Question 1

Which is better, Southwire 18/5 Thermostat Wire 50ft or Cerrowire 18/5 Thermostat Wire 50ft?

Accepted Answer

Based on our testing, the Southwire 18/5 Thermostat Wire 50ft scores higher overall at 8.8/10. The Southwire 18/5 Thermostat Wire 50ft scored 8.8/10 and the Cerrowire 18/5 Thermostat Wire 50ft scored 8.4/10 in our Best Thermostat Wire Kits 2026 evaluation.

Question 2

Is the Southwire 18/5 Thermostat Wire 50ft worth it over the Cerrowire 18/5 Thermostat Wire 50ft?

Accepted Answer

The Southwire 18/5 Thermostat Wire 50ft scores 8.8/10 while the Cerrowire 18/5 Thermostat Wire 50ft scores 8.4/10. The Southwire 18/5 Thermostat Wire 50ft is our "Best Overall" pick in the Best Thermostat Wire Kits 2026 category.

Southwire 18/5 Thermostat Wire 50ft vs Cerrowire 18/5 Thermostat Wire 50ft: Which to Buy?