How many room sensors do I need?

Start with one sensor in the room where you spend the most time that differs most from the thermostat location. Most homes benefit from 2-4 sensors covering bedrooms and the main living area. You do not need one in every room.

Do room sensors replace HVAC zoning?

No. Room sensors help the thermostat make smarter decisions about when to run, but they cannot direct airflow to specific rooms. True HVAC zoning with dampers provides room-by-room temperature control. Sensors are a much cheaper first step that helps most homes significantly.

Best Smart Thermostats with Room Sensors 2026