Best Thermostats for Underfloor Heating: Top Picks for 2025
Choosing a thermostat tailored for underfloor heating ensures comfort, energy efficiency, and reliable safety. This guide profiles five reliable options, covering dual voltage support, floor and air sensing, smart connectivity, and built-in safety features. Whether you have a radiant mat, tile, or laminate floor, these thermostats are designed to regulate floor temperatures smoothly and safely. The selections below emphasize compatibility with 120V/240V systems, easy installation, and modern control options.
| Product | Brand | Key Benefit | Voltage |
|---|---|---|---|
| BOWSEN Programmable Thermostat | BOWSEN | Dual sensing, built-in GFCI, safe for wet and dry areas | 120/240V |
| SunTouch SunStat ConnectPlus | SunTouch | Remote access with floor and air sensing, robust scheduling | 120/240V |
| SASWELL Programmable Thermostat | SASWELL | 5+2 programming, dual mode floor/room control | 120/240V |
| 6iE Smart WiFi Thermostat | Warmup | SmartGeo location-based comfort, smartphone touchscreen | 120/240V |
| Honeywell TH115-AF-GA/U | Honeywell | 7-day programmable line-voltage with floor sensor | 120/240V |
BOWSEN Programmable Thermostat For Underfloor Heating
The BOWSEN thermostat supports both 120VAC and 240VAC, with a maximum current of 15A and a maximum power of 1800W at 120V or 3600W at 240V. It integrates a floor sensor and an air sensor for accurate temperature regulation. A built-in GFCI protects users from electric shock and reduces fire risk in underfloor heating installations. The device includes a GFCI test function and safety guidance for trip scenarios, helping operators verify proper operation after installation.
Designed for radiant floor systems, this model emphasizes safety and compliance, including cETL listed certification. The dual-sensing capability helps maintain comfortable floors and ambient air temperatures, optimizing energy use. If the GFCI trips, technicians should check for leakage and wire integrity before reactivating the system. For households with tile or stone floors, the floor protection modes help prevent overheating and damage to sensitive materials.
MAXKOSKO WiFi Smart Thermostat For Electric Floor Warming
The MAXKOSKO thermostat offers Wi-Fi control with a touchscreen LED display and compatibility with 120V/240V systems. It supports remote control via a smartphone app and is compatible with voice assistants like Alexa and Google Assistant for hands-free operation. The device is designed for easy installation on walls and works with most underfloor heating configurations, enabling precise scheduling to maximize comfort and energy savings.
Key advantages include convenient programming to avoid manual adjustments, energy-saving features, and reliable integration with popular smart home ecosystems. The thermostat’s universal compatibility makes it a strong option for homes updating older floor-heating systems or integrating with existing smart hubs. Users should ensure the line-voltage load aligns with the system’s wattage and confirm compatibility with their floor type before purchasing.
SunTouch SunStat ConnectPlus Smart Thermostat
The SunStat ConnectPlus provides a 4.3″ touchscreen, remote access, and a 7-day programmable schedule. It features floor and air sensing control, along with energy monitoring and weather display options. Smart Start technology automatically adjusts to ensure the floor is warm at the scheduled time. It supports voice control via Alexa and Google Assistant, and offers email alert notifications for system events or anomalies.
With a focus on advanced control and user experience, this thermostat is well-suited for larger homes or spaces where precise timing matters. The device’s floor protection settings help safeguard various flooring materials, while its weather-aware features help optimize energy use. Installation requires attention to wire routing and sensor placement for best performance.
SASWELL Programmable Thermostat For Electric Floor Heating
The SASWELL thermostat supports 120V and 240V across a 16A rating, with 5+2 programmable scheduling. It includes a floor sensor and features dual-mode operation: Floor Mode, Room Mode, or a combined Dual Mode for integrated control of floor surface temperature and ambient air. This makes it versatile for protecting delicate flooring while maintaining overall room comfort.
Ideal for settings requiring reliable scheduling and precise floor protection, SASWELL emphasizes energy efficiency through weekday/weekend programming. The device’s design aims to simplify installation and operation, making it suitable for home renovations or new builds. As with any floor-heating controller, proper sensor placement and wiring are essential for optimal performance and safety.
6iE Smart WiFi Thermostat For Underfloor Heating
The 6iE thermostat uses Warmup’s SmartGeo technology to anticipate heating needs based on your location, reducing energy waste. It includes a smartphone touchscreen, enabling convenient control from anywhere via the MyHeating app. The device is designed for use with electric underfloor heating systems and emphasizes energy savings through intelligent control and remote access.
With a ultra-thin form factor and a sophisticated user interface, 6iE offers a forward-looking solution for tech-savvy homeowners seeking seamless integration with smart home ecosystems. As with many Wi-Fi thermostats, performance depends on stable network connectivity and proper sensor calibration. Consider pairing with a compatible voice assistant for hands-free adjustments.
Honeywell TH115-AF-GA/U Radiant Heating Thermostat
Honeywell’s TH115-AF-GA/U is a 7-day programmable line-voltage thermostat designed for radiant floor heating. It includes a floor sensor and a built-in GFCI, aligning with safety requirements for underfloor installations. The device is optimized for electric floor heating systems and offers a familiar control experience for homeowners using Honeywell ecosystem components.
As a classic option, it provides dependable scheduling with floor-temperature protection. The lack of smart home features may be a trade-off for users seeking straightforward, reliable control without additional connectivity. Ensure compatibility with your floor type and sensor placement to maximize comfort and safety.
Buying Guide
Key considerations when choosing a thermostat for underfloor heating include voltage compatibility, sensor integration, and safety features. Dual-voltage models (120V/240V) provide flexibility for renovations or multi-zone systems. Look for floor and air sensing capabilities to maintain consistent comfort while protecting flooring materials from overheating.
Safety features are essential. Built-in GFCI or protective circuits reduce electric shock risk in damp environments and help prevent electrical fires. Consider models with easy-to-use interfaces, remote access, and clear testing procedures to verify safe operation after installation.
Smart features can add convenience and energy savings. Wi‑Fi connectivity, smartphone apps, and voice assistant support enable remote control and scheduling. Some thermostats include SmartGeo or location-based adjustment, which can trim energy use by anticipating needs as you approach home.
Installation considerations include sensor placement (floor vs air) for accurate readings, compatibility with floor coverings (tile, stone, laminate), and whether the thermostat requires a dedicated sub-base or a wall box. For homes with multiple zones, ensure the chosen model supports multi-zone control or can be paired with a compatible hub. Finally, verify regulatory compliance and safety certification relevant to your region.