C-wire adapter · ecobee

ecobee EB-PEK2-01 C-Wire Adapter

C-wire adapter

At a glance

A fit for walls without a C wire.

Strong points
No new cable to run.
Weak points
Check system support (often single-stage).
Best match
Walls without a C wire.
Works with
Touch
Connectivity
Wi-Fi
Voltage
24 vac
Material
Plastic
Dimensions (seller)
2.44 x 2.44 x 0.9 inches
Product weight
2.56 ounces
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Updated October 2026

Will it work with your system?

Works well with

  • Walls without a C wire

Check first if you have

  • Heat pumps or multi-stage systems it doesn't list

What it controls

The ecobee EB-PEK2-01 C-Wire Adapter is a C-wire adapter.

A C-wire adapter gives a thermostat steady 24-volt power over the existing wires, usually with a module at the furnace control board. Check that its listing names your thermostat and system; many support conventional single-stage systems only. The C wire guide.

From the listing: works with: Touch.

Also on the listing: dimensions of 2.44 x 2.44 x 0.9 inches and a weight of 2.56 ounces.

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 numberEB-PEK2-01Retailer
MaterialPlasticRetailer
Dimensions (seller)2.44 x 2.44 x 0.9 inchesRetailer
Mounting / installationSurface MountRetailer
Works withTouchRetailer
ConnectivityWi-FiRetailer
Product weight2.56 ouncesRetailer
Voltage24 vacRetailer

Strong points and weak points

Strong points

  • No new cable to run

Weak points

  • Check system support (often single-stage)

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

Will the ecobee EB-PEK2-01 C-Wire Adapter work with my system?
Check the adapter's listing for your thermostat and system type; many support conventional single-stage systems only.

Other sensors, c-wire adapters and wiring with similar wiring

All sensors, c-wire adapters and wiring in one grid · Every ecobee control listed

Our take

A fit for walls without a C wire.

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