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Voltage
Thermostat Type
Control Type
For System Efficiency
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Export Control Classification Number (ECCN)
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
DFARS Specialty Metals
Low-Voltage Thermostats
 |  |
Style A | Style B |
These thermostats work with low-voltage HVAC systems that have only one speed.
Style A—Style A thermostats mount vertically or horizontally.
Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.
For System | Overall | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Style | Type | Efficiency | Voltage | Current, amp | Temp. Setting, ° F | Electrical Connection Type | Dia. | Ht. | Wd. | Dp. | For Use Outdoors | Mounting Fasteners Included | Display Type | Cannot Be Sold To | Each | |||
For Air Conditioners | ||||||||||||||||||
Lever Control | ||||||||||||||||||
| A | Electric | Single Stage | 24V AC | 1 | 50 to 90 | Hardwire | — | 5" | 3 1/4" | 1 3/8" | No | Yes | Analog | Colorado | 17225K52 | 000000 | ||
For Air Conditioners and Heaters | ||||||||||||||||||
Lever Control | ||||||||||||||||||
| A | Electric Gas Oil | Single Stage | 24V AC | 1 | 50 to 90 | Hardwire | — | 5" | 3 1/4" | 1 3/8" | No | Yes | Analog | Colorado | 17225K57 | 00000 | ||
Dial Control | ||||||||||||||||||
| B | Electric Gas Oil | Single Stage | 20V AC to 30V AC | 1 | 40 to 90 | Hardwire | 4" | — | — | 1 3/4" | No | Yes | Analog | Colorado | 1893K45 | 00000 | ||
For Heaters | ||||||||||||||||||
Lever Control | ||||||||||||||||||
| A | Electric | Single Stage | 24V AC, Millivolt | 1 | 50 to 90 | Hardwire | — | 5" | 3 1/4" | 1 3/8" | No | Yes | Analog | Colorado | 17225K51 | 00000 | ||
Dial Control | ||||||||||||||||||
| B | Gas Oil | Single Stage | 20V AC to 30V AC | 1 | 40 to 90 | Hardwire | 4" | — | — | 1 3/4" | No | Yes | Analog | Colorado | 1893K44 | 00000 | ||
Programmable Low-Voltage Thermostats
 |  |
Push Button | Touchpad |
Set these thermostats to adjust the temperature at certain times each day. They control low-voltage HVAC systems. You can lock the settings to prevent unwanted or accidental changes, which is helpful in public areas. If the power fails, these thermostats have battery backup to retain your program.
Touch-Pad Control—Touchpad thermostats can be used with a remote sensor (sold separately) that takes temperatures up to 300 ft. from the thermostat.
For Single Stage System Efficiency—Single-stage thermostats work with systems that have only one speed.
For Multistage System Efficiency—Multistage thermostats work with systems that have up to three heating speeds and two cooling speeds.
Daily Program Function—Thermostats with a daily program function can have an individual program for each day of the week.
For System | Overall | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Type | Efficiency | Program Function | Voltage | Current, amp | Temp. Setting, ° F | Electrical Connection Type | Ht. | Wd. | Dp. | Batteries Included | For Use Outdoors | Mounting Fasteners Included | Features | Display Type | Each | |||
For Air Conditioners and Heaters | ||||||||||||||||||
Push-Button Control | ||||||||||||||||||
| Electric Gas Heat Pump Oil | Single Stage | Weekday/Saturday/Sunday | Millivolt to 30V AC | 1.5 | 45 to 99 | Hardwire | 3 3/4" | 6" | 1 1/8" | Yes | No | Yes | Battery Backup, Lockable Settings | Digital | 1821K34 | 000000 | ||
Touch-Pad Control | ||||||||||||||||||
| Electric Gas Heat Pump Oil | Single Stage | Daily | Millivolt to 30V AC | 1.5 | 45 to 99 | Hardwire | 4 5/8" | 5 7/8" | 1 1/4" | Yes | No | Yes | Battery Backup, Lockable Settings | Digital | 1821K17 | 000000 | ||
| Electric Gas Heat Pump Oil Steam | Multistage | Daily | Millivolt to 30V AC | 1.5 | 45 to 99 | Hardwire | 4 5/8" | 5 7/8" | 1 1/4" | Yes | No | Yes | Battery Backup, Lockable Settings | Digital | 1821K19 | 000000 | ||
For Heaters | ||||||||||||||||||
Push-Button Control | ||||||||||||||||||
| Electric Gas Heat Pump Oil Steam Water | Single Stage | Daily, Weekday/Weekend, Weekday/Saturday/Sunday | 20V AC to 30V AC | 1 | 40 to 99 | Hardwire | 4 1/16" | 4 1/16" | 1 1/8" | Yes | No | Yes | Battery Backup, Lockable Settings | Digital | 1821K21 | 000000 | ||
Tamper-Resistant Line-Voltage Thermostats
 |  |
Thermostat with Tamper-Resistant Guard Removed |
A built-in guard prevents accidental changes and other tampering and protects these thermostats from damage. These thermostats regulate the temperature in HVAC systems that use direct electrical power. They’re often used with baseboard and wall heaters.
DPST—DPST (double pole, single throw) thermostats control two circuits, so they have an “off” setting that cuts power to the thermostat. As a result, they’re more energy efficient and slightly safer than SPST (single pole, single throw) thermostats, which stay at a low setting instead of turning off completely.
Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.
Overall | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Voltage, V AC | Current, amp | Temp. Setting, ° F | Switch Designation | Electrical Connection Type | Ht. | Wd. | Dp. | For Use Outdoors | Mounting Fasteners Included | Features | Display Type | Certification | Cannot Be Sold To | Each | |||
For Heaters | |||||||||||||||||
Dial Control | |||||||||||||||||
| 120 to 277 | 22 | 50 to 90 | SPST | Hardwire | 4 9/16" | 2 13/16" | 1 3/4" | No | No | Tamper-Resistant Guard | Analog | ETL Listed | Colorado | 5474N11 | 000000 | ||
| 120 to 277 | 22 | 50 to 90 | DPST | Hardwire | 4 9/16" | 2 13/16" | 1 3/4" | No | No | Tamper-Resistant Guard | Analog | ETL Listed | Colorado | 5474N12 | 00000 | ||
Thermostat Guards
Plastic
 |  |  |
Ring Base | Solid Base | Solid Base and Ring Base |
Thermostat Guards | Extra Keys | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Solid Base—For Max. Thermostat | Ring Base—For Max. Thermostat | |||||||||||||||
Cover Type | Ht. | Wd. | Dp. | Ht. | Wd. | Dp. | Color | Mounting Position | No. of Keys Included | Each | Pkg. Qty. | Pkg. | ||||
Ring Base | ||||||||||||||||
| Snap On | — | — | — | 5 1/4" | 5 1/4" | 3 1/4" | Clear | Horizontal, Vertical | 2 | 1852K102 | 000000 | — | ——— | 0 | ||
| Snap On | — | — | — | 6 1/4" | 4 1/4" | 3 1/4" | Clear | Horizontal, Vertical | 2 | 1852K101 | 00000 | — | ——— | 0 | ||
Solid Base | ||||||||||||||||
| Snap On | 3 7/8" | 3 1/2" | 2 1/2" | — | — | — | Clear | Horizontal, Vertical | 1 | 1852K61 | 00000 | 2 | 1852K6 | 00000 | ||
Solid Base and Ring Base | ||||||||||||||||
| Snap On | 5 1/4" | 4 5/8" | 3" | 5 1/4" | 4 5/8" | 3 1/4" | Clear | Horizontal, Vertical | 1 | 1852K62 | 00000 | 2 | 1852K6 | 0000 | ||
| Snap On | 6 3/8" | 3 1/2" | 3" | 6 3/8" | 3 1/2" | 3 1/4" | Clear | Horizontal, Vertical | 1 | 1852K63 | 00000 | 2 | 1852K6 | 0000 | ||
| Snap On | 7 5/8" | 4 1/4" | 2 1/8" | 7 1/16" | 4 1/8" | 2 1/4" | Clear | Horizontal, Vertical | 1 | 1852K641 | 00000 | 2 | 1852K6 | 0000 | ||
| Snap On | 8 1/4" | 5 3/8" | 3 1/2" | 8 1/8" | 4 5/8" | 3 5/8" | Clear | Horizontal, Vertical | 1 | 1852K65 | 00000 | 2 | 1852K6 | 0000 | ||
Painted Steel
 |  |  |  |
Ring Base Hinged Cover | Ring Base Snap-On Cover | Solid Base Hinged Cover | Solid Base Snap-On Cover |
Thermostat Guards | Extra Keys | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Max.Thermostat | |||||||||||||
Cover Type | Ht. | Wd. | Dp. | Color | Mounting Position | No. of Keys Included | Each | Pkg. Qty. | Pkg. | ||||
Ring Base | |||||||||||||
| Hinged | 6" | 3 13/16" | 3 1/8" | Beige | Horizontal, Vertical | 1 | 1852K68 | 000000 | 2 | 1852K6 | 00000 | ||
| Snap On | 6 5/8" | 4 1/2" | 3 3/8" | Beige | Horizontal, Vertical | 1 | 1852K69 | 00000 | 2 | 1852K6 | 0000 | ||
Solid Base | |||||||||||||
| Hinged | 6 1/4" | 4 3/4" | 3" | Beige | Horizontal, Vertical | 1 | 1852K66 | 00000 | 2 | 1852K6 | 0000 | ||
| Snap On | 7 1/8" | 4 5/8" | 3 1/4" | Beige | Horizontal, Vertical | 1 | 1852K67 | 00000 | 2 | 1852K6 | 0000 | ||
Programmable Line-Voltage Thermostats
 |
Set these thermostats to adjust the temperature at certain times each day. They regulate heaters that use direct electrical power, such as baseboard and wall heaters.
For System | Overall | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Type | Efficiency | Program Function | Voltage, V AC | Current, amp | Temp. Setting, ° F | Switch Designation | Electrical Connection Type | Ht. | Wd. | Dp. | For Use Outdoors | Mounting Fasteners Included | Display Type | Each | |||
For Heaters | |||||||||||||||||
Push-Button Control | |||||||||||||||||
| Electric | Single Stage | Daily | 120 | 16 | 40 to 86 | SPST | Hardwire | 4 7/8" | 2 3/4" | 7/8" | No | Yes | Digital | 5294N11 | 0000000 | ||
| Electric | Single Stage | Daily | 240 | 15 | 40 to 86 | DPST | Hardwire | 4 7/8" | 2 3/4" | 7/8" | No | Yes | Digital | 5294N13 | 000000 | ||
| Electric | Single Stage | Daily | 240 | 16 | 40 to 86 | SPST | Hardwire | 4 7/8" | 2 3/4" | 7/8" | No | Yes | Digital | 5294N12 | 000000 | ||
Wi-Fi Enabled Programmable Low-Voltage Thermostats
 |  |
Push Button | Touchpad |
 | |
Touchpad with Remote Sensor |
Control, monitor, and program your HVAC system from anywhere. These thermostats connect to a Wi-Fi network, so you can use a computer, tablet, or smartphone to view and adjust settings. You can also lock the settings to prevent accidental changes or tampering in public areas. They control low-voltage, multistage HVAC systems that have up to three heating and cooling speeds. Use them to set an individual program for each day of the week.
Temperature Control Location Sensing—Location-sensing thermostats connect to an app that tracks the location of your mobile device. They can automatically adjust the temperature based on your distance from the thermostat. Use the app to send push notifications for service reminders, unexpected temperature changes, and interruptions to the Wi-Fi connection.
Humidity/Temperature Sensor—Thermostats with a humidity/temperature sensor also detect motion. Place the remote sensor in a room or enclosure to maintain a consistent climate. To help save energy, they can raise or lower the temperature when no motion is detected.
Thermostats | Replacement Temperature and Humidity Sensors | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For System | Overall | |||||||||||||||||
Type | Efficiency | Voltage, V AC | Current, amp | Temp. Control Type | Temp. Setting, ° F | Ht. | Wd. | Dp. | Sensor Type | Mounting Fasteners Included | Features | Each | Pkg. Qty. | Pkg. | ||||
For Air Conditioners and Heaters | ||||||||||||||||||
Push-Button Control | ||||||||||||||||||
| Electric Gas Heat Pump Oil | Multistage | 20 to 30 | 1.5 | — | 45 to 99 | 3 3/4" | 5 7/8" | 1" | Built In | Yes | Lockable Settings | 1821K33 | 0000000 | — | ——— | 0 | ||
Touch-Pad Control | ||||||||||||||||||
| Electric Gas Heat Pump Oil Steam | Multistage | 18 to 30 | 1 | — | 40 to 99 | 3 1/2" | 4 1/2" | 7/8" | Built In | Yes | Lockable Settings | 1821K31 | 000000 | — | ——— | 0 | ||
For Air Conditioners, Fans, and Heaters | ||||||||||||||||||
Touch-Pad Control with Mobile-App-Notification Alert | ||||||||||||||||||
| Electric Gas Heat Pump Oil Steam | Multistage | 20 to 30 | 1 | Location Sensing | 40 to 99 | 4" | 4" | 1" | Built In | Yes | Lockable Settings | 1821K41 | 000000 | — | ——— | 0 | ||
| Electric Gas Heat Pump Oil Steam | Multistage | 20 to 30 | 1 | Location Sensing | 40 to 99 | 5" | 3 3/4" | 1" | Built In, Remote | Yes | Humidity/Temperature Sensor, Lockable Settings | 1821K43 | 000000 | 2 | 1821K403 | 0000000 | ||
