When it comes to installing a cable specifically engineered to handle the evolving demands and functionality of thermostats, plenum-rated thermostat wire delivers exactly what you need:

• First cable designed specifically for the power requirements of the circuit
• Ideal for both new (energy-efficient) and existing HVAC equipment
• 4 conductor constructions
TWP-18/4 is 18 guage solid, four conductor, plenum rated in 250' rolls.