If you are specifically looking for an underfloor heating wet system kit, none of the five products supplied here is a wet hydronic system: all use electric heating cables or mats. The 40-square-foot LuxHeat kit is best for buyers who want an electric system with an uncoupling membrane, while the 70-square-foot Warming Systems mat is best for covering a larger tiled area. The smaller Warming Systems cable kits suit compact bathrooms. Use the guide below to distinguish these electric options from a true water-based system before choosing.
| Product | Type | Best suited for |
|---|---|---|
| LuxHeat 40 Sq Ft System | Electric cable and membrane | Tile projects needing an uncoupling membrane |
| Warming Systems 70 Sq Ft Mat | Electric heating mat | Larger tiled areas |
| Warming Systems 40 Sq Ft Cable Kit | Electric heating cable | Medium-sized bathroom floors |
| Warming Systems 15 Sq Ft Cable Kit | Electric heating cable | Small bathroom floors |
| Heatwave Electric Floor Heating Kit | Electric heating mat | Buyers considering a programmable electric mat |
LuxHeat 40 Sq Ft Cable And Membrane Kit
This LuxHeat kit is an electric underfloor heating package, not a wet hydronic kit. It includes a 40-square-foot, 120-volt heating cable, a 50-square-foot Prova Flex-Heat uncoupling membrane, a programmable UDG4 thermostat, a floor sensor, an alarm, and a wood float for membrane installation.
Best for: Tile projects where the buyer wants heating cable and an uncoupling membrane in one package. The listed membrane is described as offering waterproofing, crack prevention, and load support; those functions do not turn the electric kit into a water-based heating system.
The thermostat features dual air-and-floor sensing, Class A GFCI protection, power logging, child lock, and a seven-day, four-event schedule. Choose this option if those components suit the planned electric installation.
Limitation: The heating wire must be covered with self-leveler or thinset and must not be cut or shortened. Buyers seeking tubing connected to a boiler or heat pump should choose a hydronic product instead.
Warming Systems 70 Sq Ft Heating Mat
This 120-volt electric mat is listed for 70 square feet and measures 20 inches wide by 42 feet long. The kit includes a UDG4-4999 touchscreen programmable thermostat with a floor sensor and an installation warning monitor. The mat can be flipped and turned to fit room layouts, and double-sided tape helps hold it to the subfloor.
Best for: Buyers comparing electric mats for a relatively large tiled area, such as a kitchen or bathroom. Its listed coverage is greater than the 15- and 40-square-foot cable kits in this selection.
The thermostat has a seven-day programmable interface, dual air-and-floor sensing, energy monitoring, and built-in Class A GFCI protection. It is described as compatible with 120-volt and 240-volt radiant floor heating systems, although this particular mat kit is specified as 120 volts.
Limitation: This is an electric mat, not a hydronic system. Confirm the actual heated-floor area and electrical requirements for the project; the mat’s stated coverage does not necessarily equal the full room area.
Warming Systems 40 Sq Ft Cable Kit
This electric kit includes 160 linear feet of cable for 40 square feet, rated at 120 volts, 480 watts, and 12 watts per square foot. It also comes with cable guides, a UWG5-4999 programmable touchscreen thermostat, a floor sensor, and an installation warning monitor.
Best for: Buyers who want electric cable coverage for a medium-sized tiled floor and prefer to arrange cable rather than lay a fixed-width mat. The product details describe the cable as 1/8 inch thick and suitable for installation under tile or porcelain.
The thermostat is listed with Wi-Fi and Bluetooth connectivity, voice-control compatibility, and built-in GFCI protection. The kit is described as approved for wet areas and as UL listed for the United States and Canada.
Limitation: The 40-square-foot figure is the specified heating coverage, not a promise that the cable fits every 40-square-foot room. Room layout and areas that should not be heated affect the amount of usable floor space.
Warming Systems 15 Sq Ft Cable Kit
This compact electric kit contains 60 linear feet of cable for 15 square feet of coverage. Its listed electrical specifications are 120 volts, 180 watts, and 12 watts per square foot. The package includes installation cable guides, a programmable UWG5-4999 thermostat, a floor sensor, and an installation warning monitor.
Best for: Small bathrooms or limited tiled areas where a 40- or 70-square-foot system would provide more cable coverage than the project needs. The cable is listed as 1/8 inch thick and intended for installation under tile or porcelain.
The thermostat has Wi-Fi and Bluetooth connectivity, voice-control compatibility, and built-in GFCI protection. The product details also state that the kit is approved for wet areas and UL listed for the United States and Canada.
Limitation: Its 15-square-foot coverage can be restrictive. Measure the floor area that can actually receive heating cable, rather than sizing the kit from the room’s total square footage.
Heatwave Electric Floor Heating Kit
The Heatwave product is an electric floor-heating mat with a programmable thermostat and a 15-foot cold lead. Its supplied product information contains a coverage mismatch: the name says 50 square feet, while the feature description says the mat covers up to 15 square feet. Confirm the intended coverage with the seller before selecting it for a project.
Best for: Buyers comparing electric mats who value a reversible mat design and a programmable control schedule, provided the coverage is confirmed before purchase. The listing describes the mat for use under tile, laminate, and carpet and says it has adhesive backing.
The thermostat is described as having a seven-day, four-event schedule and support for 120- or 240-volt systems, with control up to 15 amps. These are electric-system features, not hydronic controls.
Limitation: The conflicting area information makes this option harder to size confidently. It is not a wet hydronic kit, and the supplied details do not resolve the stated 15-versus-50-square-foot discrepancy.
Buying Guide: How To Choose An Underfloor Heating Kit
Do you need a wet hydronic system or an electric system?
A wet underfloor heating system, also called hydronic heating, circulates heated water through tubing installed beneath the floor. The water is typically heated by a boiler or another suitable heat source. An electric system uses resistance-heating cable or a mat connected to electrical controls. The five products above are all electric; none includes water tubing or a hydronic heat source.
Choose a true wet-system kit if your project specifically requires water-based heating. Check whether the package includes tubing, manifolds, controls, and the components needed to connect to the heat source, because “kit” can refer to different bundles. Consult a qualified heating professional about system design and installation requirements.
How much floor area should the kit cover?
Use the manufacturer’s stated heated area as a starting point, then measure the floor space available for heating. The full room area may not be usable for cable or mat placement. Fixtures, cabinets, and layout constraints can reduce the installable area. The Heatwave listing has conflicting coverage information, so verify that figure before buying.
For the products listed here, the nominal coverage ranges from 15 square feet to 70 square feet. A smaller cable kit may suit a compact bathroom, while the 70-square-foot mat is the largest stated coverage option. Do not assume that separate kits can be combined unless the manufacturer confirms it.
Should you choose a cable or a mat?
A cable kit gives the installer flexibility to arrange cable around a room’s shape, using the installation method and spacing specified for that product. A mat provides a prearranged heating layout and may be easier to position over a straightforward open area. The 70-square-foot mat in this selection is described as reversible and adjustable by flipping or turning it.
Compare the heating element’s layout with the usable floor plan. A mat’s stated area and width may affect placement, while cable requires careful routing. Follow the product instructions; do not cut heating cable unless the manufacturer explicitly permits it.
What controls and safety features matter?
Check whether a kit includes a floor sensor and thermostat, and review the thermostat’s voltage and electrical ratings. Some products in this selection list programmable schedules, dual air-and-floor sensing, GFCI protection, or an installation warning monitor. These features differ by product, so compare the specific package rather than assuming every electric kit has the same controls.
Confirm that the system’s electrical requirements suit the installation and that applicable local rules are followed. A listed GFCI feature does not remove the need to follow installation directions and electrical safety requirements.
What flooring and installation details should you check?
Review the manufacturer’s approved flooring types, required covering materials, and installation instructions before selecting a kit. The LuxHeat listing says its cable must be covered with self-leveler or thinset and includes an uncoupling membrane. The Warming Systems cable kits describe installation under tile or porcelain. Heatwave lists tile, laminate, and carpet, but the exact floor assembly requirements should be verified in its instructions.
For wet areas, confirm that the complete floor assembly—not just the heating element—is appropriate for the location. Check waterproofing details separately, particularly around showers and other areas exposed to water.
Frequently Asked Questions
Are any of these products wet underfloor heating kits?
No. All five are electric heating cable or mat kits. A wet hydronic kit uses water-carrying tubing and must be connected to a suitable heat source and controls.
Can electric floor heating be installed in a bathroom?
Some listed kits are described as suitable for bathroom floors or approved for wet areas. Confirm the product’s installation instructions and the requirements for the full floor assembly before using any heating system in a bathroom.
Which listed kit covers the largest area?
The Warming Systems electric mat is listed for 70 square feet. Its stated coverage is larger than the 40-square-foot and 15-square-foot cable kits. Confirm that the heated area fits the room layout.
Is the Heatwave kit definitely 50 square feet?
The supplied details conflict: the product name says 50 square feet, while the feature description says up to 15 square feet. Verify the coverage with the seller before purchase.
What should I buy for water-based floor heating?
Look for a hydronic underfloor heating kit that explicitly includes water tubing and the components required for the planned system. None of the five products reviewed here is a water-based kit.