Smart Thermostats · owner-verdict comparison

ecobee Smart Thermostat Premium vs Honeywell Home T6 Pro: what real owners say

Real owners lean toward the Honeywell Home T6 Pro: 87% of 38 owners recommend it, vs 61% of 111 for the ecobee Smart Thermostat Premium.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

ecobee Smart Thermostat Premium

61%of 111 owners recommend
61% recommend · 8% neutral · 31% don't
Owners praise
  • Premium build with a large, sharp touchscreen and polished interface
  • Deep, granular HVAC control and customization, including multi-stage and heat-pump setups
  • Strong HomeKit and Home Assistant integration for local control
Owners complain about
  • Automatic "smarts" feel over-aggressive and erratic, so many owners disable them
  • Onboard temperature reading runs off by several degrees
  • Heat-pump and dual-fuel staging can misbehave, delaying or skipping heat
Full owner report →

Honeywell Home T6 Pro

87%of 38 owners recommend
87% recommend · 2% neutral · 11% don't
Owners praise
  • Excellent Z-Wave and local smart-home control (Home Assistant, SmartThings)
  • Reliable and dependable, with solid uptime
  • Handles almost any HVAC setup (multi-stage, heat pump, humidifier, fan); no C-wire needed
Owners complain about
  • Interface and app feel dated; T6 Pro lags newer models
  • Can be finicky, with the occasional bad unit
  • Temperature and humidity readings can be quirky after configuration
Full owner report →

Which should you buy?

Get the ecobee Smart Thermostat Premium if
  • ✓HomeKit users wanting a top-tier smart thermostat
  • ✓Owners of heat-pump or multistage HVAC systems
  • ✓Tinkerers who want deep customization and data tracking
  • ✓People adding room sensors for cross-floor comfort
Skip it if
  • Anyone wanting a simple set-and-forget thermostat
  • Buyers relying on its air-quality or CO2 readings
Get the Honeywell Home T6 Pro if
  • ✓Home-automation users on Z-Wave or Home Assistant
  • ✓People who want a thermostat that works without wifi or internet
  • ✓HVAC installers wanting broad multi-stage, heat-pump, and C-wire-free compatibility
  • ✓12V furnace or no-C-wire setups needing local control
Skip it if
  • Buyers wanting a polished touchscreen and app UI like the T10
  • People choosing the WiFi version over the Z-Wave model

What ecobee Smart Thermostat Premium owners say

“It worked great.”
— @drsmith1988 on YouTube
“That was the primary reason I switched to ecobee from nest, it’s not an exaggeration to say it was driving me insane how much it was triggering the AC to only have a 1 degree differential”
— @hayleyharrison5127 on YouTube
“Yet this $250 thermostat is just making random guesses at CO2 based on VOC which don't always correlate well.”
— ten10thsdriver on Reddit

What Honeywell Home T6 Pro owners say

“I've had great experience with my Honeywell T6 Pro (Z-Wave). Pros: - It works 100% without internet / wifi - You can still expose it to the internet (and Google Home) via Home Assistant if you want - It works perfectly fine as a 'dumb' thermostat - Honeywell is a reputable thermostat brand compared to some sketchy brands you find in the 'Smart Thermostat'”
— MrKhalos on Reddit
“When I logged into hass the next time it said "We found a new homekit device: Thermostat". Please note, I don't do homekit despite having all apple devices. Two clicks and a code read off the screen and I had a thermostat in hass.”
— MrCharismatist on Reddit
“I have honewellhome app but it doesn’t work.”
— @catherinesmith48 on YouTube

ecobee Smart Thermostat Premium vs Honeywell Home T6 Pro: frequently asked questions

Is the ecobee Smart Thermostat Premium or the Honeywell Home T6 Pro better?

Real owners lean toward the Honeywell Home T6 Pro: 87% of 38 owners recommend it, vs 61% of 111 for the ecobee Smart Thermostat Premium.

Who should get the ecobee Smart Thermostat Premium?

Owners point the ecobee Smart Thermostat Premium at homeKit users wanting a top-tier smart thermostat, and owners of heat-pump or multistage HVAC systems.

Who should get the Honeywell Home T6 Pro?

Owners point the Honeywell Home T6 Pro at home-automation users on Z-Wave or Home Assistant, and people who want a thermostat that works without wifi or internet.

What do owners complain about?

The most-cited downside of the ecobee Smart Thermostat Premium is automatic "smarts" feel over-aggressive and erratic, so many owners disable them. For the Honeywell Home T6 Pro, it's interface and app feel dated; T6 Pro lags newer models.