Best 240V Radiant Heaters and Underfloor Heating Kits

Overview: This guide compares top-rated 240V radiant heaters and underfloor heating kits designed for American homes. Selected products include full kits with thermostats and GFCI protection, hardwired infrared patio heaters, and stand-alone line-voltage thermostats for radiant systems.

Product	Type	Key Feature
LuxHeat 200sqft Electric Radiant Floor Heating System	Full 240V Floor Kit	Includes programmable thermostat w/ GFCI, membrane, sensor
LuxHeat 40sqft Electric Radiant Floor Heating System	Compact 240V Floor Kit	Wi‑Fi thermostat with GFCI, uncoupling membrane
Warming Systems 20 Sqft 240V Electric Radiant Floor Heating Kit	Small 240V Floor Cable Kit	WiFi LED thermostat, installation monitor
QuietWarmth THERMPRO 7‑Day Programmable Thermostat	Line‑Voltage Thermostat	Built‑in GFCI for 120/240V radiant systems
Bromic Heating Smart Heat Tungsten 6000W Radiant Infrared Heater	Patio Infrared Radiant Heater	High‑output 6000W radiant heater, wall/ceiling mount

LuxHeat 200sqft Electric Radiant Floor Heating System – 240V

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This complete 240V kit is targeted at large rooms up to 200 square feet. The package includes a 240V heating cable, a Prova Flex-Heat uncoupling membrane, a touchscreen programmable thermostat (UDG4-4999) with integrated Class A GFCI, floor sensor, and an alarm. The membrane provides waterproofing, crack prevention, and load support, simplifying tile installations. The thermostat offers dual sensing (air and floor), power logging, child lock, and a 7-day program schedule for zone control.

Installation notes in the feature list stress that heating wires must be covered with a self-leveler or thinset and must not be cut. The thermostat is cULus approved for US/Canada and includes a 3-year factory warranty. This kit suits full-room tiled floors where a professional or competent DIY installer can embed wiring in mortar or self-leveling compound.

LuxHeat 40sqft Electric Radiant Floor Heating System – 240V

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The 40 sqft LuxHeat kit scales down the larger system for bathrooms, small kitchens, or targeted areas. It includes a 240V heating cable, uncoupling membrane, Wi‑Fi programmable touchscreen thermostat (UWG4-4999) with integrated GFCI, alarm, and floor sensor. Wi‑Fi control enables remote monitoring and scheduling via smartphone.

Key features include the same membrane-based installation benefits—waterproofing and crack control—plus child lock, power logging, and a 7-day/4-event program. The thermostat’s Class A GFCI is highlighted as a necessary safety element for electric floor heating. The kit is positioned for tiled surfaces and requires the heating wires be embedded in thinset or self-leveler without cutting.

Warming Systems 20 Sqft 240V Electric Radiant Floor Heating Kit

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This compact 20 square foot kit uses a single 80′ cable (240V) intended for small baths or targeted warming applications. The kit includes a WiFi LED touch programmable thermostat rated for 120/240V and 16 amps, a floor sensor, cable guides, and an installation monitor that alarms if the wire is damaged during installation. The cable is UL listed for use in wet areas and is designed to be embedded in modified mortar.

The installation is the common “wire-on-a-spool” approach—spacing the cable roughly 3” apart and securing with guides before embedding. The kit’s monitor aids installation safety, and the WiFi thermostat offers remote control. This product suits homeowners needing a small, focused heated floor area with basic online control and an installation alarm for protection during embedding.

QuietWarmth THERMPRO 7-Day Programmable Thermostat w/ Built-in GFCI

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The QuietWarmth THERMPRO is a line-voltage thermostat designed specifically for radiant floor systems, compatible with 120V or 240V installations. It features a built-in ground fault circuit interrupter (GFCI), dual sensing capability (air and floor), and a 7-day programmable schedule for zoning and energy management.

This unit is often paired with existing heating cables or mats where a thermostat upgrade is needed. The built-in GFCI adds a layer of electrical protection without requiring a separate GFCI breaker. The feature list positions the THERMPRO as a focused control option for both new installs and retrofit projects where safe line-voltage thermostat control is required.

Bromic Heating Smart Heat Tungsten Electric 6000W Radiant Infrared Heater

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This high-output radiant infrared heater is intended for outdoor or semi-enclosed spaces and is often installed on walls or ceilings. The tungsten element emits a warm glow and delivers concentrated radiant heat without relying on warmed air. The unit is designed for flexible placement and construction that resists corrosion and high temperatures.

At 6000W, this product typically connects to high-voltage hardwired circuits—and in many applications will require a 240V supply and appropriate circuit protection. The Bromic unit is positioned for patios, covered decks, and commercial outdoor spaces where targeted radiant warmth and aesthetic lighting are both priorities.

Buying Guide: How To Choose A 240V Radiant Heater Or Underfloor System

Selecting a 240V radiant heating solution depends on the application: underfloor heating for indoor comfort, or infrared radiant units for outdoor/area heating. Below are the critical considerations to ensure safety, performance, and long-term value.

1. Application And Coverage

• Underfloor Heating Kits: Choose kit size based on square footage and floor type—tiles and stone work best with uncoupling membranes and thinset embedding.
• Patio/Infrared Heaters: Evaluate mounting location (wall/ceiling), orientation, and the effective radiant coverage area. Infrared delivers direct warmth so placement matters.

2. Voltage, Amperage, And Power Ratings

• Confirm the system is rated for 240V and check maximum amperage/wattage. Line-voltage thermostats often specify a maximum amp/load (e.g., 15–16A).
• Ensure your home circuit and breaker capacity align with the heater’s continuous load requirements; high-wattage units often require dedicated circuits.

3. Thermostat Compatibility And Controls

• Select thermostats designed for line-voltage operation for direct 240V control. Look for dual sensing (air and floor) for underfloor systems to avoid overheating floor surfaces.
• Consider programmable schedules, Wi‑Fi/mobile control, and integration with smart home systems if remote control or energy tracking is desired.

4. Safety Features: GFCI & Installation Monitoring

• Built-In GFCI: Thermostats with integrated Class A GFCI protect occupants by detecting ground faults—recommended for wet areas like bathrooms.
• Installation Monitors/Alarms: Kits with wire damage monitors can alert during installation if the cable is compromised, reducing the chance of post-install failures.

5. Installation Requirements And Flooring Type

• Check whether the kit requires embedding in thinset/self-leveler or can be used under floating floors. Membranes often demand specific installation steps.
• Uncoupling membranes provide crack prevention and waterproofing for tile installations. Heating wires must not be cut or shortened—adhere to manufacturer instructions.

6. Warranty, Certifications, And Listings

• Prefer products with UL/cUL or cETL listings for North American installations. These certifications verify compliance with safety standards.
• Review warranty length on both the heating element and thermostat. Kits often include a thermostat warranty distinct from cable warranties.

7. Professional vs. DIY Installation

• Small kits and simple wire installations may be manageable by experienced DIYers. For large areas or hardwired high-wattage heaters, consult a licensed electrician and certified installer.
• Permits and local electrical codes often apply for 240V hardwired devices—verify requirements before purchase.

8. Energy Use And Control Strategy

• Radiant systems can be operated on schedules to reduce energy use; programmable thermostats and smart controls can lower runtime and cost.
• Underfloor heating provides zoned comfort; size and insulation quality of the room affect runtime and efficiency.

9. Durability And Environmental Conditions

• For outdoor radiant heaters, select corrosion-resistant materials and models rated for semi-enclosed environments. Pay attention to IP ratings where provided.
• For floor systems, ensure the cable and membrane are suitable for the intended flooring (tile, vinyl, laminate) and for potential wet areas.

10. Troubleshooting And Maintenance

• Verify GFCI function after installation and periodically test built-in protective devices.
• Installation monitors and alarms can help identify damage during embedment. For long-term issues, contact the manufacturer or a licensed electrician to inspect wiring and controls.