Can you add more wire to increase the square footage? Or does that controller only cover 30 square feet?

The maximum combined load per one thermostat is 15.0 Amps. This allows to control up to 150sqft (1,800 Watts) per thermostat using 120V heating system, or up to 300sqft (3,600 Watts) per thermostat using 240V heating system. 30sqft, 120V cable has 3 Amps load. You can add up to 12 Amps or 120sqft, 120V. Multiple cables must be wired to the thermostat in parallel.

There are two different pictures shown for the thermostat controller. Which one comes with the product?

From what I can see in the pics, the 3rd picture just shows the thermostat with the 2 side covers, which hide the settings buttons, open. We have this system at home and the thermostat is as it appears in the pictures. The sides do open and close to reveal the buttons. Hope that helps!

Can this product be installed on the underside of the subfloor? I know this would reduce the potential gain, but would also remove the need to retile.

Strongly not recommend to install heating wire underside of the subfloor, it won't give you any heat at all. Has to be installed under tile only.

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🔥 Warm up your life, one floor at a time! 🔥

SMART CONTROL - Enjoy the convenience of a programmable thermostat for ultimate comfort.
EASY INSTALLATION - Designed for a hassle-free setup, making it perfect for DIY enthusiasts.
EFFORTLESS COMFORT - Transform your space into a cozy haven with radiant heat.
SPACE SAVING DESIGN - Ultra-thin heating cable ensures your floors stay sleek and stylish.
RELIABLE PERFORMANCE - UL listed and backed by a 25-year warranty for peace of mind.

The HeatTech 30 sqft Floor Heating Cable Set is a cutting-edge electric radiant heating system designed to provide efficient warmth to your floors. With a 120ft long heating cable, it covers up to 30 sqft at optimal spacing and operates at 120V with a powerful 360W output. The included 7-day programmable thermostat allows for personalized heating schedules, ensuring comfort when you need it most. UL listed for safety and backed by a 25-year warranty, this system combines modern design with reliable performance.

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€ 379.32

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Brand	HeatTech
Special Feature	Programmable
Power Source	Corded Electric
Voltage	120 Volts
Shape	Rectangular
Style	Modern
Backlight	Yes
Specification Met	certified frustration-free
Manufacturer	HeatTech
Part Number	HTCBL-KIT-120-120
Item Weight	5.28 pounds
Package Dimensions	12.2 x 9.29 x 6.65 inches
Item model number	HTCBL-KIT-120-120
Is Discontinued By Manufacturer	No
Size	120 Feet
Item Package Quantity	1
Special Features	Programmable
Batteries Included?	No
Batteries Required?	No

30 sqft Floor Heating Cable Set, Electric Radiant in-Floor Heat Heating Cable Warming System, 120V, 120ft Long Heating Cable, 7-Day Programmable Floor Sensing Thermostat Aube TH115-AF-120S

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