10 Best Under Tile Heating System 2026 in the United States

The SunTouch ConnectPlus WarmWire is an electric under-tile heating system designed to warm floors up to 100 square feet, making it suitable for bathrooms, kitchens, entryways, and similar spaces. It uses a 240-volt heating cable spaced at 3 inches to spread heat evenly beneath tile, stone, wood, or laminate floors. Installation is versatile, as it works over plywood, backer board, or concrete slabs, which covers most common floor bases. However, the cable cannot be cut, so careful layout planning around obstacles is necessary.

A key feature is the included SunStat CommandPlus Wi-Fi thermostat, which offers a touchscreen, voice control compatibility with Alexa and Google Assistant, and remote access through a smartphone app. This allows for convenient and energy-efficient temperature adjustment, helping save on heating costs. The thermostat also monitors energy use and electrical safety, providing additional peace of mind. At just 0.125 inches thick, the cable adds minimal height to your floor, which is beneficial when maintaining existing floor levels. The product is UL certified, indicating it meets standard safety requirements. With more than 30 years of experience, SunTouch provides decent customer support and a warranty that customers can rely on.

The system’s heating capacity is limited to 240 watts over 100 square feet, making it adequate for supplemental heating but potentially insufficient as the primary heat source in very cold areas. Installation may be challenging for those unfamiliar with electrical work, as it requires proper placement and connection to a 240V power source. This kit is a reliable choice for homeowners seeking comfortable, energy-efficient warmth for tile or similar floors, especially for those who value smart home integration and remote temperature management.

The LuxHeat 100 Sqft Mat Kit is a comprehensive electric radiant floor heating system designed for under tile, stone, and laminate surfaces. Its key features include a 100 square foot self-adhesive heating mat, a cable monitor/alarm, and a user-friendly OJ Microline programmable thermostat with floor sensor and built-in GFCI. The system is designed for ease of installation, with the mat being cuttable and rotatable to fit various floor plans, though care must be taken not to cut the red heater wire. The mat's low-profile heating wires (1/8" in diameter) minimize the impact on the finished floor height, which is a significant advantage for maintaining a seamless floor appearance. Additionally, the product boasts a 25-year limited warranty, reflecting the manufacturer's confidence in its durability and performance.

The thermostat offers advanced features like dual sensing, power logging, a child lock, self-learning capabilities, and a 7-day programmable schedule, which helps manage energy consumption efficiently. However, it is essential to note that the thermostat has a 3-year warranty, which is shorter than the mat's warranty period. The system's energy efficiency is noteworthy, with a power output of 1200 watts and a voltage of 120 volts. The inclusion of Class A GFCI protection enhances safety, making it suitable for wet locations.

On the downside, the initial installation requires careful handling and potentially professional assistance to ensure the heating wires are properly embedded in underlayment or mortar. Despite its complexity, this product is ideal for users seeking a reliable, efficient, and comfortable underfloor heating solution for their indoor spaces.

The Suntouch Warmwire Radiant Floor Heating Kit is designed to provide efficient and customizable under-tile heating for a 100-square-foot area. The kit includes a 120V heat cable which integrates with the HeatMatrix membrane for seamless installation and virtually zero electromagnetic fields.

The included SunStat ConnectPlus thermostat allows for remote control via a mobile app, enabling users to adjust settings from anywhere and benefit from energy-saving features like weather compensation. This makes it highly convenient and user-friendly for modern homes. The HeatMatrix membrane simplifies installation with its easy-to-lay design and multiple wire-spacing options, while also offering waterproofing and vapor management to protect your subfloor.

Safety is a priority with the Loudmouth Monitor that alerts you if the heating wire is damaged during installation. The kit comes with all necessary installation tools, ensuring you have everything needed for setup. The kit’s high energy efficiency and programmable, smart thermostat make it a great choice for those seeking an upgrade to their under-tile heating system. Additionally, some users might find the initial installation process complex despite the tools provided.