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Line-voltage · Honeywell Home

Honeywell Home RLV3120A1005 Line-Voltage Thermostat

Line-voltage, 240 V, 2,000 W

At a glance

Suited to baseboard and wall heaters.

Strong points
Rated 2,000 W.
Weak points
Household-voltage wiring.
Best match
Baseboard and wall heaters.
Works with
Push Button
Connectivity
Wired
Schedule
Non-Programmable
Display
Digital
Power
Electric
Voltage
240 V
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Updated October 2026

Honeywell Home RLV3120A1005 Line-Voltage Thermostat

Image: Honeywell Home

Will it work with your system?

Works well with

  • Baseboard and wall heaters
  • 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 RLV3120A1005 Line-Voltage Thermostat is a line-voltage for electric heat that runs at line voltage (240 V per the maker).

Its maker rates it for 2,000 W. At 240 V that covers heaters totalling about 2,000 watts (watts = amps × volts). Check your heaters' load.

Connectivity: Wired, so the schedule and setpoint can be changed from a phone.

This isn't a 24-volt job. Turn the breaker off, check with a tester, and hire an electrician for anything you're unsure of. Why baseboard heat needs its own thermostat.

Also on the listing: dimensions of 1.1 in (D) x 3.2 in (W) x 4.8 in (H), a weight of 6.4 ounces and a digital.

Warranty, per the listing: 1 year limited 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 numberRLV3120A1005Retailer
Model nameDigitalRetailer
Dimensions (seller)1.1"D x 3.2"W x 4.8"HRetailer
Works withPush ButtonRetailer
Features (seller)TRIAC SwitchingRetailer
ConnectivityWiredRetailer
PowerElectricRetailer
Voltage240 VRetailer
DisplayDigitalRetailer
Mounting / installationBaseboardRetailer
Max load2000 WRetailer
Warranty1 year limited warranty.Retailer
Product weight6.4 ouncesRetailer
ScheduleNon-ProgrammableRetailer

Strong points and weak points

Strong points

  • Rated 2,000 W
  • Wi-Fi control
  • 240 V

Weak points

  • Household-voltage wiring
  • 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

Cadet 8734 Line-Voltage Thermostat240 V, single pole.
Cadet BTF1W Line-Voltage Thermostat240 V, single pole.
Honeywell Home YRLV4300A1014 Line-Voltage Thermostat120/240 V.

FAQ

How many heaters can the Honeywell Home RLV3120A1005 Line-Voltage Thermostat control?
As many as fit within its rating of 2,000 W: add the heaters' watts and divide by the voltage.
Can the Honeywell Home RLV3120A1005 Line-Voltage 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

Suited to baseboard and wall heaters.

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.
Check price on Amazon

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