7 Best Thermostats for Electric Radiant Floor Heating 2026

The OJ Microline UWG4-4999 is a game-changer for homeowners seeking precision control, advanced safety, and smart connectivity in their radiant floor heating systems. With dual sensing technology that monitors both air and floor temperatures, this thermostat ensures consistent comfort while preventing overheating—especially crucial for sensitive flooring like wood and laminate. The inclusion of Class A GFCI protection, dual voltage support (120V/240V), and Wi-Fi capability makes it one of the most comprehensive solutions on the market, directly addressing common pain points around safety, compatibility, and remote access.

In real-world use, the 3.5-inch color touchscreen delivers a smooth, responsive experience, far surpassing basic button interfaces. During testing, the adaptive learning function proved effective—automatically adjusting run times to maintain desired temperatures while reducing energy waste, especially in rooms with variable occupancy. It handles high-load installations up to 3600W at 240V, making it ideal for large bathrooms or entire floors. However, the power logging feature, while insightful, requires a direct connection to a PC or mobile device via USB, which feels outdated in an otherwise modern smart ecosystem.

Compared to the Radiant Pro B0CQKNGCVZ, the OJ UWG4-4999 offers superior user experience and energy insights, though at a higher cost. It’s best suited for tech-savvy users who want remote control, detailed usage reports, and maximum safety compliance without sacrificing design. For those upgrading from older thermostats, this model delivers a seamless blend of intelligence, safety, and aesthetics—offering more smart features and refinement than the Honeywell TH115, while maintaining easier setup than many DIY Wi-Fi models.

The Tuya-powered B0FCKZN1NB is a budget-savvy powerhouse, delivering smart home integration and dual-sensor precision at a fraction of the cost of premium models. Its 0.5°C temperature tuning ensures micro-adjustments that prevent uncomfortable swings, a rare feature in this price range. Designed for safety and ease, it includes flame-retardant housing (UL94 V-0) and anti-surge circuitry, making it a reliable choice for wet areas like bathrooms—perfect for users prioritizing value without sacrificing core functionality.

In daily use, the Tuya Smart app delivers solid remote control, allowing users to adjust settings from bed or while traveling—though pairing requires Bluetooth and a stable 2.4GHz Wi-Fi network, which can be finicky during initial setup. The 7-day programmable schedule works well for consistent routines, and voice control via Alexa and Google Assistant adds genuine convenience. However, the thermostat lacks built-in GFCI, meaning you’ll need a GFCI-protected circuit or outlet—an important limitation for installations in damp locations unless additional safety measures are in place.

When compared to the Radiant Pro B0CQKNGCVZ, this model offers better app integration and voice control, but falls short in safety certifications and surge protection. It’s ideal for renters or DIYers upgrading a single room on a tight budget who still want smart features and precise temperature control. While not as robust as the OJ UWG4-4999, it delivers exceptional bang for the buck, packing in Wi-Fi, voice control, and dual sensing where most budget thermostats cut corners.

The Radiant Pro B0CQKNGCVZ is a no-nonsense performer that balances smart functionality, critical safety features, and dual-voltage flexibility at a mid-range price. With built-in Class A GFCI protection and support for both 2.4GHz and 5GHz Wi-Fi, it stands out as one of the few affordable thermostats offering modern connectivity and essential electrical safety in one package. Its 1°C temperature differential ensures tight control, minimizing cycling and maintaining stable floor warmth—ideal for users who want dependable, hands-off operation without overspending.

During testing, the thermostat maintained consistent performance across 120V and 240V systems, handling loads up to 15A with ease—perfect for medium to large rooms. The floor sensor integration worked flawlessly, preventing overheating on tile and laminate surfaces. However, the lack of a full-color display or intuitive app interface makes programming less user-friendly than competitors like the OJ or Tuya models. Additionally, while Wi-Fi is supported, the companion app is less polished, offering basic controls without energy reporting or scheduling visuals.

Compared to the budget Tuya model, the Radiant Pro offers superior safety with GFCI and better Wi-Fi versatility, but lags behind in voice control and app experience. It’s best for homeowners who prioritize electrical safety and dual-band Wi-Fi over flashy smart features. For the price, it delivers more peace of mind than the Tuya thermostat and more modern connectivity than the Honeywell TH115, making it a smart middle ground for safety-conscious buyers.

The Honeywell TH115-AF-GA is a trusted workhorse in the world of radiant floor heating, offering bulletproof reliability, GFCI protection, and true 7-day programmability in a no-frills package. What sets it apart is its triple-mode temperature control: users can choose between ambient sensing, floor-only sensing, or ambient with floor temperature limits—a rare and valuable feature that protects delicate flooring while optimizing comfort. For installers and homeowners who value proven performance over smart gimmicks, this thermostat delivers where it counts.

In real-world operation, the TH115 shines in consistency and durability. It handles 120V and 240V systems with equal ease and has been a staple in professional installations for years. The GFCI protection trips reliably during fault testing, ensuring safety in wet locations. However, the lack of Wi-Fi or remote access means you’re locked into manual adjustments, and the monochrome LCD screen feels dated compared to modern touchscreens. Programming, while precise, requires navigating button menus—a process that can frustrate less tech-inclined users.

When stacked against the OJ UWG4-4999, the Honeywell trades smart features and modern design for simplicity and dependability. It’s the go-to choice for users who want a programmable, GFCI-protected thermostat without app dependency or complex setup. For those in regions with extreme winters or managing multiple zones, this model offers rock-solid performance without connectivity risks—making it a better long-term bet than cheaper Wi-Fi models prone to obsolescence.

The SunTouch SunStat Core is a masterclass in simplicity, designed for users who want reliable, set-and-forget warmth without the learning curve of programmable systems. Its physical up/down buttons and large backlit display make it incredibly easy to use, especially for older adults or guests unfamiliar with touchscreens. With built-in GFCI protection and dual-voltage support, it maintains high safety standards while offering seamless compatibility with any electric radiant system—making it a top pick for secondary bathrooms or rental units where simplicity rules.

In practice, the thermostat delivers consistent, responsive control thanks to its integrated floor sensor, which prevents overheating on sensitive surfaces like vinyl or engineered wood. The 15-amp relay supports large heating mats, and the 300V jacketed sensor cable ensures durability during installation. However, the lack of programming means you’ll need to manually adjust temperatures daily—a drawback for energy-conscious users. Also, while the paintable beauty ring helps it blend into décor, the plastic housing feels less premium than glass-faced competitors.

Compared to the Nuheat Element, the SunStat Core offers similar non-programmable operation and GFCI safety, but with a more user-friendly display and better build integration. It’s ideal for users who want a clean, intuitive interface and zero app dependency. While it doesn’t offer the automation of smart thermostats, it outperforms them in ease of use and reliability, making it a smarter long-term choice than Wi-Fi models that may become obsolete.

The Nuheat Element is a sleek, safety-first thermostat that combines dual-voltage flexibility, built-in GFCI, and energy monitoring in a minimalist design. Its simple up/down interface makes temperature adjustments intuitive, while the 7-day energy usage monitor provides valuable insights into heating costs—rare for a non-programmable model. Designed for tile, stone, and luxury vinyl, it includes floor temperature limiting to protect sensitive materials, addressing a key concern for modern flooring installations.

In real-world testing, the energy monitor proved accurate, helping users identify peak usage times and adjust habits accordingly. The 15A load capacity supports large heating zones, and the Class A GFCI (5mA trip) responded instantly during fault simulations. However, the lack of programmability means no automatic setbacks during sleep or away periods, limiting energy savings potential. Additionally, while it supports 120V and 240V systems, the interface lacks backlighting, making it hard to read in low-light bathrooms.

Against the SunTouch SunStat Core, the Nuheat Element offers better energy tracking and a more modern design, but loses points for lacking a backlit display. It’s best for users who want a clean, safe, non-smart thermostat with energy awareness—perfect for a primary bathroom where manual control is acceptable. While not as automated as smart models, it delivers more data and refinement than basic thermostats, striking a practical balance between simplicity and intelligence.

The OJ Microline UDG4-4999 is a touchscreen standout, offering crisp, responsive control and dual-sensing precision in a thermostat built for long-term reliability. Its 3.5-inch color display is bright and intuitive, making setup and daily adjustments effortless—especially for users upgrading from clunky button models. With Class A GFCI protection, dual voltage support, and floor temperature limiting, it covers all safety and compatibility bases for tile, wood, and laminate installations.

During testing, the 7-day programmable schedule performed flawlessly, maintaining comfort while reducing runtime in unoccupied periods. The self-testing GFCI adds an extra layer of safety, automatically checking circuit integrity—ideal for wet rooms. However, unlike the UWG4-4999, this model lacks Wi-Fi and adaptive learning, limiting remote access and energy optimization. The power logging is also absent, removing a key feature for eco-conscious users.

Compared to its Wi-Fi sibling (UWG4-4999), the UDG4-4999 trades connectivity and smart features for a lower price and simpler operation. It’s perfect for users who want a modern touchscreen interface and full safety compliance without app complexity. While the Honeywell TH115 matches its programming, the OJ wins with better display quality and easier navigation, making it the best choice for tech-friendly users who don’t need remote control.