Why this made the list
Every other thermostat on this list sells its room sensor separately, if it offers one at all. This is the one that includes it standard, along with a built-in air quality monitor no other pick here has, which is the real reason it earns the premium price.
What it actually does
A built-in air quality monitor tracks things like VOCs and particulate matter directly on the thermostat's display, and the included SmartSensor reads temperature and occupancy in a separate room to even out hot and cold spots, a feature most competitors charge extra for. Scheduling, geofencing, and remote control all work through Ecobee's app, which reviewers rate close to Nest's in polish.
Who this is actually for
Someone who cares about indoor air quality as much as temperature, or a household with an uneven-heating room that a single-sensor thermostat can't solve. It's the strongest pick on this list for anyone who wants the most features without buying separate accessories later.
What to weigh before buying
- It's the priciest of the three budget-adjacent thermostats on this list, the extra sensor and air monitor are the reason.
- Some owners report the air quality readings skew more optimistic than a dedicated air quality monitor would show, treat it as a general indicator, not a lab-grade reading.
- Ecobee sells a cheaper "Enhanced" model under a similar name without the air quality monitor, confirm this is the Premium tier before buying.
The verdict
The most feature-complete thermostat on this list out of the box. Worth the premium for anyone who'd otherwise end up buying a separate sensor and air monitor anyway.