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| Specification | Sensi 1F87U-42WF Smart Thermostat |
|---|---|
| Brand | Sensi |
| Model | 1F87U-42WF |
| SKU | 907755 |
| Component role | Standalone |
| Lifecycle | Legacy |
| Building systems | Not specified |
| Requires | Not specified |
| Changeover modes | Automatic changeover available |
| Contact ratings | 1.5 A per terminal; 2.5 A combined maximum |
| Dimensions | 5.88 in W × 3.75 in H × 1.00 in D |
| Dual transformer support | Yes; follow the internal RH/RC jumper instructions |
| Heating and cooling stages | Conventional: up to 2H/2C; heat pump: up to 4H/2C including auxiliary heat |
| Keypad lockout | Total keypad lockout through Sensi app |
| Millivolt support | Not listed as compatible in the exact-model selection chart |
| Operating humidity | 90% RH maximum, non-condensing |
| Operating temperature | 32–105 °F |
| Power sources | Conventional heat/cool: battery with power sharing or hardwired common; heat pump, heat-only and cool-only: hardwired common |
| Remote sensor support | No remote sensor option listed in R-4552-15 |
| Schedule periods per day | Up to 8 |
| Scheduling | 7-day, non-programmable and geofencing options |
| Setpoint limits | Adjustable minimum/maximum limits |
| Setpoint range | 45–99 °F (R-4552-15 specification) |
| Supply voltage | 20–30 VAC, 50/60 Hz |