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 150 Sqft Mat Kit is an electric radiant floor heating system designed for use under tile, stone, and laminate floors. It uses 120-volt self-adhesive heating mats, providing efficient and even heat distribution across a 150 square foot area. The heating mats are easy to install due to their pre-spaced design and self-adhesive properties, although the heating wires must be embedded in a self-levelling underlayment, thinset, or mortar, which might require professional help for proper installation.

The kit includes a high-quality OJ Microline programmable thermostat with a built-in GFCI (ground fault protection) and a floor sensor, enhancing both safety and ease of use. The thermostat's 7-day program schedule and dual sensing capabilities (air/floor) allow for customized comfort and energy efficiency, though some users might find the programming process slightly complex at first. The system operates at a maximum power of 1800 watts and 15 amps, making it highly efficient.

Another significant benefit is the 25-year limited warranty on the heating mats, providing long-term performance assurance. Additionally, the product's low electromagnetic field (EMF) emissions and safety certifications (UL certified and safe for wet locations) further enhance its reliability. However, the initial cost and the potential need for professional installation could be considered drawbacks. This under-tile heating system is suitable for homeowners looking for a reliable and efficient way to add warmth to their floors, especially in bathrooms, kitchens, or other areas with tile or stone flooring.

The SunTouch HeatMatrix Anti-Fracture Membrane Mat is designed to simplify installing electric radiant floor heating, particularly with WarmWire heating cables. It serves as both a protective uncoupling membrane and a waterproof barrier, which helps prevent cracked tiles by reducing stress from floor movement. Made from durable polypropylene and measuring 0.24 inches in thickness, it offers vapor management and works well over concrete or structurally sound subfloors under tile, stone, or laminate. The mat covers a sizable 161 square feet, supporting flexible wire spacing options to tailor heat output and coverage to your needs, with 3-inch spacing recommended for efficient warmth.

This product itself is not the heat source but a base mat for heating wires, integrating well into electric heating systems from SunTouch, a trusted brand with over 30 years in radiant heat. Installation is relatively straightforward, pressing the WarmWire into pre-cut channels and embedding it in mortar. Energy efficiency depends on the heating wire used but the mat helps protect system longevity by managing moisture and cracking. The mat adds just 0.24 inches to installation height, minimal for most projects. Controls and heat output come from the heating cables and thermostat you select separately.

A major plus is the 25-year warranty on the heating mats, reflecting confidence in durability, though controls have a shorter 2-year warranty. This product is best suited for homeowners or installers looking for a reliable foundation to build an electric radiant heat system beneath tile floors, especially where crack isolation and waterproofing are priorities. It’s less suitable if you need a complete heating system in one package, as the heating cables and controls are sold separately.