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Product Specifications:
| Item | Low Voltage Thermostat |
| Agency Compliance | Energy Aware |
| Application | Heat And Cool |
| Backlit Screen | Yes |
| Backlit Screen Color | Gray |
| Backlit Type | Touch Activated Or Continuous With Common Wire |
| Batteries Included | Yes |
| Battery Backup | Yes |
| Battery Type | AA Battery |
| Changeover Type | Automatic |
| Color | Gray |
| Compatible System Type | Electric Forced Air Furnaces, Gas Forced Air Furnaces, Heat Pump With Aux, Hydronic Systems, Millivolt |
| Contact Rating | 20-30V AC |
| Control Range | 45° to 99° |
| Control Type | Push Button |
| Dehumidification Control | Yes |
| Depth | 1 1/8" |
| Differential Cool | 0.9°F, 1.2°F, 1.7°F |
| Differential Heat | 0.5°F, 0.75°F, 1.9°F |
| Differential Type | Adjustable |
| Digit Size | Easy Read |
| Display Color | Gray |
| Display Size | 4.81 sq. in. |
| Display Type | Digital |
| Dual Transformer Compatible | Yes |
| Electrical Connection Type | Hardwired |
| Fan Settings | Auto-On |
| Fan Switching | Auto-On |
| Filter Change Reminder | Yes |
| Frequency | 50/60 Hz |
| Green Certification Or Other Recognition | Energy Aware |
| Height | 3 3/4" |
| Housing Color | Gray |
| Humidification Control | No |
| Includes | Mounting Hardware |
| Includes Positive Off | Yes |
| Key Features | Adjustable Heat/Cool Temperature Limits, High Contrast Backlight |
| Key Pad Lockout | Yes |
| Low Battery Indicator | Yes |
| Maximum Control Temperature | 99°F |
| Maximum Operating Humidity | 90% |
| Maximum Operating Temperature | 105°F |
| Millivolt Compatible | Yes |
| Minimum Control Temperature | 45°F |
| Minimum Operating Humidity | 0% |
| Minimum Operating Temperature | 32°F |
| Mounting Direction | Horizontal |
| Mounting Location | Wall |
| Mounting Type | Horizontal |
| Number Of Cooling Stages - Conventional System | 2 |
| Number Of Cooling Stages - Heat Pump System | 2 |
| Number Of Heating Stages - Conventional System | 2 |
| Number Of Heating Stages - Heat Pump System | 4 |
| Number Of Zones | 1 |
| Overall Depth | 1 1/8" |
| Overall Height | 3 3/4" |
| Overall Width | 6" |
| Power Method | Battery |
| Programming Capability | 5-1-1, 5-2, 7 Days |
| Programs Per Week | 7 |
| Remote Sensing Capability | No |
| Requires C-wire | Yes |
| Sensor Location | Remote |
| Shape | Rectangle |
| Smart Connectivity | No Connectivity |
| Stages Conventional | 2 H/2 C Conventional |
| Stages Heat | 4 |
| Stages Heat Pump | 4 H/2 C Heat Pump |
| Stages Heating/cooling | 2 H/2 C Conventional, 4 H/2 C Heat Pump |
| System Settings | Auto Cool Heat Off |
| System Switching | Auto-Heat-Cool-Off |
| Temp. Control Range | +45°F to +99°F |
| Temp. Settings Per Day | 4 |
| Temp. Settings Per Day | 4.0 |
| Temperature Differential | 0.6°F, 1.2°F |
| Temperature Limiting | Yes |
| Temperature Readout | Yes |
| Temperature Scale | Fahrenheit, Celsius |
| Temperature Sensitivity | -1°F to +1°F |
| Temperature Settings Per Day | 0, 2, 4 |
| Temporary Program Override | Yes |
| Temporary Temperature Hold | Yes |
| Terminal Designations | C, G, L, O/B/6, Rc, Rh, W/E, W2, Y, Y2 |
| Thermostat Type | Low Voltage |
| Voltage | 20-30V AC |
| Width | 6" |
Shipping Info:
| Ship weight (kg) | 0.28 |
| Ship height (cm) | 9.53 |
| Ship length (cm) | 2.86 |
| Ship width (cm) | 15.24 |
| Country of Origin | MX |
Product Variants
| Product | Model | Application | Programming Capability | Overall Width | Voltage | Key Pad Lockout | Color | Depth | Height | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
01F97 1277 | Heat And Cool | 5-1-1, 7 Days | 5 13/16" | 20-30V AC | Yes | White | 1 1/4" | 4 5/8" | €369.36 | |
![]() |
01F78 151S1 | Heat And Cool | 5-2 | 5 1/8" | 20-30V AC | No | White | 1 1/8" | 3 1/4" | €107.45 | |
![]() |
1F85U-42NP | Heat And Cool | Not Programmable | 6" | 20/30V AC | Yes | Gray | 1 1/8" | 3 3/4" | €141.41 | |
![]() |
1F85U-22PR | Heat And Cool | 5-1-1, 5-2, 7 Days | 6" | 20-30V AC | Yes | Gray | 1 1/8" | 3 3/4" | €234.56 | |
![]() |
1F83C-11NP | Heat Or Cool | Not Programmable | 6" | 20V AC | Yes | Gray | 1 1/8" | 3 3/4" | €90.52 | |
![]() |
1F83C-11PR | Heat And Cool | 5-1-1, 5-2, 7 Days | 6" | 20-30V AC | Yes | Gray | 1 1/8" | 3 3/4" | €153.58 |
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Contact us
Contact your account manager right away to get personal advice.
We're available Monday through Friday, from 07:30 until 17:00.
EMERSON 1F85U-42PR Low Voltage Thermostat, Stages Cool 2, Stages Heat 4
€232.05 /unit




