TempZone Cable Kit 75 ft (25 sqft @ 4 in spacing) with nTrust 2.0 Touch Nonprogrammable Thermostat, 240V, 3.7/ft, 1.24A
Part Number: TCT240-KIT-UTN5-075
This support page provides publications, manuals, specifications, videos, support articles, and common support questions
This support page provides publications, manuals, specifications, videos, support articles, and common support questions
Support Questions
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The breaker and wire sizes are selected based on the total amperage of the WarmlyYours heating system connected to a single thermostat. This information is on the WarmlyYours heating system's installation plan, electrical plan, or UL label. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12 gauge wire with a 20-Amp breaker, and loads up to 12 Amps - 14 gauge wire with a 15-Amp breaker. Local code and/or other factors may change these guidelines.
Waterproofing for the room is in the layer above the floor heating system. The layers for waterproofing this type of floor are:
- subfloor
- thinset
- uncoupling membrane
- tempzone heating cable
- waterproofing tape for seams and corners
- thinset or self leveling cement
- tile floor
WarmlyYours has recently begun including floor sensors with our heating elements to help ensure customers will have everything they need for optimal operation of their radiant heating systems.
The sensor included with your floor heating element can be installed with the heating system (the sensor is equally spaced between runs of the heating wire--see your install manual for more info). Installing this sensor with your floor heating control will enable energy efficient operation of the floor warming system based on the floor temperature instead of the ambient room temperature.
We generally recommend that you install a second, unconnected backup floor sensor alongside the primary one. In the very unlikely event that your first floor sensor is damaged, this install method will save you from having to pry up flooring to replace a floor sensor. You simply disconnect the damaged sensor from the thermostat and connect the backup sensor.
In addition to the floor sensor that was included with your heating element, our nSpiration Series thermostats also come with a floor sensor. If you purchase both a heating element and an nSpiration Series thermostat from WarmlyYours, you'll have a primary and a backup floor sensor for your system.
Make sure any cracks or raised edges are sanded down before installation. Seal and patch cracks where possible. If needed, pour a layer of self-leveling cement to make sure surface is level and flat. Then proceed with instructions to install desired floor heating system and flooring.
It is strongly recommended that an insulating underlayment be installed between the slab and heating element to prevent heat loss.
Reflective insulation is not effective with conductive heating, which is how embedded floor heating and snow-melting systems transfer heat. To be effective, the reflective insulation surface needs to face an air space (air gap), which allows the reflected heat to be redirected.
An effective solution considers the insulating material's R-Value. This is the rating of a material's insulating properties. The "R" stands for "resistance" and refers to the material's resistance to heat flow, or temperature conduction.
Yes, we offer several options to help make your floor heating system water resistant or waterproof. Our TempZone product line is designed for wet areas - making it completely safe for rooms that will have water on the floor at times or may experience leaks or flooding. We also offer waterproofing bands for our TempZone Cable + Prodeso Uncoupling Membrane system. Allowing you to waterproof all seams and the perimeters of the wall - guaranteeing that your floor heating system stays safe and prevents water from leaking to areas below.
Yes, radiant floor heating can be a primary heat source if its heat output exceeds the room's heat loss. For best results, we recommend using a 15-watt system, covering at least 80% of the floor, and ensuring the space is well-insulated. Use our Heat Loss Calculator to verify your specific needs.
Yes, radiant floor heating is an excellent primary heat source for tiny houses in mild to moderate climates. Because tiny houses have small footprints, the 15-watt output of TempZone™ can easily maintain comfort while saving valuable wall space. Ensure the structure is well-insulated and use our Heat Loss Calculator to confirm.
Yes, we strongly recommend installing insulation like ThermalSheet™ over concrete slabs. Concrete acts as a "heat sink," absorbing warmth that should go to your floor. Insulation directs the heat upward, significantly improving efficiency, reducing warm-up times, and allowing the system to function effectively as a primary heat source.
Underlayment is recommended for floating floors (laminate, LVP, wood) and installations over cold subfloors like concrete. It provides thermal insulation to prevent heat loss and improves system efficiency. For tile and stone, the system is typically embedded in thinset, so a separate underlayment is often unnecessary.
Single Conductor vs. Twin Conductor Identification
- A single conductor floor heating system is a loop of one core wire, it starts at the thermostat and ends at the thermostat - this is the original method of manufacturing heating cable. Most single conductor floor heating systems have the same color cold lead wire connected to both load terminals/pigtails of the thermostat. Some early single conductor floor heating systems were produced with a white and a yellow cold lead wire.
- A twin conductor floor heating system terminates two core wires at the end, both wires start at the thermostat - this is the current method of manufacturing heating cable. Most twin conductor floor heating systems will have two different colored cold lead wires, and one of these is black. The other wire in a WarmlyYours floor heating system is either yellow (120V system) or red (240V system). A few early Environ systems had two black cold lead wires.
Note:
- Not all heating cables are wired directly to the thermostat. It may have been necessary during installation to terminate the heating cable in a junction box, and then run a separate (contractor-supplied) wire from the junction box to the thermostat.
- WarmlyYours single conductor cold leads were produced with a 13‘ length at the start of the loop, and a 26‘ length at the end. The 120V floor heating systems had a yellow and a white label attached to the cold leads, and the 240V floor heating systems had a red and a white label attached.
- If you have a single conductor floor heating system and notice that one cold lead is thicker or feels hotter than the other, please contact technical support at +1 (800) 875-5285
WarmlyYours TempZone™ Flex Rolls and Easy Mats deliver 15 watts per square foot, the maximum allowed by the National Electrical Code. This provides 25% more heating power than the 12-watt industry standard. TempZone™ Cable can be spaced to deliver between 8 and 15 watts per square foot depending on your needs.
Yes, electric radiant floor heating is ideal for basements because it warms the cold concrete slab and provides consistent heat from the ground up. In well-insulated finished basements, it can serve as the primary heat source, turning a typically chilly space into a comfortable, year-round living area.
Radiant floor heating can heat a sunroom if the space has high-quality insulation and double-pane glass. Since sunrooms have high heat loss, a 15-watt system is essential. In extremely cold climates or poorly insulated sunrooms, it is best used as a supplemental source to keep the floor comfortable.
Most systems provide only 12 watts per square foot, which often lacks the power for primary heating in cold climates. WarmlyYours TempZone™ delivers 15 watts—a 25% increase. This higher output allows the system to overcome heat loss more effectively, providing reliable primary warmth even when outdoor temperatures drop.
Documents
Project Planners
Installation
- Setting Up the nTrust 2.0 UTN5-4999 (English)
- nTrust 2.0 UTN5 Touch Nonprogrammable Thermostat Startup Guide (English, French)
- nTrust 2.0 UTN5 Touch Nonprogrammable Thermostat Startup Guide (English, Spanish)
Technical Support
Wiring Diagrams
Sell Sheets
Operation Manuals
Specifications
Electrical (TCT240-3.7W-075)
| Amps | 1.24 A |
| Cold Lead Wire Gauge | 17 AWG |
| Floor Load | 0.3 kW |
| Ohms | 193.0556 Ω |
| Ohms Per Ft | 2.574 Ohm/ft |
| Thermal Power | 0.3 kW |
| Voltage | 240 V |
| Watts | 298 W |
| Watts Per Sq. Ft at 3.75 Inch Spacing | Up to 12 |
| Watts Per Sq. Ft. | 9 to 15 |
| Watts Per Sq. Ft. at 3 Inch Spacing | Up to 15 |
| Watts Per Sq. Ft. at 4 Inch Spacing | Up to 11 |
| Watts Per Sq. Ft. at 5 Inch Spacing | Up to 9 |
Warranty / Certifications (TCT240-3.7W-075)
| Approvals | cULus listed |
| Warranty | 25 Year Warranty |
| Wet Location Listed | US, Canada |
Warranty / Certifications (UTN5-4999)
| Approvals | cULus listed |
| Ingress Protection (IPxx) Rating | IP20 |
| Warranty | Limited 3-year warranty and lifetime technical support |
Performance (TCT240-3.7W-075)
| BTU Per Hour | 1017 Btu |
Electrical (UTN5-4999)
| Battery | 5 year battery backup of clock and calendar |
| Connection | 4 wires, double pole |
| Connection Method | Hardwired |
| Ground Fault Protection | GFCI, Class A, 5 mA |
| Maximum Current | 15 A |
| Maximum Power | 1800 W @ 120 V, 3120 W @ 208 V, 3600 W @ 240 V |
| Supply | 120 VAC, 208 VAC, 240 VAC (50/60Hz) |
Product Dimensions (TCT240-3.7W-075)
| Cold Lead Length | 15′ |
| Coverage | 25 ft² |
| Coverage at 3 Inch Spacing | 18.8 ft² |
| Coverage at 3.5 Inch Spacing | 21.9 ft² |
| Coverage at 3.75 Inch Spacing | 23.4 ft² |
| Coverage at 4 Inch Spacing | 25 ft² |
| Coverage at 5 Inch Spacing | 31.3 ft² |
| Heating Element Thickness | 3/16″ |
| Length | 75′ |
| Weight | 2.7 lbs |
Appearance (TCT240-3.7W-075)
| Color | Red |
Appearance (UTN5-4999)
| Color | White Acrylic |
| Display | LED Light Through |
Product Dimensions (UTN5-4999)
| Depth | 1.73″ |
| Installed Depth | 0.46″ |
| Length | 4.98″ |
| Weight | 0.6 lbs |
| Width | 3.09″ |
Installation (TCT240-3.7W-075)
Thermostat (UTN5-4999)
| Floor Sensor Compatibility | 10k ohms or 12k ohms |
| Includes Floor Sensor | 10k ohms, 15′ lead |
| Maximum Ambient Temperature Setting | 77 °F |
| Maximum Floor Temperature Setting | 104 °F |
| Minimum Ambient Temperature Setting | 32 °F |
| Minimum Floor Temperature Setting | 41 °F |
Logistics (TCT240-3.7W-075)
| Package Contents | (1) TempZone Floor Heating Cable 240V 3.7W/ft 75 ft 1.2A (TCT240-3.7W-075); 1x Floor Heating Sensor (FH-BACKUP-SENSOR) |
| UNSPSC Code | 40101830 |
Identifiers (TCT240-3.7W-075)
| SKU | TCT240-3.7W-075 |
| UPC (GTIN-12) | 881308049119 |
Identifiers (UTN5-4999)
| SKU | UTN5-4999 |
| UPC (GTIN-12) | 881308080426 |
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