Smart Thermostats with Accuracy of 0.35 or Less
ENERGY STAR certified smart thermostats whose listed static temperature accuracy is 0.35 or smaller. The cut-off is an editorial label; the figure is the listed deviation, not a promise about room comfort.
At a glance
Matching models32 of 115 (28%)
Brands in the list15
Temperature accuracy (static, as listed)0.06 – 0.35 median 0.31
Network standby (W)0.06 – 1.99 median 0.83
Most listings come from TCC (5), First Alert (3), Google Nest (3), Resideo (3). Counts and ranges are calculated from the same official fields as the table below.
How models are selected
Rule: static temperature accuracy ≤ 0.35 (smaller is a smaller listed deviation). Models with no value for the field are left out; a missing value is never treated as zero. The list is sorted by Temperature accuracy, lowest first, which is an ordering and not a recommendation.
32 matching models
| Model | Connectivity | Temperature accuracystatic, as listed | Network standbyW | Control featureslisted |
|---|---|---|---|---|
| Vivint TH03 | Zigbee | 0.06 | 0.09 | 3 |
| Google Nest GA05###- | Bluetooth, Other, Wi-Fi | 0.09 | 0.1 | 5 |
| TCC TH8320R | Other | 0.1 | 0.14 | 4 |
| TCC TH8110R | Other | 0.12 | 0.14 | 4 |
| TCC THX9421R | Other | 0.12 | 1.38 | 5 |
| Verdant VX3-TW- | Bluetooth, Zigbee, Other | 0.17 | 0.82 | 6 |
| Verdant ZX-TW- | Bluetooth, Zigbee, Other | 0.18 | 0.83 | 6 |
| Alarm.com ADC-T40K-HQ-AT | Bluetooth, Other, Wi-Fi, Z-Wave | 0.19 | 1.99 | 5 |
| Enphase IQ-TH-PZ-01-BVE | Bluetooth, Other, Wi-Fi, Z-Wave | 0.19 | 1.99 | 5 |
| TCC TH8321WF | Wi-Fi | 0.2 | 0.17 | 4 |
| Source1 SHC350 | Wi-Fi | 0.23 | 1.39 | 2 |
| TCC TH8321R | Other | 0.25 | 0.13 | 5 |
| Verdant VX3-TR- | Bluetooth, Zigbee, Other | 0.26 | 0.18 | 6 |
| Google Nest T3### | Wi-Fi | 0.27 | 0.06 | 4 |
| Google Nest GA0####- | Wi-Fi | 0.3 | 0.1 | 4 |
| Vivint TH02 | Z-Wave | 0.3 | 0.22 | 3 |
| Amazon S6ED3R | Bluetooth, Other, Wi-Fi | 0.31 | 0.89 | 3 |
| GE 93129894 | Wi-Fi | 0.33 | 0.43 | 2 |
| GE 93130061 | Wi-Fi | 0.33 | 0.43 | 2 |
| Pro1 L50-991 | Wi-Fi | 0.33 | 0.51 | 1 |
| Pro1 T721i | Wi-Fi | 0.33 | 0.51 | 1 |
| Vive TP-S-721i | Wi-Fi | 0.33 | 0.51 | 1 |
| Alarm.com B36-T10 | Z-Wave | 0.35 | 1.11 | 8 |
| First Alert RCHT9*10WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| First Alert TH6320WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| First Alert THX***WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| Fisrt Alert RCHT9*10WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| Honeywell Home TH6320WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| Honeywell Home THX***WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| Resideo RCHT9*10WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| Resideo TH6320WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
| Resideo THX***WF | Other, Wi-Fi | 0.35 | 1.65 | 5 |
Related shortlists and tools
- Smart Thermostats with an Occupancy Sensor 50 models
- Smart Thermostats with Extra Temperature Sensor 53 models
- Smart Thermostats with Outdoor Temp Detection 59 models
- Smart Thermostats with Wi-Fi 97 models
- Low-Standby Smart Thermostats (0.5 W or Less) 49 models
- Smart Thermostats with Humidity Sensing 70 models
- Heating: what matters when choosing
Sources
- ENERGY STAR product guidance for smart thermostats (data.energystar.gov, updated 2026-11-06)
We compile and compare published data; we do not run our own product tests. See How We Compare.