Slab Heating Systems
Permanent In-Slab Radiant Heat for New Concrete Construction
Slab Heat systems are embedded directly into new concrete pours, delivering powerful radiant warmth through the slab itself. With 15–20 watts per square foot output, Slab Heat mats and cables are the right solution for basements, garages, sunrooms, and any space built on a new concrete slab. Install once, enjoy for decades.
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Why Choose In-Slab Radiant Heating?
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In-Slab vs Surface Installation: Which Is Right for You?
Slab Heat Systems
Embedded during new concrete construction. Permanent solution for new builds, additions, and renovation projects where the slab is being poured.
- New concrete construction only
- Any finished floor on top
- 15–20W/sq ft high output
- Permanent — no future access needed
- Best for basements, garages, sunrooms
Surface Systems (TempZone™ / Environ™)
Installed on top of the existing subfloor, under your finished flooring. Suitable for renovation projects in existing homes.
- Existing homes & renovation projects
- Installs under tile, wood, laminate, carpet
- 12–15W/sq ft output
- Faster installation, no concrete involved
Slab Heat Mats
Slab Heat mats come with factory-pre-spaced heating elements for fast, consistent installation. Simply roll out the mat over your reinforcing wire or mesh, secure it, and pour. With 20 watts per square foot output, these mats deliver powerful heat through even thick concrete slabs.
Pre-Spaced Elements
Factory-spaced heating elements—just roll out, secure, and pour. Faster than spacing individual cables.
20W/sq ft Output
High 20W/sq ft output overcomes concrete's thermal mass for reliable, even warmth across large areas.
Curing Time
Allow 7 days minimum for concrete to cure before powering on the heating system.
Warmth for Concrete Floors — Mat Form
With concrete heating mats, you can design your concrete floors to be as warm and functional as they are attractive. Radiant heating in mat form allows for quick and easy installation under concrete slab floors.
- Cut‑and‑turn mats speed up slab installations
- Ideal for basements, garages, and sunrooms
- Even, reliable heat embedded in the concrete
- 10 Year Warranty
- Our systems are cUlus listed, Gfci protected and RoHs Compliant
Slab Heat Cables
Slab Heat cables give you maximum layout flexibility for irregular or complex slab areas. Route the cable around structural elements, posts, or drain locations with full control over coverage and spacing. Ideal for professionals and large, non-rectangular spaces.
Spacing Guidelines
- 3" spacing — Bare, polished, or stamped concrete (20W/sq ft)
- 5" spacing — When adding a floor covering on top (15W/sq ft)
15–20W/sq ft Output
Adjustable output from 15–20W/sq ft by changing cable spacing to suit your floor finish.
Maximum Flexibility
Route cable around any obstacle—columns, drains, footings—for full coverage of complex slab layouts.
Warmth for Concrete Floors
With concrete heating cables, you can design your concrete floors to be as warm and functional as they are attractive. Radiant heating cables offer maximum flexibility for installation under concrete slab floors.
- Embedded directly into new concrete pours
- Ideal for basements, garages, and sunrooms
- Long-lasting radiant heat built into the slab
- 10 Year Warranty
- 15-20 Watts Per Sq. Ft
In-Slab Installation Overview
Slab Heat installation requires coordination with your concrete pour schedule. Here's a summary of the key steps and considerations:
Insulate Below the Slab
Install rigid foam insulation (XPS/EPS) with a vapor barrier under the slab to prevent heat loss downward.
Place the Heating System
Lay mats or space cables over the reinforcing mesh at 2–3" from the finished surface. Secure firmly before the pour.
Pour and Cure Concrete
Pour the slab carefully over the heating system. Allow a minimum of 7 days for curing before activating heat.
Install Finish & Thermostat
Apply your finish floor (or leave as polished/stamped concrete) and connect your thermostat for automated control.
How Much Does It Cost to Run a Slab Heating System?
Slab heating operates most efficiently with a programmable thermostat and a well-insulated slab. Once the concrete reaches temperature, it retains heat for hours—reducing total run time and operating cost. Use the calculator below to estimate your costs.
Free SmartPlan
Get a custom installation plan for your slab heating project in just 1 business day.
"I'll create a custom installation layout showing exactly where your heating elements go, plus a complete materials list with pricing."
Tips for Lowering Slab Heating Costs
Insulate below the slab
XPS foam beneath the slab dramatically reduces downward heat loss
Use scheduling
Program the thermostat to pre-heat before peak use, then reduce overnight
Slab stores heat
Concrete's thermal mass means heat stays long after the system shuts off
Off-peak rates
Run during off-peak hours with time-of-use electric plans for lower costs
Compatible Thermostats for Slab Heating
Slab heating performs best with a programmable thermostat that can pre-heat the slab before peak use.
Our nSpire Touch and nJoy WiFi thermostats support up to 10 schedule segments per day for maximum efficiency.
Explore all thermostats
- Sleek, Modern Design: Features an LED display and capacitive touch interface for intuitive temperature adjustments
- User-Friendly Operation: No programming required—simply set your desired temperature for consistent warmth and comfort
- Versatile Compatibility: Compatible with both 120V and 240V electric floor heating systems and radiant panel heaters
- Safety Assured: cULus listed with a built-in GFCI for peace of mind
- Included Floor Sensor: Comes with a 10k ohm floor sensor to monitor and maintain optimal floor temperatures
- WiFi capabilities allow you to control your thermostat with your smart device
- Allows for remote troubleshooting and software updates
- Can be paired with a Google Assistant or Amazon Alexa enabled device for voice control
- Program up to 10 different schedules along with setting up schedule overrides like vacation mode
- With an included floor sensor, your system can cycle on and off and continuously adjust to save energy
- Program up to 6 setting changes for each day of the week
- It’s never been easier to set up a radiant heating system according to your preferences and schedule
- With an included floor sensor, your system can cycle on and off and continuously adjust to save energy
- With its crystal-clear 3.5” full color touchscreen display, the nSpire Touch is as easy to operate as it is to look at
- Dual voltage (120V/240V)
Where Slab Heating Works Best
Slab Heat systems are the right choice for any space with a new concrete slab. Explore room-specific guidance:
Find Floor Plans by Room
Select a room type to browse floor plans with instant quotes, operating costs, and installation plans for slab heating projects.
Slab Heating Projects
See real customer installations featuring Slab Heat systems in basements, garages, and sunrooms.