Question 1

Which is better, Honeywell CG511A Thermostat Guard or Nest Thermostat Lock Box?

Accepted Answer

Based on our testing, the Honeywell CG511A Thermostat Guard scores higher overall at 8.9/10. The Honeywell CG511A Thermostat Guard scored 8.9/10 and the Nest Thermostat Lock Box scored 8.8/10 in our Best Thermostat Covers and Guards 2026 evaluation.

Question 2

Is the Honeywell CG511A Thermostat Guard worth it over the Nest Thermostat Lock Box?

Accepted Answer

The Honeywell CG511A Thermostat Guard scores 8.9/10 while the Nest Thermostat Lock Box scores 8.8/10. The Honeywell CG511A Thermostat Guard is our "Best Overall" pick in the Best Thermostat Covers and Guards 2026 category.

Honeywell CG511A Thermostat Guard vs Nest Thermostat Lock Box: Which to Buy?