
| Mysa Baseboard V2 | Best overall: broad mainstream smart-home support | View |
| Sinopé TH1123WF | Best for quiet control: 2- or 4-wire electric heat | View |
| Stelpro KI Z-Wave | Best for Z-Wave homes: hub-based automation | View |
The best pick for most compatible electric heaters
Mysa Baseboard V2
Mysa Baseboard V2 earns the top pick because it covers the practical overlap most shoppers need: high-voltage electric heat, 120V or 240V service, app scheduling and control through Apple HomeKit, Alexa and Google Home. Its stated load limit reaches 3800W on a 240V circuit, while the adaptive display can dim and wake on approach instead of lighting a bedroom all night. Mysa also includes energy insights, humidity alerts and geofencing, which make its automation more useful than simple remote temperature changes. Choose it when the wall box has the required four conductors and you want an ecosystem-friendly replacement for a compatible baseboard or convector control. The limitation is important: it is not for low-voltage systems or two-wire electric heat, and a circuit above its load limit needs a different electrical plan.
Pros
- Controls compatible 120V and 240V high-voltage electric heating circuits
- Works with HomeKit, Alexa and Google Home alongside the Mysa app
- Adaptive display, humidity alerts and energy insights add useful room context
Cons
- Requires a four-wire installation with a neutral or second live wire
- Its 3800W maximum at 240V may be too low for a large combined heater zone
A quieter fit for two- or four-wire electric heat
Sinopé TH1123WF
The Sinopé TH1123WF is the strongest alternative when wiring flexibility and quiet operation matter more than broad voice-platform support. It is made for electric baseboards, convectors, fan-forced convectors and radiant ceilings, supports two- or four-wire installations, and controls up to 3000W. That makes it worth a close look in homes where Mysa's four-wire requirement is a deal-breaker. Wi-Fi runs on 2.4GHz, and the Sinopé app supplies schedules, remote adjustment, geofencing and consumption graphs. Its silent operation is also meaningful in a bedroom where a mechanical thermostat click is noticeable. Pick it for a compatible electric zone where 3000W is sufficient and a straightforward Wi-Fi app is the priority. The tradeoff is capacity: calculate every heater on the circuit, because a long baseboard circuit can exceed its 3000W rating.
Pros
- Supports both two-wire and four-wire installations for compatible electric heat
- Designed for baseboards, convectors, fan-forced convectors and radiant ceilings
- Silent switching avoids the audible click that can distract in a sleeping space
Cons
- 3000W maximum load can exclude larger multi-heater zones
- Uses 2.4GHz Wi-Fi, so setup depends on suitable coverage at the thermostat
The specialist choice for an existing Z-Wave system
Stelpro KI Z-Wave
Stelpro KI Z-Wave is for the buyer whose automation plan already runs through a Z-Wave Plus hub. It is designed for line-voltage electric baseboards and convectors, so it addresses the right heating category instead of trying to adapt a low-voltage thermostat. Z-Wave Plus lets the thermostat participate in hub scenes and schedules, which can be attractive when the household already uses sensors, occupancy rules or a local controller. The white KI also keeps the wall control visually conventional, a benefit in rentals or multi-room retrofits where every room does not need an app-led interface. Choose it when hub-based automation is a requirement and the hub supports its device class. Its limitation is direct: Wi-Fi convenience is not built in. Without a compatible Z-Wave hub and some willingness to configure it, its central advantage disappears.
Pros
- Z-Wave Plus connectivity can join existing hub scenes and occupancy rules
- Purpose-built for line-voltage electric baseboards and convectors
- Conventional wall-mounted form suits multi-room electric-heating retrofits
Cons
- Needs a compatible Z-Wave hub before remote automation is useful
- Does not offer the simple Wi-Fi-first setup of the Mysa and Sinopé options
Installation and buying checks that prevent bad matches
Turn off the circuit and identify the existing thermostat wiring only if you are qualified to do so. Otherwise, an electrician can confirm voltage, conductor count and connected load quickly. Add the wattage markings of every heater controlled by one thermostat, then compare that total with the thermostat's rating. A 240V model is not automatically right merely because the building has a 240V breaker. The heater circuit and its wiring must match the product documentation.
Also decide how much independence you want from the cloud and from a phone. Mysa is the easy fit for people using HomeKit, Alexa or Google Home. Sinopé is compelling when its two-wire compatibility and quiet operation solve a real room problem. Stelpro makes most sense where Z-Wave is already the household's automation language. All three improve schedules and remote adjustments, but none can compensate for an incompatible electrical installation.
Frequently asked questions
Can I use a smart thermostat for a 240V electric baseboard?
Yes, but only a line-voltage model explicitly rated for your voltage, heater type and combined load. Mysa V2 supports 240V and is rated up to 3800W at that voltage; Sinopé TH1123WF is rated up to 3000W. Confirm wiring and total heater wattage before ordering, since these limits apply to the zone controlled by one thermostat.
Will a Nest or another low-voltage thermostat control electric baseboards?
Usually no. Standard low-voltage thermostats are designed for 24V HVAC controls, while electric baseboards commonly require line-voltage switching. Use a product specifically designed for electric heat or ask an electrician about an appropriate interface. Connecting an incompatible thermostat directly to a line-voltage circuit is not a safe workaround.
Is Wi-Fi or Z-Wave better for an electric-heating thermostat?
Wi-Fi is simpler for app control and mainstream voice assistants, which favors Mysa and Sinopé. Z-Wave is preferable when you already run a compatible hub and want the thermostat inside local scenes or sensor-driven rules, which favors Stelpro KI. The better choice is the one that matches the system you will actually maintain.
Prices and availability are accurate as of publication and can change.