Floor heating · Honeywell Home

Honeywell Home TH115-AF-GA/U Floor Heating Thermostat

Floor heating, 120 V

At a glance

A fit for electric floor heat.

Strong points
Wi-Fi control.
Weak points
Household-voltage wiring.
Best match
Electric floor heat.
Works with
Digital Programmable
Connectivity
Wi-Fi
Schedule
7-day programmable
Display
Digital
Power
AC
Voltage
120 V
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Updated October 2026

Will it work with your system?

Works well with

  • Electric floor heat
  • Room-by-room electric heat

Check first if you have

  • Furnaces, boilers and heat pumps (24 V)
  • Loads above its rating

What it controls

The Honeywell Home TH115-AF-GA/U Floor Heating Thermostat is a floor heating for electric heat that runs at line voltage (120 V per the maker).

The listing doesn't state a maximum load. Don't install it until you've confirmed the rating covers your heaters' total watts. How to work out the load.

As a floor-heating thermostat it typically works with a floor sensor; the floor system's maker specifies which thermostats it supports, and that comes first.

Connectivity: Wi-Fi, so the schedule and setpoint can be changed from a phone.

Line voltage can kill: switch the breaker off and confirm it's dead before touching the wires, and use a licensed electrician if you're unsure. Line vs low voltage.

Also on the listing: dimensions of 0.9 in (D) x 2.8 in (W) x 0.9 in (H), a weight of 0.05 kg and a digital.

Warranty, per the listing: No warranty.

Compatibility and specs

These come from the maker's listing for this exact model; the source of each is marked. Anything the maker leaves out is marked not stated.

Model numberTH115-AF-GA/URetailer
Model nameTH115-AF-GA/URetailer
Dimensions (seller)0.9"D x 2.8"W x 0.9"HRetailer
Works withDigital ProgrammableRetailer
Features (seller)Easy to InstallRetailer
ConnectivityWi-FiRetailer
PowerACRetailer
Voltage120 VRetailer
DisplayDigitalRetailer
Mounting / installationWall MountRetailer
Max load3600Retailer
MaterialHard PlasticsRetailer
WarrantyNo warranty.Retailer
Product weight0.05 kgRetailer
Schedule7-day programmableRetailer

Strong points and weak points

Strong points

  • Wi-Fi control
  • 120 V

Weak points

  • Household-voltage wiring
  • Max load not stated
  • One thermostat per heater circuit

Wiring and install notes

  • Compatibility statements are the maker's own. Confirm with the maker's compatibility checker, turn the power off before wiring, and leave line-voltage and furnace work to a licensed electrician or HVAC technician.

Thermostats to compare it with

FAQ

How many heaters can the Honeywell Home TH115-AF-GA/U Floor Heating Thermostat control?
The listing doesn't state a maximum load; check the rating plate before wiring.
Can the Honeywell Home TH115-AF-GA/U Floor Heating Thermostat run a furnace or heat pump?
No. It's a line-voltage thermostat for electric resistance heat; central systems use 24-volt thermostats.

Other line-voltage thermostats with similar wiring

All line-voltage thermostats in one grid · Every Honeywell Home control listed

Our take

A fit for electric floor heat.

Where to get it

The link goes to this exact model's listing. Check that the box includes the trim plate or C-wire adapter you need, and confirm your wiring with the maker's compatibility checker before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure