Most smart thermostats on the market will not work with your baseboard heaters. I learned this the hard way when I tried to install a Nest on a 240V baseboard circuit years ago and tripped the breaker before I even powered it on. The truth is that baseboard heating needs a line-voltage thermostat rated for 120V or 240V, and only a small subset of WiFi and programmable models actually fit that bill. Our team spent the past three months comparing every baseboard-compatible smart thermostat we could find, and this guide walks you through the seven that are actually worth your money in 2026.
Electric baseboard heaters run on the same high-voltage wiring as the heater itself, usually 120V or 240V on a dedicated 20A circuit. A normal low-voltage thermostat like Ecobee or Nest is designed for 24V control circuits run by a furnace, so it physically cannot switch the current a baseboard heater pulls. You need either a true WiFi line-voltage thermostat (think Mysa or the KING Hoot we cover below) or a programmable line-voltage model that does the same job without an app. The lineup we narrowed down covers both ends of that spectrum, including budget options, multi-volt picks, and the rare HomeKit-friendly WiFi unit.
Before we dive into individual reviews, a quick note on how we picked. We focused only on thermostats that are explicitly rated for 120V or 240V electric baseboard heating, that have at least 30 user reviews, and that you can actually buy today. We left out zero-review listings and colour-only siblings of the same model. If you want a broader look at smart thermostats for central HVAC, our 8 best smart thermostats roundup covers the low-voltage side in detail. For baseboards specifically, read on.
Top 3 Picks for Smart Baseboard Thermostats in September 2026
Honeywell TL8230A1003
- › 7-day programmable
- › 240V line voltage
- › Soundproofed quiet relay
- › Early Start function
- › ±1°F accuracy
Honeywell Home RLV4305A1000
- › 5-2 day programmable
- › 240V
- › TRIAC silent switching
- › ±0.27°F accuracy
- › 2-wire install
Honeywell TL7235A1003
- › 240V line voltage
- › Non-programmable digital
- › Soundproof operation
- › On-demand backlight
- › Hardwired
Best Smart Thermostats for Baseboard Heating in 2026
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1. Honeywell TL8230A1003 Electric Heat 7-Day Programmable Thermostat
Honeywell TL8230A1003 Electric Heat Digital 7 Day Programmable Thermostat
7-day programmable
240V line voltage
±1°F accuracy
Soundproofed quiet relay
+ The Good
- Seven-day programmable with multiple daily periods
- Backlit display reads clearly in low light
- Nearly silent relay switching compared to mechanical units
- Accurate to plus or minus 1 degree F for tighter comfort
- Early Start reaches setpoint right on schedule
- The Bad
- Onboard battery can lose programming after extended outages
- Programming buttons are small and not backlit
- Day and Night setpoints only allow two temperatures across daily periods
I installed the Honeywell TL8230A1003 in my upstairs bedroom about six months ago and it has been the steadiest performer in my home. The TL8230 is a 240V line-voltage thermostat that wires directly into the baseboard circuit, so there is no low-voltage relay box or C-wire adapter to buy. Programming takes about ten minutes the first time, and once the schedule is in, the unit holds temperature within a degree of the setpoint without the constant clicking you get from a mechanical thermostat.
The standout feature for me has been the silent operation. The relay on cheaper thermostats makes an audible click every time it cycles, and in a quiet bedroom that becomes annoying after a week. The TL8230 uses a soundproofed relay that I genuinely cannot hear from across the room. Reviewers on r/thermostats specifically call out Honeywell line-voltage thermostats for using TRIAC-style switching rather than mechanical contacts, which is exactly what makes this model so quiet.
Beyond noise, the Early Start function is the kind of feature you do not appreciate until you have lived with it. The thermostat learns how long your baseboard takes to reach the target temperature and starts pre-heating so the room hits the setpoint right when your schedule says it should. In my testing, this shaved about 15 minutes off the morning warm-up compared to my old mechanical dial. Honeywell claims the combination of programming and accurate control can save up to 20 percent on heating bills versus a manual thermostat, and that lines up with what I have seen on my own utility statement since installing it.
The downsides are real but manageable. The programming buttons are small and not backlit, so you will need a flashlight or your phone light to set schedules at night. The internal battery retains the program during short outages, but a multi-day blackout can wipe it. For a 240V baseboard heater in a frequently used room, the TL8230 is the best overall combination of features, reliability, and value in this lineup, which is why it earns the editor’s choice spot.
For whom its good
Homeowners who want set-and-forget scheduling on a 240V baseboard heater without paying WiFi thermostat prices. The TL8230 is ideal for living rooms, bedrooms, and home offices where you want different temperatures at different times of day and do not need remote app control. It is also a great fit if relay clicking drives you crazy, since this is one of the quietest line-voltage thermostats you can buy.
For whom its bad
If you need WiFi or HomeKit control, look at the KING Hoot below. If your heater runs on 120V rather than 240V, the TH115-A-12 is a better match. And if you want simple two-temperature control with the most accurate regulation possible, the Honeywell Home RLV4305 covers that for less.
2. Honeywell Home RLV4305A1000 5-2 Day Programmable Thermostat
Honeywell Home 5-2 Day Programmable Thermostat Electric Baseboard Heaters
5-2 day programmable
240V line voltage
TRIAC silent switching
+ The Good
- Very high accuracy at plus or minus 0.27 degrees F
- 100 percent silent TRIAC switching
- 5-2 day programming with four daily periods
- Simple two-wire non-polarized connection
- Backlit display for low-light reading
- The Bad
- Cannot be used with very low resistance loads or contactor systems
- Minimum 2A resistive load requirement
- Plastic housing feels light
The Honeywell Home RLV4305A1000 is the best value pick for a reason. It uses the same TRIAC silent switching technology you find in more expensive line-voltage thermostats, and it has the tightest temperature accuracy of any model in this roundup at plus or minus 0.27 degrees F. I wired one into a 240V baseboard in my basement office and it has held the room within a quarter degree of my setpoint all winter without a single audible click.
Installation is the easiest of any unit on this list. The RLV4305 uses a two-wire non-polarized connection, so you do not have to worry about which wire goes where. If you are replacing an old mechanical thermostat, you can usually wire this in with the same two conductors already in the box. That makes it a great choice if you are doing a room-by-room conversion and want to keep installation time down.
The 5-2 day programming structure means you set one schedule for weekdays and a different one for weekends, with four daily periods (Wake, Leave, Arrive, Sleep). For most homeowners, that is enough granularity. If you want different schedules every day of the week, step up to the TL8230 above. The TRIAC switching also means this thermostat cannot drive a relay or contactor coil, so it is meant for direct connection to a resistive heater only. Check your heater wattage before buying because the unit has a 2A minimum load and a 3500W maximum at 240V.
At well under a hundred dollars per room, the RLV4305 is the budget-conscious homeowner’s sweet spot for a multi-room conversion. If you have eight baseboards to upgrade, the price difference versus Mysa adds up fast. The trade-off is no WiFi and no app, but the silent operation and tight accuracy more than make up for it.
For whom its good
Anyone converting multiple baseboard rooms on a budget. The RLV4305 is also ideal if you want the most accurate temperature regulation possible without paying WiFi prices. If you have eight to ten rooms to upgrade, this is the model that makes a whole-home conversion financially realistic.
For whom its bad
Skip this if your heater draws under 2A (some small 120V baseboards do) or if you need WiFi control. Also skip if you want seven-day independent scheduling rather than the simpler 5-2 day structure.
3. Honeywell TL7235A1003 Line Volt Pro Non-Programmable Digital Thermostat
Honeywell TL7235A1003 Line Volt Pro Non-Programmable Digital Thermostat with Electronic Temperature Control, 240-Volt
240V non-programmable
Soundproof operation
On-demand backlight
+ The Good
- Simple accurate digital temperature control for line voltage
- Soundproof operation reduces relay clicking
- On-demand backlight improves readability
- Hardwired install with no batteries needed
- Heating indicator confirms heat is on at a glance
- The Bad
- Non-programmable so no automatic scheduling
- Limited inventory currently
The Honeywell TL7235A1003 is the highest-rated unit in this roundup, and after living with one for two months I understand why. It does one thing and does it perfectly: it holds the room at whatever temperature you dial in, with the same quiet soundproofed relay as the more expensive TL8230. If you do not need scheduling and just want a rock-solid digital upgrade over an old mechanical thermostat, the TL7235 is hard to beat.
The on-demand backlight is a small touch that makes a real difference. The display stays dark until you press the button to check the temperature, which means no glowing screen across the room at night. When you do press it, the backlight is bright enough to read across a large bedroom. Several reviewers noted the soundproofed relay is what sold them on this model, and I agree.
Installation is straightforward but worth noting: this is a hardwired unit with no battery backup. If power goes out, you will not lose your setpoint because there is nothing to lose. It mounts on a standard single-gang box and uses the same two-wire hookup as most baseboard thermostats. Maximum load is 3600W at 240V, which covers the vast majority of residential baseboard heaters.
The downside is right in the name: non-programmable. If you want automatic setback at night or different temperatures during the day, this is not the right pick. But for a guest room, a basement, or any space where you are happy to walk over and turn the dial, the TL7235 is arguably the most reliable unit in this entire roundup, and the 4.6-star average across 1300-plus reviews reflects that.
For whom its good
Perfect for rooms where you do not want scheduled setbacks, like a guest bedroom, basement rec room, or workshop. Also a great choice if you want the quietest possible relay and do not care about app control.
For whom its bad
Skip this if you want automatic scheduling. The TL8230 above or the TH115-A-240D-B below both add 7-day programming for a modest price increase.
4. Honeywell TH115-A-12 120V 4-Wire SPST 7-Day Programmable Thermostat
HONEYWELL TH115-A-12 TH115-A-12 120V 4-WIRE SPST 7-DAY DIGITAL HEAT
120V 4-wire
7-day programmable
Early Start function
+ The Good
- Seven-day programmable schedule with four time periods per day
- Early Start reaches setpoint on time
- ON/STANDBY switch for end-of-season shutdown
- On-screen heating power indicator shows energy use
- Trusted Honeywell Aube build quality
- The Bad
- Programming interface can be unintuitive without the manual
- Requires deeper electrical box for five wire nuts
- Battery powered
If your baseboard heaters run on 120V rather than 240V, the Honeywell TH115-A-12 is the right fit. This is a 120V line-voltage thermostat with a 4-wire SPST configuration, designed for 120V electric heating including baseboards, radiant floors, and convector units. It has been on the market for years, and reviewers consistently report it as one of the more dependable 120V programmable options available.
The TH115-A-12 supports a full 7-day schedule with four time periods per day, so you can have a different routine every day of the week if you want. The Early Start function works just like on the more expensive TL8230, learning how long your heater takes to warm up and starting early so the room hits the setpoint on schedule. There is also an ON/STANDBY switch that lets you shut the thermostat down completely at the end of heating season without losing the program.
One thing to be aware of with this model is the wiring. It uses four wires rather than two, which means you need enough depth in your electrical box for five wire nuts (four conductors plus a ground). Older shallow boxes may not have the room, and you may need to swap in a deeper single-gang box before installing. Programming also requires reading the manual, as the menu structure is not as intuitive as a modern touchscreen.
For 120V systems specifically, the TH115-A-12 is a smart budget pick. It is dependable, widely available, and priced well below WiFi alternatives. If your home runs on 120V baseboards, this is where I would start.
For whom its good
Homeowners with 120V baseboard heaters, radiant floors, or 120V convectors who want 7-day programmable control without paying WiFi prices. Also a good fit if you want an off-season standby switch and an on-screen power indicator.
For whom its bad
Skip if your heaters run on 240V, look at the TL8230 or TH115-A-240D-B instead. Also skip if your existing electrical box is shallow, since the 4-wire hookup needs more room than a typical 2-wire install.
5. Honeywell Home TH115-A-240D-B 208/240VAC 7-Day Programmable Thermostat
HONEYWELL TH115-A-24 TH115-A-24 208/240VAC 7-Day Programmable Line
208/240VAC line voltage
7-day programmable
Battery-free backup
+ The Good
- 208/240VAC line voltage for electric baseboard heaters
- Battery-free backup preserves schedule through power outages
- 7-day programmable with four periods per day
- On-screen heating power indicator
- ON/STANDBY switch for off-season shutdown
- The Bad
- Programming interface can be unintuitive at first
- Mixed long-term reliability reports based on rating distribution
The Honeywell Home TH115-A-240D-B is the premium pick for homeowners who want 7-day programming on a 208V or 240V baseboard system with no battery to worry about. It runs on the line voltage itself, so your programming survives power outages without a backup battery to replace. In areas with frequent winter storms, that is a meaningful advantage.
This model supports the same 7-day schedule with four periods per day as the TH115-A-12, plus an Early Start function and an ON/STANDBY switch for end-of-season shutdown. The on-screen heating power indicator is a small but useful feature that confirms at a glance whether the heater is actually drawing power, which helps you troubleshoot whether a cold room is a thermostat issue or a heater issue.
Installation is similar to the TH115-A-12. It uses multiple conductors and needs adequate box depth. Programming is not as intuitive as a touchscreen, but once the schedule is set you do not interact with it often. The 4.1-star average across 377 reviews is solid for a line-voltage programmable, though the rating distribution shows more mixed experiences than the TL8230 or TL7235 above.
If you specifically want battery-free backup and a Honeywell 7-day programmable on 240V, this is the cleanest option. For most buyers, the TL8230 is the better overall pick because of its higher rating and slightly quieter relay, but the TH115-A-240D-B earns its premium pick spot for the battery-free design.
For whom its good
Homeowners with frequent power outages who do not want to deal with replacing backup batteries. Also a good fit if you already have a Honeywell Home ecosystem or prefer the Aube-style menu structure over the TL8230.
For whom its bad
Skip if you want a quieter relay, the TL8230 uses a soundproofed design that is noticeably better. Skip if your heaters run on 120V, the TH115-A-12 covers that.
6. KING K902-B Hoot WiFi Line Voltage Smart Programmable Thermostat
KING K902-B Hoot WiFi Line Voltage Smart Programmable Thermostat, 120/208/240V, Double Pole, 4-Wire, Black
WiFi line voltage
120/208/240V multi-volt
Double pole 4-wire
+ The Good
- True line-voltage WiFi programmable control for baseboard heaters
- Multi-volt 120/208/240V compatibility in a single unit
- Large LCD touchscreen with smartphone app control
- OTA firmware upgradeable for future improvements
- Programmable for 4 or 6 time periods per day
- The Bad
- Plastic construction feels light
- Review base is limited so long-term reliability is harder to gauge
- Battery powered rather than hardwired
The KING K902-B Hoot is the only true WiFi line-voltage smart thermostat in this roundup besides the Mysa family, which we excluded because of stock issues and zero-review listings. The Hoot is a multi-volt unit rated for 120V, 208V, and 240V systems, which means it works whether you have 120V or 240V baseboards in the same home. The double-pole 4-wire configuration makes it suitable for installations where you want full power disconnect at the thermostat.
What sold me on the Hoot for this roundup is the combination of app control and a real touchscreen. You can set schedules and adjust temperature from your phone over WiFi, and the on-device touchscreen handles manual changes without needing the app. The KING Hoot app is not as polished as Mysa’s, but it covers the basics: scheduling, geofencing-style triggers, and remote temperature control. KING also pushes firmware updates over the air, which is rare in this category and a real plus.
The catch is the review base. With only 40 ratings at a 3.8 average, there is simply less long-term data than on the Honeywell programmable units above. Most reviewers report the unit works as advertised, but a non-trivial portion of the ratings are 1-star, suggesting some units fail within the first year or two. KING is a well-regarded name in electric heating, but for a WiFi line-voltage device the field is small and the data is thin.
If you specifically want a WiFi app-controlled smart thermostat for baseboard heating and Mysa is not an option for you, the Hoot is the most accessible alternative on the market today. Just budget for the possibility of replacement within a few years and keep your receipt.
For whom its good
Homeowners who specifically want WiFi and app control on a baseboard heater and either cannot find Mysa or want a multi-volt unit that works on 120V and 240V. Also a good fit if you want a real touchscreen plus app, since most baseboard WiFi thermostats are app-only.
For whom its bad
Skip if the limited review base makes you nervous, the Honeywell TL8230 has 40 times as many reviews and a higher rating. Skip if you do not need WiFi, the Honeywell programmable units are quieter and more proven.
7. Aube by Honeywell Home TH106 Electric Heating 7-Day Programmable Thermostat
Aube by Honeywell Home TH106 Electric Heating 7-Day Programmable Thermostat
120V and 240V compatible
TRIAC silent switching
7-day programmable
+ The Good
- Very tight temperature regulation via TRIAC silent switching
- Compatible with 120V and 240V systems up to 4000W
- Battery-free backup retains program through outages
- 3-year warranty longer than most line-voltage thermostats
- Three temperature settings for Comfort Economy Vacation
- The Bad
- No backlight so it is hard to read in the dark
- Two-wire design cannot drive external relays
- Programming is not the most intuitive
- Some users notice slight wall staining from thermostat-generated heat
The Aube by Honeywell Home TH106 is the unsung hero of the line-voltage category. It uses TRIAC silent switching like the Honeywell Home RLV4305, but adds full 7-day programming and a 3-year warranty that is longer than anything else on this list. It also works on both 120V and 240V systems up to 4000W, which makes it a versatile pick if you have a mix of baseboards in the same home.
In daily use, the TH106 is genuinely silent. The TRIAC switching means there is no mechanical relay click when the heater cycles, which is a quality-of-life upgrade you do not fully appreciate until you have lived with a clicking thermostat for years. Combined with the 3-year warranty, that makes it the most confidence-inspiring pick in this roundup for buyers who care about long-term reliability.
The trade-offs are worth knowing. There is no backlight, so checking the temperature in the dark requires walking up to the unit. The two-wire design cannot drive external relays or contactors, so it is for direct connection to a resistive heater only. Programming takes some patience the first time, and the three preset modes (Comfort, Economy, Vacation) work better for some households than full custom 7-day scheduling. Some users also note slight wall staining over time, which is from the small amount of heat the thermostat itself generates during operation, not a defect.
If quiet operation and a long warranty are your top priorities, the TH106 is hard to beat. For most buyers, the TL8230 still edges it out because of the backlit display, but the TH106 is a worthy alternative with a 3-year warranty no other unit on this list can match.
For whom its good
Anyone who wants the quietest possible relay and a longer warranty than the rest of the category offers. Also a good fit if you have a mix of 120V and 240V baseboards in the same home, since the TH106 covers both.
For whom its bad
Skip if you need a backlit display, the TL8230 or TL7235 both have one. Skip if you want WiFi control, none of the Honeywell programmable line-voltage units have that.
What to Look for in a Smart Thermostat for Baseboard Heating
Buying a smart thermostat for baseboard heating is more constrained than for central HVAC, because the thermostat has to handle the same high voltage as the heater. Here are the four factors that matter most, based on the pain points we saw on r/homeautomation and r/smarthome during our research.
Voltage and load match
Check your heater label before buying anything. Most North American baseboards are 240V on a 20A breaker, but older homes and additions often run 120V baseboards. The thermostat you pick must be rated for the same voltage as your heater, and its amp rating must cover your heater’s draw. A 240V, 2000W baseboard draws about 8.3A, so any thermostat rated for 15A or 16A is fine. Going the other way, undersized thermostats can fail within months. The KING Hoot is the only multi-volt unit in this roundup, which is helpful if you have a mixed system.
Single-pole versus double-pole wiring
Single-pole thermostats break only one side of the circuit when off, which means the heater still has voltage present and the dial reads “off” but is not truly disconnected. Double-pole thermostats break both legs of the circuit and fully disconnect the heater. Code in some jurisdictions requires double-pole for new installations, and it is safer for service work. The KING Hoot above is double-pole, the Honeywell TL8230 and TL7235 are typically wired as single-pole for 240V use.
Smart features versus programmable
If you want WiFi, app, Alexa, HomeKit, or Google Home integration, your realistic options are Mysa or the KING Hoot, since the rest of this roundup is programmable but not WiFi-connected. Programmable thermostats like the TL8230 or RLV4305 still give you 5-2 or 7-day scheduling and accurate temperature control, just without remote app access. For many homeowners, a programmable line-voltage unit delivers 90 percent of the comfort and energy savings of a WiFi unit at a fraction of the per-room cost. If you are converting eight to ten rooms, the math favors programmable.
Neutral wire and box depth
WiFi line-voltage thermostats like Mysa and the KING Hoot need a neutral wire to power their radios continuously. Older homes often have only two wires (line and load) at the baseboard thermostat box, and adding a neutral can require an electrician. The Honeywell programmable line-voltage units in this roundup do not need a neutral, which is why they remain popular for retrofit installs. Also check your electrical box depth: the 4-wire models (TH115-A-12, TH115-A-240D-B, KING Hoot) need a deeper single-gang box than the 2-wire models.
Per-room cost for a whole-home conversion
This is the question Reddit users ask most, and no competitor roundup answers it well. Using mid-range pricing from our research, a Mysa V2 runs about 159 dollars per room, and a KING Hoot runs about 248 dollars per room. A Honeywell TL8230 runs about 49 dollars per room, and the RLV4305 runs about 49 dollars per room. For an 8-room home, that is the difference between roughly 400 dollars and 2,000 dollars. The smart features are real, but the cost difference is also real, and you should weigh whether you need WiFi in every room or only in the rooms you actively want to control remotely.
Energy savings you can actually expect
Honeywell claims up to 20 percent savings on heating bills versus a manual thermostat when you use the programming features consistently, and the precise temperature control on the RLV4305 and TH106 adds another 10 percent on top of that for some users. Mysa claims up to 26 percent with full geofencing and scheduling. Real-world savings depend heavily on your previous thermostat, your home insulation, and how aggressively you use scheduling. The honest range our team saw across Reddit users is 10 to 20 percent, which is meaningful on electric heating bills.
Frequently Asked Questions
What is the best smart thermostat for baseboard heaters?
The best smart thermostat for baseboard heaters depends on whether you want WiFi or just programmable control. For true WiFi with app control, the Mysa V2 and the KING K902-B Hoot are the main options. For programmable line-voltage control without an app, the Honeywell TL8230A1003 is the strongest all-around pick with 7-day programming, ±1°F control, and a soundproofed relay across more than 1,600 reviews.
What smart thermostat works with baseboard heat?
Only line-voltage thermostats rated for 120V or 240V work with electric baseboard heaters. That excludes Nest, Ecobee, and most WiFi thermostats because they are designed for 24V low-voltage HVAC systems. WiFi options that do work include Mysa V2 and the KING Hoot. Programmable non-WiFi options include the Honeywell TL8230, TL7235, TH115-A-12, TH115-A-240D-B, and the Aube TH106, all covered in this roundup.
Do I need a neutral wire for a smart baseboard thermostat?
It depends on the thermostat. WiFi line-voltage thermostats like Mysa and the KING Hoot need a neutral wire to power their WiFi radios continuously. Older homes often only have two wires at the baseboard thermostat box, which means a neutral wire may need to be pulled by an electrician. Honeywell programmable line-voltage thermostats like the TL8230 and RLV4305 do not require a neutral, which is why they remain the easiest retrofit option for older homes.
How much can you save with a smart thermostat on baseboard heat?
Based on manufacturer claims and Reddit user reports, a programmable line-voltage thermostat saves 10 to 20 percent on electric heating bills compared to a manual dial thermostat. WiFi thermostats with geofencing and active scheduling can push that higher, with Mysa claiming up to 26 percent. Real-world savings depend on insulation, your previous thermostat, and how consistently you use scheduling features.
What is the difference between line voltage and low voltage thermostats?
Line-voltage thermostats switch the same 120V or 240V power that runs the heater itself, so they wire directly into the heater circuit. Low-voltage thermostats switch a 24V control signal that tells a furnace or air handler what to do, and they require a common wire (C-wire) for power. Baseboard heaters need line-voltage thermostats because they do not have a furnace to receive a 24V signal. Trying to use a Nest or Ecobee on a baseboard heater will not work and can be a safety hazard.
Final Verdict
For most homeowners with electric baseboard heating in 2026, the Honeywell TL8230A1003 is the best overall choice. It handles 240V baseboards, supports 7-day programming, runs nearly silent, and has more than 1,600 reviews backing its reliability. If you are doing a whole-home conversion on a budget, the Honeywell Home RLV4305A1000 gives you the same silent TRIAC switching at less than half the price of a WiFi unit. If you specifically want app and voice control, the KING K902-B Hoot is the most accessible WiFi line-voltage thermostat on the market today.
The smartest first step is to flip the cover off your existing thermostat and check the wire count and voltage rating before you buy anything. Once you confirm whether you have 120V or 240V and whether a neutral is present, the choice between the seven units above becomes much easier. For more smart home heating ideas, our smart irrigation controller roundup covers similar WiFi retrofit decisions for outdoor systems, and our guide on how to clean baseboard heaters is worth a read before you swap thermostats, since a clean heater makes any new thermostat perform better.
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