Whether you’re trying to slash your energy bills, keep your feet toasty, or simply enjoy the convenience of controlling home temperature from a phone, the thermostat you pair with underfloor heating makes all the difference.
Unlike traditional radiators, floor‑mounted systems respond slower to temperature changes, so a smart thermostat that offers precise scheduling, zone control, and adaptive learning can prevent wasteful overshoot while delivering consistent comfort.
With so many models flooding the market, it’s easy to feel overwhelmed by features, compatibility questions, and price tags. In this guide we’ve tested and compared the top ten smart thermostats designed specifically for underfloor heating, so you can pick the perfect match for your home.
10 Best Smart Thermostats for Underfloor Heating
We’ve tested dozens of models to bring you the most reliable, energy‑saving thermostats that seamlessly control underfloor heating systems.
10. Nuheat nVent AC0055 Programmable Thermostat
The Nuheat nVent Signature thermostat brings radiant‑floor comfort to the modern smart home. Its 3½‑inch full‑color touchscreen makes programming a breeze, while the 7‑day schedule lets you set distinct temperatures for each day of the week.
Thanks to built‑in Wi‑Fi, you can adjust the heat from any iOS or Android device or through a web browser, and the thermostat syncs effortlessly with Alexa, Google Assistant, IFTTT, Control4, Crestron, Elan and RTI.
Dual‑voltage support (120 V / 240 V) means it works with any floor‑heating cable, and the integrated Class A GFCI adds an extra layer of safety. An extra OJ Electronics floor‑heating temperature sensor provides precise feedback, ensuring consistent warmth in kitchens, bathrooms, living rooms, bedrooms, or hallways.
| Spec | Detail |
|---|---|
| Touchscreen | 3½ in color LCD |
| Voltage Compatibility | 120 V / 240 V |
| Wi‑Fi | 2.4 GHz, WPA2 |
| App Support | iOS, Android, web browser |
| Smart Home Integration | Alexa, Google Assistant, IFTTT, Control4, Crestron, Elan, RTI |
| Sensors Included | OJ Electronics floor‑temperature sensor |
| Safety | Built‑in Class A GFCI |
| Programming | 7‑day schedule, 1‑hour increments |
| Power Supply | 24 V AC transformer (included) |
Best For: Homeowners who want precise, app‑controlled radiant floor heating with full smart‑home compatibility.
Pros
- Seamless integration with major voice assistants and automation platforms.
- Dual‑voltage and built‑in GFCI provide versatile, safe installation.
- Intuitive touchscreen plus extra temperature sensor for accurate comfort.
Cons
- Requires a stable 2.4 GHz Wi‑Fi network; 5 GHz not supported.
- Installation may need a qualified electrician for dual‑voltage wiring.
9. Mysa Smart Thermostat LITE
Mysa Smart Thermostat LITE brings Wi‑Fi intelligence to 120‑240 V electric baseboard, wall and convector heaters. The sleek, minimalist unit replaces a standard line‑voltage thermostat in a simple 4‑wire, single‑pole setup—no electrician required.
Through the free Mysa app you can set daily schedules, receive monthly runtime reports, and adjust temperature from anywhere, cutting heating bills by up to 26 %. Voice control works with Apple HomeKit/Siri, Amazon Alexa, and Google Assistant, so you can change the heat hands‑free.
Built to UL standards with quality components, it’s backed by a 2‑year warranty and supported by a North‑American team dedicated solely to thermostats—ideal for garages, workshops, sunrooms, or any hard‑to‑heat addition.
| Specification | Detail |
|---|---|
| Voltage Compatibility | 120 V, 208 V, 240 V (single‑pole) |
| Power Type | Line‑voltage (electric baseboard, fan‑forced, wall, convector) |
| Wi‑Fi | 2.4 GHz, remote access via app |
| Smart Home Integration | Apple HomeKit, Amazon Alexa, Google Assistant |
| Installation | 4‑wire DIY, ~15 min |
| App | Free forever, scheduling, runtime reports |
| Warranty | 2 years |
| Certifications | UL listed |
Best For – Homeowners who want effortless, Wi‑Fi‑controlled heating for garages, workshops, or rooms with electric baseboard heaters.
Pros
- Easy DIY install – 4‑wire, 15‑minute setup, no electrician needed.
- Free forever app – Full remote control, scheduling, and reports without subscriptions.
- Smart‑home ready – Works with HomeKit, Alexa, and Google Assistant for voice control.
Cons
- Single‑pole only – Cannot replace a double‑pole thermostat.
- Requires 4‑wire wiring – Older single‑wire installations need upgrade.
8. Sensi Smart Thermostat 16A
The Smart Home Floor Heating Thermostat brings effortless climate control to any underfloor heating system. Its bright LED display stays legible day and night, letting you monitor and fine‑tune temperatures at a glance.
Dual sensors track both ambient air and floor heat, delivering even distribution while preventing hot spots. Smart functions such as Child Lock, Power‑Off Memory, and adjustable hysteresis (1‑10 °C) add safety and efficiency, and the 0.5 °C accuracy guarantees a consistently comfortable environment.
The compact 86 × 90 mm panel fits neatly on any wall, and the flame‑retardant PC housing provides reliable high‑temperature protection. Installation is straightforward: wall‑mount the unit, connect the simple wiring, and you’re ready to enjoy precise, energy‑smart heating without professional help.
| Specification | Detail |
|---|---|
| Input Voltage | AC 85‑250 V |
| Maximum Current | 16 A |
| Display | LED, night‑visible |
| Temperature Accuracy | ±0.5 °C |
| Hysteresis Adjustment | 1‑10 °C |
| Sensors | Internal + External |
| Dimensions (W × H × D) | 86 × 90 × 15 mm |
| Material | PC flame‑retardant |
| Power‑Off Memory | Yes |
| Child Lock | Yes |
Best For – Homeowners seeking precise, user‑friendly control of electric underfloor heating without professional installation.
Pros
- Dual‑sensor design ensures even heat distribution and prevents overheating.
- Smart safety features (Child Lock, Power‑Off Memory) add peace of mind.
- Easy wall‑mount installation with clear, night‑visible LED display.
Cons
- Limited to electric underfloor systems; not compatible with hydronic setups.
- No Wi‑Fi or app integration for remote control.
7. EcoSmart EHC15 Smart Thermostat
The Smart Electric Floor Heating Thermostat blends sleek, white styling with intelligent heating control. Its bright LED screen lets you read the current temperature at a glance—day or night—while the intuitive interface makes adjustments effortless.
Thanks to built‑in child‑lock and power‑failure memory, the unit stays safe and remembers your preferred settings even after an outage. The adjustable hysteresis (1 – 10 °C) and 0.5 °C temperature accuracy keep the floor warm without wasteful overshoot, and dual internal/external sensors guarantee even heat distribution.
Designed for a hassle‑free fit, the thermostat works with most underfloor systems and supports a 16 A load across 85 V‑250 V AC, making it a perfect upgrade for modern homes seeking both comfort and style.
| Specification | Detail |
|---|---|
| Input Voltage | AC 85 V – 250 V |
| Maximum Current | 16 A |
| Display | LED screen |
| Temperature Accuracy | ±0.5 °C |
| Hysteresis Adjustment | 1 – 10 °C |
| Safety Features | Child lock, power‑failure memory |
| Sensors | Internal & external temperature sensors |
| Installation | Easy, compatible with most underfloor heating systems |
| Color | White |
Best For – Homeowners who want precise, safe, and stylish control of their underfloor heating system.
Pros
- Precise control with 0.5 °C accuracy and adjustable hysteresis.
- Safety & convenience via child lock and automatic memory after power loss.
- User‑friendly LED display visible day and night.
Cons
- Requires a compatible 16 A underfloor system; may not suit low‑power setups.
- No built‑in Wi‑Fi; remote control requires an external smart hub.
6. Nuheat Signature Programmable Thermostat
Nuheat’s Signature Programmable Dual‑Voltage Thermostat puts radiant floor heating at your fingertips. Its 3½‑inch full‑color touchscreen makes scheduling a breeze, while Wi‑Fi connectivity lets you adjust temperature from any iOS, Android, or web app—perfect for busy households.
Seamlessly integrate with Alexa, Google Assistant, IFTTT, Control4, Crestron, Elan, or RTI for voice‑controlled comfort.
Built for safety, the unit handles both 120 V and 240 V floor‑heating cables and includes Class A GFCI protection, ensuring reliable operation in any room—from cozy kitchens to heated bathrooms and inviting living spaces.
| Key Spec | Detail |
|---|---|
| Display | 3.5″ color touchscreen |
| Connectivity | Wi‑Fi (iOS, Android, web) |
| Smart Home Compatibility | Alexa, Google Assistant, IFTTT, Control4, Crestron, Elan, RTI |
| Voltage Support | 120 V / 240 V |
| Safety | Built‑in Class A GFCI |
| Programming | 7‑day schedule |
| App Control | Mobile app & browser interface |
| Dimensions | 5.2″ × 5.2″ × 1.2″ |
| Power Supply | 24 V AC adapter |
Best For – Homeowners seeking effortless, smart‑controlled radiant floor heating for any room.
Pros
- Full smart‑home integration – works with all major voice assistants and automation platforms.
- Dual‑voltage flexibility – compatible with both 120 V and 240 V heating circuits.
- Intuitive touchscreen – quick navigation and 7‑day programmable schedules.
Cons
- Requires Wi‑Fi – performance depends on a stable home network.
- Higher upfront cost – premium features may exceed budget of basic thermostats.
5. VEVOR 50SQFT Self-Adhesive Floor Heating Mat
The VEVOR Self‑Adhesive Mesh Floor Heating Mat delivers consistent, whisper‑quiet warmth under tile, stone, laminate or vinyl.
Its ultra‑thin, pre‑assembled mesh slides easily into tight spaces and can be trimmed (grid only) to fit around fixtures, while the integrated 15 A programmable thermostat with GFCI protection lets you set temperatures from 41 °F to 98.6 °F (5 °C‑37 °C) and schedule up to four daily events for each of seven days.
Dual‑sensor monitoring tracks both air and floor temperature, ensuring precise comfort and energy savings. A dual‑layer aluminum shield with grounding wire prevents signal interference and guarantees even heat distribution.
The included installation monitor verifies cable integrity before concrete is poured, saving time and avoiding costly rework. With a low 12 W/ft² draw, this all‑in‑one kit is perfect for DIY enthusiasts and professionals seeking reliable, energy‑efficient underfloor heating for wet or dry rooms.
| Spec | Detail |
|---|---|
| Coverage | 50 sq ft |
| Voltage | 120 V |
| Power Density | 12 W/ft² |
| Thermostat Range | 41 °F – 98.6 °F (5 °C – 37 °C) |
| Scheduling | 7‑day, 4 events/day |
| Sensors | Air & floor dual sensors |
| Protection | GFCI, aluminum shield, grounding wire |
| Cuttable Area | Grid only (cables intact) |
| Included | Heating mat, thermostat, floor sensor, installation guide |
Best For: Renovating bathrooms, kitchens, or any tiled/stone surface where slim, programmable underfloor heating is desired.
Pros
- Smart thermostat with full scheduling and dual‑sensor accuracy.
- Ultra‑thin, pre‑assembled mat fits tight corners and cuts to shape without damaging cables.
- Built‑in monitoring system verifies cable performance before concrete pour.
Cons
- Cables cannot be cut, limiting custom layout beyond the grid.
- Installation requires careful adherence to grounding and shielding guidelines for optimal safety.
4. Sensi ST55 Smart Thermostat
The Sensi Smart Thermostat ST55 brings a century of HVAC expertise into a sleek, user‑friendly device that fits right where your old thermostat lived.
With built‑in Wi‑Fi and a dedicated mobile app, you can adjust temperature from anywhere, set flexible schedules, and receive real‑time usage reports that typically shave about 23 % off your heating and cooling bills.
Privacy‑focused design means Sensi never sells your personal data, and the intuitive step‑by‑step installation guide, complete with a built‑in level, gets you up and running without a dedicated C‑wire in most homes.
It’s compatible with most HVAC systems, so you won’t need major rewiring, and the remote access lets you fine‑tune comfort on the fly. Voice control works seamlessly with Alexa, while smart maintenance alerts keep your system humming efficiently.
Energy‑Star certified and designed to look and feel like a traditional thermostat, the ST55 offers a hassle‑free upgrade that blends performance with peace of mind.
Key Specs
| Spec | Detail |
|---|---|
| Model | Sensi Smart Thermostat ST55 |
| Wi‑Fi | 802.11 b/g/n (2.4 GHz) |
| Voice Assistant | Works with Alexa |
| Energy Star Certified | Yes |
| Mobile App | iOS & Android |
| Privacy Protection* | No selling of personal data |
| Installation | DIY, built‑in level, no C‑wire needed in most cases |
| Estimated Savings* | ~23 % on HVAC energy |
| Smart Maintenance | Usage reports, alerts, filter reminders |
Best For: Homeowners who want easy DIY installation, strong privacy, and noticeable energy savings.
Pros
- Privacy‑first: Sensi never sells your data.
- Simple DIY install: Built‑in level and app guidance eliminate the need for a C‑wire in most homes.
- Energy savings: ENERGY STAR‑certified with scheduling and remote control can cut HVAC use by ~23 %.
Cons
- May require a C‑wire for some older HVAC systems.
- Advanced scheduling features are limited compared to premium competitors.
3. Honeywell T9 Programmable Thermostat
The 7‑Day Programmable Thermostat is engineered for radiant under‑floor heating, delivering precise, energy‑smart comfort without the need for an electrician. It auto‑detects 120 V or 240 V line voltage, so you can plug it straight into a standard outlet and start programming in minutes.
Dual sensors—one on the floor, one in the air—continuously balance surface and room temperatures, preventing hardwood cracks and eliminating the “hot floor, cold room” dilemma.
A built‑in Class A GFCI with self‑test adds continuous leak protection, while the LED backlit display offers crystal‑clear readouts even in a dark bedroom.
With seven‑day scheduling, you can set wake‑up, away, home, and bedtime periods, letting the unit pre‑heat or lower the temperature automatically, which translates into noticeable savings on your utility bill.
| Specification | Detail |
|---|---|
| Voltage | Auto‑adaptive 120 V / 240 V |
| Programming | 7‑day, 4‑period daily schedule |
| Sensors | Dual (Floor + Air) |
| Safety | Class A GFCI with self‑test |
| Display | LED backlit, easy‑read |
| Compatibility | Radiant mats, cables, select heat pumps |
| Installation | Tool‑free, no wiring changes |
| Power Rating | 150 W max |
| Dimensions (L×W×H) | 5.2 × 3.0 × 1.2 inches |
| Warranty | 2 years limited |
Best For: Homeowners with radiant floor heating who want plug‑and‑play control, safety, and energy savings.
Pros
- Auto‑adapts to 120 V/240 V circuits – no rewiring needed.
- Dual floor/air sensors prevent overheating and keep rooms evenly warm.
- Built‑in Class A GFCI provides continuous shock protection.
Cons
- Not an OEM‑authorized Nvent unit; may lack brand‑specific integrations.
- Limited to 4 programmable periods per day; power users may need more granularity.
2. 6iE Smart WiFi Thermostat
The 6iE Smart WiFi Thermostat redefines comfort for electric underfloor heating. Its ultra‑thin chassis blends seamlessly into any room while the world‑first smartphone‑style touchscreen lets you scroll, swipe, and set schedules with a tap.
Powered by Warmup’s SmartGeo technology, the paired MyHeating app learns your routine, detects when you’re away, and pre‑heats the house just in time for your arrival—cutting waste and shaving up to 25 % off energy bills.
No programming is needed; the thermostat automatically maintains the perfect temperature, day or night. Seamless integration with IFTTT means you can link the 6iE to Alexa, Google Home, or other smart devices, turning your heating into a true part of your connected home ecosystem.
Whether you’re at work, on the go, or cozy at home, the 6iE ensures warmth is always exactly where you need it, when you need it.
| Specification | Detail |
|---|---|
| Compatibility | Electric underfloor heating systems |
| Connectivity | Wi‑Fi (2.4 GHz), IFTTT, Alexa, Google Home |
| Control Interface | 3.5‑inch capacitive touchscreen |
| App Integration | MyHeating (iOS & Android) – SmartGeo |
| Temperature Range | 5 °C – 30 °C (41 °F – 86 °F) |
| Power Supply | 24 V DC (via transformer) |
| Dimensions (HxWxD) | 60 mm × 120 mm × 15 mm |
| Operating Voltage | 230 V AC |
| Energy Savings Claim | Up to 25 % reduction on heating bills |
| Installation | Ultra‑thin wall‑mount, no extra wiring |
Best For – Homeowners with electric underfloor heating who want effortless, app‑driven temperature control and energy savings.
Pros
- SmartGeo auto‑adjusts heating based on your location, reducing waste.
- Intuitive touchscreen eliminates complex programming.
- IFTTT compatibility expands smart‑home integration.
Cons
- Requires a stable 2.4 GHz Wi‑Fi network; performance may drop on crowded networks.
- No built‑in battery backup, so power outages reset schedules.
1. Honeywell Lyric T9 Programmable Thermostat
The Programmable Thermostat for house radiant under‑floor heating delivers reliable, energy‑saving comfort for any home.
Designed for both 120 V and 240 V line voltages, it can handle up to 15 A (1 800 W @120 V or 3 600 W @240 V) while continuously monitoring for ground‑fault leakage with a built‑in Class A GFCI.
Dual sensors—one in the floor and one in the air—provide precise temperature control, and the large back‑lit LCD makes settings easy to read day or night.
A 7‑day programmable schedule lets you tailor heating cycles for each room, while the ON/STANDBY switch simplifies seasonal shutdowns. The thermostat is cETL‑listed, UL‑approved, and backed by a 5‑year limited warranty, ensuring safety and peace of mind for modern radiant‑floor installations.
| Specification | Detail |
|---|---|
| Input Voltage | 120 V / 240 V, 50‑60 Hz |
| Max Current | 15 A |
| Power Rating | 1 800 W (120 V) / 3 600 W (240 V) |
| Sensors | Floor & Air |
| GFCI Type | Built‑in Class A, self‑test |
| Display | 7‑segment LCD with backlight |
| Programming | 7‑day schedule, 1‑hour increments |
| Safety Standards | CAN/CSA‑C22.2 No. 144.1, cETL Listed, UL listed |
| Warranty | 5‑year limited |
| Load Capacity | 15 A |
Best For – Homeowners seeking safe, programmable control for 120 V or 240 V radiant floor heating systems.
Pros
- Dual floor/air sensing delivers accurate, consistent warmth.
- Integrated Class A GFCI protects against electric shock and fire hazards.
- 7‑day programmable schedule reduces energy use and heating costs.
Cons
- GFCI must be manually tested after installation; may add a step for DIY users.
- Requires compatible wiring and a dedicated 15 A circuit; not a plug‑and‑play retrofit for all existing setups.
Buying Guide
Smart thermostats for underfloor heating must balance precise temperature control, seamless connectivity, and robust construction. Prioritizing sensor accuracy, integration options, and long‑term reliability will help you maximize comfort while cutting energy costs.
Quality and Build
The thermostat’s core components—sensor accuracy, material quality, and construction—directly affect heating performance and energy savings.
Look for models with high‑precision temperature probes, robust housings resistant to moisture, and certifications such as CE or UL, ensuring reliable operation over years of continuous underfloor heating cycles and low maintenance requirements throughout its lifespan.
Smart Features and Compatibility
A smart thermostat should integrate seamlessly with your home automation ecosystem, supporting Wi‑Fi, Bluetooth, or Zigbee protocols and popular voice assistants like Alexa, Google Assistant, and Siri.
Essential features include programmable schedules, geofencing, and real‑time energy reports, allowing you to fine‑tune underfloor heating zones for comfort and cost efficiency while also providing remote control access.
Durability and Warranty
Underfloor heating systems run continuously, so the thermostat must endure temperature fluctuations and occasional humidity. Choose units with sealed circuitry and IP‑rated enclosures to guard against moisture ingress.
A solid warranty—ideally three to five years—signals manufacturer confidence and protects you from premature failures, reducing long‑term ownership risk and ensuring consistent performance over time throughout the year.
Value for Money
Price alone doesn’t determine suitability; evaluate the feature set relative to cost. Mid‑range models often deliver essential smart controls and reliable sensors without premium markup, while high‑end units may add advanced analytics or multi‑zone management.
Balance upfront expense against potential energy savings and convenience to achieve the best return on investment for your household over time.
Customer Reviews and Support
User feedback reveals real‑world reliability, ease of installation, and app responsiveness. Prioritize thermostats with consistently high ratings and detailed reviews that mention underfloor heating specifically.
Equally important is responsive customer service—live chat, comprehensive manuals, and firmware updates—to resolve issues quickly and keep the system performing optimally throughout seasonal changes and software upgrades for lasting comfort.
Choosing a thermostat that excels across these factors ensures reliable, efficient heating and a smoother smart‑home experience.
Frequently Asked Questions
Which smart thermostat works best with electric underfloor heating?
The Nest Learning Thermostat is a top choice; it supports 24 V line‑voltage systems via an external relay, offers precise temperature scheduling, learns your habits, and integrates with Alexa, Google Assistant, and Apple HomeKit for seamless control.
Can a smart thermostat be used with hydronic (water‑based) underfloor heating?
Yes. Models such as the Ecobee 4, Tado Smart Radiator Thermostat, and Honeywell Evohome work with 3‑wire or 5‑wire water‑based systems, using zone valves or pump control. Ensure the thermostat supports line‑voltage output or add a compatible relay.
What features should I look for when choosing a smart thermostat for underfloor heating?
Key features include line‑voltage compatibility, multi‑zone control, adaptive scheduling, remote app access, voice‑assistant integration, energy‑usage reports, and easy installation with optional external relay. A clear LCD and Wi‑Fi reliability are also important for consistent performance.
How does a smart thermostat improve energy efficiency with underfloor heating?
It continuously monitors floor temperature, adjusts output to maintain setpoints, and learns occupancy patterns to reduce heating when rooms are empty. Remote scheduling and real‑time usage data let you fine‑tune settings, cutting waste and lowering bills without sacrificing comfort.
Conclusion
Choosing the right smart thermostat for underfloor heating hinges on a few core principles: seamless integration with your existing heating system, precise temperature control, and intuitive connectivity that fits your lifestyle.
Prioritize models that offer robust scheduling, remote access via smartphone apps, and compatibility with popular voice assistants, ensuring you can fine‑tune comfort while maximizing energy savings.
Look for units that support zone management if you have multiple heated areas, and verify that they can communicate reliably with your boiler or heat pump. By focusing on these features, you’ll secure a thermostat that not only enhances comfort but also delivers long‑term efficiency and convenience.
