Sensi Lite Smart Thermostat ST25 (Black) vs Sensi Touch 2 Smart Thermostat ST76 (Black)
These are side-by-side facts taken from each product guide: published specifications, strengths and caveats as their sources state them. This page is not a test, a ranking or a verdict about which model is better.
Sensi Lite Smart Thermostat ST25 (Black)
Single-stage or one-extra-stage 24 VAC systems on a 2.4 GHz network
Copeland's Sensi Lite thermostat, confirmed by matching UPC. It handles 1H/1C, 1H/2C or 2H/1C conventional systems and 2H/1C heat pumps. Copeland and the listing agree that heat-only, cool-only and heat pump systems need a C wire. Setup requires the Sensi app and an account; the warranty is three years for DIY or pro installs.
Published specifications
- Maker: stages 1H/1C, 1H/2C or 2H/1C conventional; heat pump 2H/1C; 3-wire zone heat
- Maker and listing: C wire required for heat-only, cool-only and heat pump systems
- Maker: 24 VAC, 20-30 Vac rating; hardwire with power stealing; 2 x AAA included
- Guide: Wi-Fi 2.4 GHz only; Sensi app and account required; Alexa, Google Assistant, SmartThings
- Maker: 5.07 x 3.13 x 0.88 in; 7-day schedule, 8 periods a day; geofencing; keypad lockout
- Maker warranty table: 3 years, DIY or professional install
Strengths
- Listing and maker agree on exactly which systems need a C wire
- Three-year warranty applies whether you or a contractor installs it
- UPC matches Copeland's product page, which publishes a specification block
Caveats
- Only one extra stage: no 2H/2C, and no two-stage heat pump support
- Heat pump, heat-only and cool-only systems need a C wire
- Requires the Sensi app, an account and a 2.4 GHz network to set up
Read the full Sensi Lite Smart Thermostat ST25 (Black) guide
Sensi Touch 2 Smart Thermostat ST76 (Black)
Homes with a C wire and up to 2H/2C or 4H/2C heat pump equipment
Copeland's glass-touchscreen Sensi thermostat, confirmed by matching UPC. It lists 1H/1C, 2H/2C and 4H/2C heat pump staging, humidifier and dehumidifier control, and up to fifteen optional room sensors. Every system needs a C wire. Copeland's page lists 5 GHz Wi-Fi, but the installation guides say 2.4 GHz only.
Published specifications
- Maker: stages 1H/1C, 2H/2C; heat pump 4H/2C; humidification and dehumidification; dual fuel logic
- Listing, spec sheet and guides: C wire required; 20-30 Vac, 24 VAC; batteries not included
- Wi-Fi: maker page 2.4 and 5 GHz; installation guides 2.4 GHz only; Bluetooth LE
- Sensors: up to 15 Sensi room sensors, sold separately; outdoor sensor option for aux lockout
- Maker: 5.60 x 3.25 x 0.77 in; 8 sq in glass touchscreen; spec sheet: Alexa, Google Assistant, SmartThings
- Maker warranty table and spec sheet: 3 years, DIY or professional install
Strengths
- Copeland lists up to 2H/2C conventional and 4H/2C heat pump staging, plus humidity control
- Works with up to fifteen optional Sensi room sensors
- Three-year warranty applies whether you or a contractor installs it
Caveats
- A C wire is required on every system
- Maker page lists 5 GHz Wi-Fi but the installation guides say 2.4 GHz only
- Setup requires the Sensi app, an account and Bluetooth on your phone
Read the full Sensi Touch 2 Smart Thermostat ST76 (Black) guide
How to choose between them
Choose the Sensi Lite Smart Thermostat ST25 (Black) if your situation matches: Single-stage or one-extra-stage 24 VAC systems on a 2.4 GHz network. Its main caveat: Only one extra stage: no 2H/2C, and no two-stage heat pump support.
Choose the Sensi Touch 2 Smart Thermostat ST76 (Black) if your situation matches: Homes with a C wire and up to 2H/2C or 4H/2C heat pump equipment. Its main caveat: A C wire is required on every system.
Both entries repeat what each guide records. Confirm the model, included parts and availability on the current listing before ordering.
Primary sources
- Copeland product page and specifications for Sensi Lite Smart Thermostat ST25 Source for Sensi Lite Smart Thermostat ST25 (Black)
- Sensi Lite installation guide R-5664 (ST25 series) supplied with the Amazon listing Source for Sensi Lite Smart Thermostat ST25 (Black)
- Copeland Sensi warranty table by model Source for Sensi Lite Smart Thermostat ST25 (Black) and Sensi Touch 2 Smart Thermostat ST76 (Black)
- Copeland product page and specifications for Sensi Touch 2 ST76 Source for Sensi Touch 2 Smart Thermostat ST76 (Black)
- Sensi Touch 2 installation guide R-5556-4 (November 2024) on Copeland's media server Source for Sensi Touch 2 Smart Thermostat ST76 (Black)
- Sensi Touch 2 installation guide R-5556 (August 2022) supplied with the Amazon listing Source for Sensi Touch 2 Smart Thermostat ST76 (Black)
- Sensi Touch 2 spec sheet R-5530 supplied with the Amazon listing Source for Sensi Touch 2 Smart Thermostat ST76 (Black)
Primary sources checked .