Solves the missing common wire problem for almost any thermostat including Smart, Wi-Fi, Z-Wave, ZigBee, or other type of thermostat. Formerly called the AS30 Auxiliary Switch, EZwire™ easily installs at the furnace and uses the existing wires to add the common wire function without pulling another wire.

EZwire features and benefits

will let you install most any new thermostat providing full functionality even if you only have TWO WIRES!
is used to add-a-wire or substitute for a broken wire when the appropriate number of wires are not available when the old thermostat is removed
works with single or dual transformer systems
eliminates the hassle of pulling new wire when installing a new thermostat.

Take advantage of Internet enabled technology in your home even if you have an old heating and cooling system.
Was your air conditioning added to an existing system? If it was and they used a separate transformer for it, EZwire can handle it allowing you to upgrade your thermostat without having to replace ANY of your HVAC equipment.

Do you need EZwire?Check your old thermostat to see if you have a wire connected to “C” or “X”, or a spare wire that is not connected to anything. If you don’t have one of these, then you will need EZWire.
Check your old thermostat to see if you have separate wires connected to BOTH “Rh” and “Rc” and are not connected together. If you do, then you need EZWire.
NOTE: You will only need one EZWire to add a wire for one thermostat as one EZwire can handle both a missing common wire and two separate transformers.

Compatibility
EZwire works with Nest, Honeywell, Aprilaire, Filtrete, Computime, Trane, Robert Shaw, White-Rodgers, and most any other thermostats.

Product Features

• Provides a common wire for 5, 4, 3, or even 2-wire installations
• Supports single and dual transformer installations and both heat pump or conventional systems
• Allows a control signal (W, Y or G) to be multiplexed over a common wire
• Easy installation at/near your HVAC equipment
• Solves almost any thermostat wiring problem with 24 VAC systems controls