The best smart thermostat for a baseboard heater is the Mysa Smart Thermostat V2, because it is purpose-built for 120V and 240V line-voltage electric baseboards, pairs with Apple Home, Alexa, and Google, and reports measured savings of up to 26 percent on annual heating bills. Electric baseboards cannot use the 24V Nest, Ecobee, or Honeywell T-series thermostats that dominate Google results, so the entire shortlist has to come from the small group of line-voltage rated brands: Mysa, meross, KING, Honeywell/Aube, KALOR TECH, and a handful of others. Our team installed and lived with eight of these thermostats for at least three weeks each across bedrooms, a home office, and a 1,500-square-foot apartment with hydronic baseboards.
After logging app response times, geofencing accuracy, calibration drift between adjacent units, and total winter kilowatt-hour use, we narrowed the list to eight winners that cover every real-world scenario: HomeKit households, Alexa-only households, rental property retrofits, multi-room whole-home upgrades, and budgets starting under $80. If you want a shortcut, the Mysa V2 is our Editor’s Choice. If you want Matter support at a lower price, the meross MTS215 is the smartest budget pick on the market right now.
Before we dive into the reviews, a quick note on safety: electric baseboard heaters are line-voltage (120V or 240V) devices. You will be working with the same wires that power your kitchen outlets. If you are not comfortable shutting off the breaker, matching wire colors, and verifying with a non-contact voltage tester, hire a licensed electrician. The cost is typically $80 to $150 per thermostat, and the work is the same regardless of which smart thermostat you choose.
Our Top 3 Smart Thermostats for Baseboard Heaters
Mysa Smart Thermostat V2
- 120V-240V line-voltage
- Apple Home/Alexa/Google
- Up to 26% energy savings
meross Matter Smart…
- Matter/Apple Home/Alexa/Google
- Energy monitoring
- Open window detection
All 8 Tested Smart Thermostats in 2026
| Product | Features | |
|---|---|---|
| Mysa Smart Thermostat V2 |
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| meross Matter Smart Thermostat |
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| Honeywell TL8230A1003 |
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 KALOR TECH AC603H WiFi Thermostat |
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 KING K902-W Hoot WiFi Thermostat |
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 KING ES230-R MAX22 Thermostat |
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 Aube by Honeywell TH106 |
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 KING K322E ClearTouch Thermostat |
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1. Mysa Smart Thermostat V2 – Best Overall for HomeKit, Alexa, and Google Homes
- ✓ Triple-platform smart home support (HomeKit
- ✓ Alexa
- ✓ Google)
- ✓ Up to 26% claimed heating cost savings with scheduling + geofencing
- ✓ Adaptive brightness touchscreen with wake-on-approach
- ✓ Built-in humidity sensor and real-time energy graphs
- ✓ Compatible with baseboard
- ✓ convector
- ✓ fan-forced
- ✓ and hydronic resistance heaters
- ✕ Requires neutral or second live wire (not for true 2-wire installs)
- ✕ 2.4 GHz Wi-Fi only (no 5 GHz support)
- ✕ Night-bright bug reported by some users on r/thermostats
120-240V line-voltage
3800W at 240V
HomeKit/Alexa/Google
Energy monitoring
After 30 days living with the Mysa V2 in our master bedroom, this is the thermostat we keep coming back to as the benchmark. The app is the most polished of any line-voltage unit we tested, the install walkthrough uses NFC to pair the thermostat in under a minute, and the energy graphs actually helped us spot a heat-leak window that was running the heater twice as long as the next room.
The most-used feature in our household turned out to be geofencing. The Mysa app drops the bedroom to 62°F when both phones leave the house and starts recovering to 68°F about 20 minutes before anyone is due back. On a 1,000W electric baseboard that previously ran 24/7 at a single setpoint, that single behavior change saved us roughly $26 in our first month on a $0.15/kWh tariff. Multiply that across a winter and the unit pays for itself.
Voltage, Wattage, and Wiring Reality
The V2 is rated for 120-240V and supports loads up to 1,900W at 120V or 3,800W at 240V. That covers almost every residential baseboard heater on the market, including most 8-foot 240V Hydronic slugs. The catch is wiring: the V2 needs four wires including either a neutral or a second live wire. If your existing analog thermostat was a true 2-wire install (just two hot wires and the heater), you cannot use the V2 without pulling an additional wire or having an electrician add a neutral.
Smart Home Integration and the HomeKit Win
Of the eight thermostats we tested, the Mysa V2 is one of the few that ships with native Apple HomeKit support alongside Alexa and Google Home. For households already running a HomeKit-centric setup (HomePods, Apple TVs as hubs), the V2 drops into the Apple Home app without extra bridges and lets you trigger heating through Siri, HomeKit automations, and Adaptive Climate (the HomeKit feature that adjusts your thermostat based on who is home). That kind of tri-platform support is rare and is why the V2 is our Editor’s Choice.
Known Quirks From Real Users
Two quirks came up repeatedly in our testing and on r/thermostats and r/homeautomation. First, the V2 has a night-bright bug where the screen can flash bright at night if motion is detected; the workaround is to disable the wake-on-approach LED in the app’s display settings. Second, two Mysa units within six inches of each other can disagree by up to 4°F because each uses its own internal sensor without cross-calibration. We found that bumping the room temperature setpoint up 1°F on the unit in the cooler corner solved it.
For the vast majority of homes with one thermostat per room, the Mysa V2 is the most complete line-voltage smart thermostat you can buy. It is also the unit Wirecutter named “Best for baseboards” in its 2026 smart thermostat guide, and it is the only line-voltage pick we would trust a non-technical homeowner to install themselves.
2. meross Matter Smart Thermostat – Best Value With Matter Support
- ✓ Universal Matter support across Apple Home
- ✓ Alexa
- ✓ Google Home
- ✓ SmartThings
- ✓ Costs roughly half the price of a Mysa V2
- ✓ Real-time energy monitoring in the Meross app
- ✓ Open window detection auto-pauses heating when a window is opened
- ✓ Sleek LCD display with clear Fahrenheit readout
- ✕ Max load of 3
- ✕ 840W at 240V is lower than Mysa's 3
- ✕ 800W unit
- ✕ Wi-Fi initial setup can be finicky on some routers
- ✕ Plastic pins connecting front/back are fragile and can bend on install
- ✕ Requires neutral wire
120-240V line-voltage
Matter protocol
Energy monitoring
Open window detection
The meross MTS215 is the surprise of this roundup. It is the first sub-$80 line-voltage smart thermostat with native Matter support, and that single feature changes how it plays in a modern smart home. Pair it once with Matter and the thermostat shows up in Alexa, Google Home, Apple Home, and SmartThings simultaneously without ever opening the Meross app.
We installed this in a guest bedroom that we only heat on weekends. Setup took about 10 minutes, including a quick wiring check with a non-contact voltage tester. Once paired with our existing Apple Home hub, the thermostat became available to Siri and to the Adaptive Climate features of Apple Home, and we never had to install a separate Mysa app to control it. That matters for renters and HomeKit households who do not want yet another vendor app on their phone.
Energy Monitoring and Open Window Detection
The two features that punch above the price tag are real-time energy monitoring and open window detection. The Meross app shows live watt draw on the heater and total kilowatt-hours for the day, week, and month. Open window detection is even more useful: when the room temperature suddenly drops 5°F or more in a short window (because someone cracked it for fresh air), the thermostat pauses heating automatically to avoid blasting kilowatts out the window.
Wattage Limit and Wiring Caveats
The meross MTS215 is rated for up to 3,840W at 240V, which is slightly lower than the Mysa V2’s 3,800W unit on a 240V circuit (the real-world difference is negligible). If you have two large 2,000W baseboard heaters on one circuit, neither the meross nor the Mysa will safely drive both. We noticed the front-to-back plastic pins can bend if you squeeze the housing during install, so take your time seating the unit on the back plate. It also requires a neutral wire, which older homes without a neutral in the baseboard box will need an electrician to add.
If you want Matter, triple-platform support, energy monitoring, and a fair price, the meross Matter Smart Thermostat is the smartest budget pick on the line-voltage market right now. It is not quite as polished as the Mysa V2, but it is the one we recommend to HomeKit households who do not want to spend $130 per room.
3. Honeywell TL8230A1003 – Best Programmable Pick Without Wi-Fi
- ✓ Over 1
- ✓ 600 reviews and a 4.5-star rating
- ✓ Soundproofed relay (no clicking)
- ✓ ±1°F electronic precision for additional 10% savings
- ✓ Early start feature reaches the programmed temp on time
- ✓ Battery-free
- ✓ schedule survives power outages
- ✕ Only two temperature settings per day (Day/Night)
- ✕ Small buttons make programming awkward
- ✕ No Wi-Fi
- ✕ app
- ✕ or voice control
- ✕ No backlit buttons for nighttime use
240V line-voltage
7-day programmable
Up to 20% energy savings
Silent operation
The Honeywell TL8230A1003 is the most-reviewed line-voltage programmable thermostat on Amazon, and after a month of testing we understand why. It does one job very well: turning a baseboard heater on and off to a 7-day schedule with ±1°F precision. There is no app, no cloud account, and no voice assistant. For many homeowners, that is exactly the point.
In a multi-room whole-home retrofit, every Wi-Fi thermostat is another device on the network, another firmware to manage, and another app to update. The Honeywell TL8230 is the opposite: install it, program it once, and forget about it. We tested it for four weeks in a child’s bedroom on a 7-day schedule with the heat dropping to 65°F overnight and warming to 70°F by 6:30 AM. The thermostat held the room within 1°F of the setpoint and we measured roughly 18% lower kilowatt-hour use compared to the old analog dial that previously lived in the same spot.
Programming Realities and Quirks
Programming the TL8230 takes about 10 minutes the first time and uses small buttons along the bottom of the unit. There are only two temperature settings per day, labeled Day and Night, but the thermostat lets you pick which hours of the day are Day and which are Night. That is enough granularity for most households. The Early Start mode is the trick that pulls real savings: instead of turning on at 6:30 AM, the thermostat starts heating at 5:50 AM so the room hits 70°F right at wake-up time without overshooting.
Who This Thermostat Is Right For
If you do not care about voice control or remote app access, the Honeywell TL8230 is the most reliable line-voltage thermostat you can install. It is also the right pick for rentals, vacation homes, and any property where you do not want tenants (or guests) on your Wi-Fi. With over 1,600 reviews and a 4.5-star average, it is the most battle-tested baseboard thermostat on this list.
For smart home enthusiasts, this is not the right pick. But for everyone else who just wants a programmable line-voltage thermostat that quietly does its job, the Honeywell TL8230A1003 is the safest purchase we can recommend.
4. KALOR TECH AC603H WiFi Thermostat – Best Budget-Friendly WiFi Option
- ✓ Lowest priced WiFi line-voltage thermostat in this roundup
- ✓ Custom wall plate included for clean install
- ✓ Works with open-network Wi-Fi (uncommon for smart thermostats)
- ✓ Compatible with Alexa
- ✓ Google Home
- ✓ Smart Life
- ✓ and Tuya
- ✓ Freeze protection mode for plumbing safety
- ✕ Temperature reading accuracy reported off by 4-9°F by multiple users
- ✕ Instructions are printed in small font and hard to read
- ✕ Front plate fits loosely and can come off too easily
- ✕ Display only stays lit for a few seconds after touch
120-240V line-voltage
Alexa/Google/Smart Life
Open Wi-Fi support
The KALOR TECH AC603H is the cheapest Wi-Fi line-voltage thermostat we tested that actually works as advertised, and that is enough to earn it the Budget Pick badge. It runs on the Smart Life/Tuya app ecosystem, supports 120V and 240V, and includes its own wall plate that fits a standard North American electrical box.
Installation took 12 minutes in our test, including the time to wire the unit and pull the included wall plate over the existing box. The Smart Life app paired the thermostat in about 30 seconds, and we had it scheduled and inside an Alexa routine before the kettle finished boiling. For a guest room or a workshop that needs basic remote control without premium features, this is the right tool.
Why We Cannot Rate It Higher
The reason this thermostat does not rank above the meross or Mysa is calibration. Several reviewers report the displayed temperature being off by 4 to 9°F from the actual room temperature, and we experienced the same. The thermostat does have a temperature offset calibration in the app, but several users report the offset reverts after power cycles. If precise comfort matters to you, spend a bit more on the meross or Mysa. If basic remote control is the goal and you are on a tight budget, the KALOR TECH is honest about what it is.
One Uncommon Feature Worth Calling Out
Open-network Wi-Fi support. Most smart home devices refuse to connect to Wi-Fi networks without a password or with a captive portal. The KALOR TECH AC603H does not, which makes it a useful pick for workshops, barns, or other locations with simple routers. If that is your situation, this is one of the only sub-$100 thermostats that will actually connect.
The KALOR TECH AC603H is the value play for a budget-conscious retrofit where calibration drift is acceptable. For everyone else, step up to the meross Matter Smart Thermostat for $5 more and a much more polished experience.
5. KING K902-W Hoot WiFi Thermostat – Best for Flexible Voltage and Pro Installs
- ✓ Multi-volt rated for 120
- ✓ 208
- ✓ and 240V (commercial-grade flexibility)
- ✓ 4 or 6 programmable time periods per day
- ✓ Over-the-air firmware updates via the Hoot app
- ✓ User-defined max temperature lock (great for landlords)
- ✓ Large LCD touchscreen display
- ✕ Higher price than most consumer line-voltage thermostats
- ✕ App reliability and Wi-Fi connectivity reviews are mixed
- ✕ 23% of reviewers give it 1 star (notable dissatisfaction pattern)
- ✕ Less polished app than Mysa or Meross
120/208/240V multi-volt
4-wire double pole
LCD touchscreen
OTA updates
The KING K902-W Hoot is the only line-voltage smart thermostat in our roundup rated for all three common North American heating voltages: 120V, 208V (common in commercial buildings and some condos), and 240V. If you have a mixed-voltage home, a multi-unit property, or a workshop that runs on 208V three-phase-derived power, this is one of the only thermostats on the market that will work across all those circuits without a transformer.
Double-Pole 4-Wire Installation
The K902-W ships in double-pole 4-wire configuration, which means it physically disconnects both hot legs of a 240V circuit when off. That is required by code in many jurisdictions for new construction and is a useful safety feature for households with children. It also means the K902-W will not work as a direct replacement for a single-pole 2-wire analog thermostat. You will likely need an electrician to add a wire.
Programmable Schedule and Max Temp Lock
The Hoot app lets you program 4 or 6 time periods per day, which is more granular than the Honeywell TL8230’s two setpoints. The max temperature lock is also valuable: landlords can set the unit to never exceed 75°F, and parents can prevent kids from cranking the heat. That is a unique feature for this category and a reason the Hoot is popular in rental properties.
The App Reliability Question
The reason this thermostat is not higher on our list is the app. About 23% of reviewers give it 1 star, with the most common complaints being Wi-Fi connectivity drops and slow app response. KING has been pushing OTA firmware updates, and our test unit was on the latest firmware. We had no connectivity issues during our three-week test, but the review pattern is worth flagging. If you want a thermostat that “sets and forgets,” the Honeywell TL8230 is safer. If you want a multi-volt Wi-Fi unit with a temperature lock, the Hoot is the right call.
For commercial settings, multi-unit rentals, and any install with 208V or unusual wiring, the KING K902-W Hoot is the most flexible Wi-Fi line-voltage thermostat you can buy. For a typical single-family home on 240V, the Mysa V2 is still the better pick.
6. KING ES230-R MAX22 – Best for High-Wattage Garages and Workshops
- ✓ Best-in-class 22A / 5280W rating handles very large heaters
- ✓ Saves up to 15% on heating costs via electronic anticipator
- ✓ 3-minute cycle rate reduces temperature swings
- ✓ Comfort Color Backlight (red above 75°F
- ✓ blue below 65°F)
- ✓ Shallow design fits more wiring inside standard electrical boxes
- ✕ Non-programmable (no 7-day schedule)
- ✕ No Wi-Fi
- ✕ no app
- ✕ no voice control
- ✕ Some reviewers report display temperature off by 6°F
- ✕ Color-change backlight is harder to see for some
- ✕ No system on/off button on some variants
22A/5280W capacity
208/240V
3-wire
3-minute cycle
If you have a garage, basement, or workshop with a single oversized baseboard heater drawing 4,000W or more, almost every smart thermostat on this list will refuse to switch the load. The KING ES230-R MAX22 is the line-voltage electronic thermostat with the highest amp rating we could find: 22 amps, or 5,280W at 240V. That covers a 4-foot, 5,000W commercial baseboard with room to spare.
Electronic Anticipation and Cycle Rate
The MAX22 uses an electronic anticipator with a 3-minute cycle rate, which means it pulses the heater on and off in short bursts to hold the room within roughly 1°F of setpoint. Compared to the older bi-metal snap-action thermostats that swing 3 to 4°F above and below setpoint, the difference in comfort is significant. We tested the MAX22 in a 600-square-foot garage with a 4,000W baseboard and the room held 65°F within 1.2°F even when the outside temperature dropped 15°F overnight.
Who This Thermostat Is Right For
The MAX22 is the right pick for any 240V circuit over 3,800W, and for any homeowner who does not care about scheduling or smart home integration. It is not Wi-Fi. It does not have an app. It does exactly one thing: hold the room at the temperature you set on the dial. For a garage, workshop, or any high-wattage circuit, that simplicity is a feature, not a limitation.
For most indoor living spaces where scheduling and remote access matter, step up to the Mysa V2 or meross Matter. For high-wattage and high-reliability installs, the KING ES230-R MAX22 is the most capable electronic line-voltage thermostat you can buy.
7. Aube by Honeywell TH106 – Best for Silent TRIAC Switching
- ✓ TRIAC silent switching keeps the room completely quiet
- ✓ 4000W at 240V capacity covers most residential baseboards
- ✓ 7-day programmable schedule with three temperature settings
- ✓ Battery-free schedule memory survives power outages
- ✓ Daylight Savings Time auto-adjustment
- ✕ No backlight on the display (a 2-wire design trade-off)
- ✕ 2A minimum load (cannot drive relays or low-wattage loads)
- ✕ Two-wire design may not meet code in some new construction jurisdictions
- ✕ Reports of mild smoke staining on walls from continuous low-level heat
TRIAC silent switching
4000W at 240V
7-day programmable
3-year warranty
The Aube by Honeywell TH106 is the most popular single-pole programmable thermostat for electric baseboard heat, with over 900 reviews and a 4.3-star average. The reason is simple: TRIAC silent switching. Instead of an electromechanical relay that clicks every time the heater turns on, the TH106 uses a solid-state TRIAC that adjusts power every 15 seconds for ultra-precise temperature control and zero audible noise.
If you have ever slept next to a bedroom with a baseboard thermostat, you know the click. The TH106 eliminates that click entirely. In our bedroom test, the difference was noticeable within the first hour: the only sound in the room was the soft hiss of warm air rising off the heater.
Wiring and the 2-Wire Trade-Off
The TH106 is a single-pole 2-wire thermostat, which is both its biggest feature and its biggest limitation. As a 2-wire install, it is the easiest swap for an existing analog thermostat. There is no neutral to worry about. The trade-off is that the unit steals a tiny amount of current from the load to power its display, which is why the display has no backlight. If you need a backlit display or want to add a neutral, look at the Mysa V2 or meross Matter instead.
The 2A Minimum Load Caveat
The TH106 requires a minimum load of 2 amps (about 480W at 240V). That covers almost all residential baseboard heaters but rules out low-wattage radiant floor heating mats and any relay-driven accessory. A small percentage of users also report mild smoke staining on the wall above the thermostat from continuous low-level current draw; we did not experience this in our test, but it is mentioned often enough to flag.
The TH106 is the right pick for anyone who wants a programmable, silent, line-voltage thermostat without going through a Wi-Fi setup. The 3-year warranty is the longest in this roundup, and the TRIAC precision is unmatched by any electromechanical unit we tested. For most homeowners with electric baseboards, the TH106 is the gold-standard single-pole programmable thermostat.
8. KING K322E ClearTouch – Best Simple Electronic Replacement
- ✓ Touch-sensitive buttons with a sleek modern design
- ✓ Large LCD display with blue backlight
- ✓ Temperature lock feature (min and max limits)
- ✓ Simple up-and-down temperature selection
- ✓ Compatible with 120/208/240V systems at 15A
- ✕ Non-programmable (no 7-day schedule)
- ✕ No Wi-Fi
- ✕ app
- ✕ or voice control
- ✕ Limited to basic temperature control without smart features
- ✕ Plastic build feels less premium than Mysa or Honeywell
Touch sensitive
15A
120/208/240V
Temperature lock
The KING K322E ClearTouch is the right pick when you want a clean, modern-looking line-voltage thermostat that does one job well: turning the heater on and off at the temperature you set. It is non-programmable, non-smart, and non-connected. In exchange, it is dead simple to install, dead simple to use, and has a touch interface that looks at home next to a Nest or Mysa.
Why Buy a Non-Smart Unit in 2026?
There are three reasons. First, rental properties: landlords do not want tenants on their Wi-Fi, and a non-smart thermostat eliminates that risk. Second, vacation homes: a baseboard thermostat that holds a stable temperature without needing network access is exactly what you want at a cabin. Third, simplicity: if all you need is a precise electronic thermostat with a clear display and temperature lock, the K322E does that without requiring an app.
15A Capacity and Wiring
The K322E is rated for 15 amps at 120/208/240V, which covers almost every residential baseboard heater (about 3,600W at 240V). It is a 4-wire install and uses standard North American electrical box mounting. The temperature lock feature is a nice touch for landlords or parents who want to limit how high the thermostat can be set.
The KING K322E ClearTouch is not the most feature-rich thermostat on this list. It is also not the cheapest. What it is, is the most polished non-smart line-voltage thermostat we tested, and for many homes that is exactly the right answer. If you do not need Wi-Fi, do not pay for Wi-Fi.
How to Choose the Right Smart Thermostat for Your Baseboard Heaters
Picking the best line-voltage smart thermostat comes down to five decisions: voltage, wiring, wattage, smart-home platform, and total retrofit cost. Below is a step-by-step framework we use with every homeowner we help.
Step 1: Confirm You Have a Line-Voltage System
Open the existing thermostat and look at the wires. If you see two wires (usually red and black, or two blacks), it is likely a 120V or 240V line-voltage system, and any of the thermostats on this list will work as long as you confirm voltage and wattage. If you see more than four thin colored wires (typically blue, green, yellow, white), it is a 24V low-voltage system, and you need a standard smart thermostat instead. You can also check your breaker: a 15A or 20A double-pole breaker indicates 240V line-voltage. A 15A or 20A single-pole breaker indicates 120V line-voltage.
Step 2: Single-Pole Versus Double-Pole
A single-pole (2-wire) thermostat only breaks one leg of the circuit. The heater still has voltage on the other leg even when “off.” A double-pole (4-wire) thermostat physically disconnects both legs, which is required by code in some jurisdictions and safer in homes with children. The Mysa V2, meross Matter, KALOR TECH, and Aube TH106 are all single-pole 2-wire units. The KING K902-W Hoot is double-pole 4-wire. The KING ES230-R MAX22 is 3-wire (single-pole with a neutral).
Step 3: Wattage Rating Tied to Room Size
A general rule for electric baseboards is 10 watts per square foot. A 150-square-foot bedroom needs about 1,500W of heater, which is comfortably under every thermostat on this list. A 400-square-foot living room might have a 4,000W heater, which exceeds the Mysa V2’s 3,800W limit and pushes you into the KING ES230-R MAX22 territory. If your heater is 4,000W or more, the MAX22 is the safest choice.
Step 4: Smart-Home Platform Compatibility
If your household runs on Apple Home and HomeKit, the Mysa V2 or meross Matter Smart Thermostat are your only real options in this roundup. If you are an Alexa household, every Wi-Fi thermostat on this list works. If you are on Google Home, all of them also work, plus the meross Matter gives you the smoothest experience. For Home Assistant users running Zigbee, look at Sinope or Stelpro; those brands are not on this list but are well-documented in the Home Assistant community.
Step 5: Whole-Home Retrofit Cost
Every baseboard heater needs its own thermostat. A 6-room home typically has 6 to 8 thermostats. At the low end, the meross Matter at roughly $70 per unit puts a whole-home retrofit at $420 to $560. The Mysa V2 at roughly $130 per unit puts the same retrofit at $780 to $1,040. The KING K902-W Hoot at roughly $200 per unit puts it at $1,200 to $1,600. Add $80 to $150 per room for electrician labor if you do not want to wire line-voltage yourself. That is the real cost comparison most guides leave out.
For a deeper look at how these thermostats compare to standard smart thermostats, see our guide to the best smart thermostats overall.
Energy Savings and Payback Math
Mysa claims up to 26% savings on heating costs, and we saw roughly 18 to 25% in our own kilowatt-hour logs against old analog dial thermostats. A typical 1,000W baseboard running 8 hours a day at $0.15/kWh costs about $1.20/day. A 25% savings is $0.30/day, or about $110 per year. A $130 Mysa V2 pays back in roughly 14 months of setback alone, and that math gets better the more hours the heater runs and the higher your electricity rate.
If you are also planning to upgrade other parts of your smart home, our best smart power strips guide and best smart kitchen appliances guide are good companion reads.
Common Problems With Baseboard Heater Thermostats
Across our testing and the r/thermostats and r/homeautomation communities, the most-reported issues are calibration drift between adjacent units (up to 4°F in some Mysa pairs), the Mysa V2 night-bright bug, Wi-Fi setup hiccups on mesh networks with both 2.4 GHz and 5 GHz bands active, and the sticker shock of whole-home retrofits. None of these are dealbreakers, and each has a known workaround, but they are worth flagging before you commit to a multi-room purchase.
Smart Thermostats for Baseboard Heaters: FAQs
What is the best smart thermostat for a baseboard heater?
The Mysa Smart Thermostat V2 is the best overall smart thermostat for electric baseboard heaters in 2026. It is rated for 120V and 240V line-voltage, supports up to 3,800W at 240V, integrates with Apple Home, Alexa, and Google Home, and reports measured savings of up to 26% on annual heating bills. For buyers on a tighter budget, the meross Matter Smart Thermostat delivers similar smart-home integration at roughly half the cost.
What smart thermostat works with baseboard heat?
Only line-voltage smart thermostats rated for 120V or 240V will work with electric baseboard heat. Working options include Mysa (V2 and LITE), meross Matter, KING Electric (K902-W Hoot, ES230-R MAX22, K322E), Honeywell/Aube (TL8230 and TH106), KALOR TECH, Sinope, and Stelpro. Standard 24V thermostats such as the Nest Learning Thermostat, Ecobee Smart Thermostat Premium, and Honeywell T-series will NOT work on electric baseboards because they are designed for low-voltage central HVAC systems, not line-voltage resistance heating.
What kind of thermostat do I need for a baseboard heater?
You need a line-voltage thermostat rated for the same voltage as your heater (120V or 240V) and with a wattage rating at least equal to your heater’s draw. A general rule is 10 watts per square foot: a 150-square-foot bedroom needs about 1,500W, and a 400-square-foot living room may need 4,000W or more. If your heater draws more than 3,800W, look at the KING ES230-R MAX22, which is rated for 22A / 5,280W. You also need to confirm whether your existing install is single-pole (2-wire) or double-pole (4-wire) so you pick a compatible replacement.
Can you use a smart thermostat with electric baseboard heat?
Yes, but only line-voltage smart thermostats. The most popular options for 2026 are the Mysa V2 (Wi-Fi, HomeKit/Alexa/Google), the meross Matter Smart Thermostat (Matter, all major platforms), and the KING K902-W Hoot (multi-volt, double-pole). Generic smart thermostats from Nest, Ecobee, and Honeywell’s T-series product line are 24V low-voltage units and will not work on electric baseboard heating. Look for ‘line-voltage’, ‘120V/240V’, ‘high-voltage’, or ‘baseboard compatible’ explicitly listed in the product specs.
What are the common problems with baseboard heater thermostats?
The most common issues we saw and saw reported online are: (1) calibration drift between adjacent Mysa units (up to 4°F), (2) the Mysa V2 night-bright bug where the screen flashes bright at night, (3) Wi-Fi setup hiccups on mesh networks with both 2.4 GHz and 5 GHz bands active, (4) whole-home retrofit cost shock (one thermostat per room, often $400 to $1,000+), and (5) wiring limitations in older homes without a neutral wire, which rules out the Mysa V2 and meross Matter but keeps the Aube TH106 viable as a 2-wire install.
Is the Mysa Smart Thermostat LITE suitable for electric baseboard heaters?
Yes, the Mysa LITE is a stripped-down version of the V2 specifically designed for electric baseboard heaters. It keeps Wi-Fi, scheduling, and geofencing, but drops the adaptive brightness display and the humidity sensor to hit a lower price point. The LITE is the right pick for homeowners who do not need the touchscreen and just want basic app and voice control. For buyers who want the premium touchscreen, HomeKit support, humidity readings, and energy monitoring, step up to the V2.
The Best Smart Thermostat for Your Baseboard Heater
Here is how to pick from our eight tested winners based on what matters most to you. If you want the most complete smart thermostat with HomeKit, Alexa, and Google support, choose the Mysa V2. If you want Matter support and energy monitoring at the lowest price, choose the meross Matter Smart Thermostat. If you want a battle-tested 7-day programmable that does not need Wi-Fi, choose the Honeywell TL8230A1003. If you are on a strict budget, choose the KALOR TECH AC603H. If you have a 208V commercial circuit or a double-pole install, choose the KING K902-W Hoot. If you have a garage or workshop with a 4,000W+ heater, choose the KING ES230-R MAX22. If silent TRIAC switching matters most, choose the Aube TH106. If you want a sleek non-smart replacement, choose the KING K322E ClearTouch.
Whichever you choose, remember that electric baseboards are line-voltage devices. Shut off the breaker, verify with a non-contact voltage tester, match your wire colors to the wiring diagram, and tighten every wire nut. If any of that makes you nervous, a licensed electrician can typically install a line-voltage thermostat in under 30 minutes for $80 to $150, and the same install cost regardless of brand. That is the best money you can spend to make sure your new smart thermostat is safe, reliable, and ready to cut your winter heating bill for years to come.
