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Low-Voltage Thermostats
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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, V AC | 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 | 24 | 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 | 24 | 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 | 20 to 30 | 1 | 40 to 90 | Hardwire | 4" | — | — | 1 3/4" | No | Yes | Analog | Colorado | 1893K45 | 00000 | ||
For Heaters | ||||||||||||||||||
Lever Control | ||||||||||||||||||
| A | Electric | Single Stage | 24, 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 | 20 to 30 | 1 | 40 to 90 | Hardwire | 4" | — | — | 1 3/4" | No | Yes | Analog | Colorado | 1893K44 | 00000 | ||
Programmable Low-Voltage Thermostats
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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, V AC | 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 | 20 to 30 | 1 | 40 to 99 | Hardwire | 4 1/16" | 4 1/16" | 1 1/8" | Yes | No | Yes | Battery Backup, Lockable Settings | Digital | 1821K21 | 000000 | ||
Multispeed Line-Voltage Thermostats
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Control one- and two-speed line-voltage HVAC systems. Set the thermostat to activate the device’s second speed when the temperature surpasses the setting for the first speed by 3.6° F to 9° F.
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. | Temp. Differential, ° F | For Use Outdoors | Mounting Fasteners Included | Display Type | Enclosure Rating | Certification | Cannot Be Sold To | Each | |||
For Air Conditioners and Heaters | ||||||||||||||||||
Dial Control | ||||||||||||||||||
| 24 to 250 | 15 | 32 to 140 | SPDT | Hardwire | 6" | 2 3/4" | 3 3/8" | 3.6 to 9 | Yes | Yes | Analog | IP65, NEMA 4 | CE Marked | Colorado | 9207K14 | 0000000 | ||
Wi-Fi Enabled Programmable Low-Voltage Thermostats
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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 | ||
Line-Voltage Thermostats
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For Air Conditioners and Heaters |
Regulate line-voltage HVAC systems.
For Heaters—Thermostats for heaters mount to a surface-mount outlet box.
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 | Display Type | Certification | Cannot Be Sold To | Each | |||
For Air Conditioners and Heaters | ||||||||||||||||
Dial Control | ||||||||||||||||
| 24 to 277 | 22 | 40 to 90 | SPDT | Hardwire | 4 3/4" | 3" | 1 3/8" | No | Yes | Analog | UL Listed | Colorado | 1856K12 | 0000000 | ||
Hazardous Location Line-Voltage Thermostats
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Use to regulate line-voltage HVAC systems where flammable gases, vapors, and dust are present.
Hazardous Location Rating—Thermostats are rated Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G.
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 | Mounting Hole Dia. | Display Type | Hazardous Location Rating | Enclosure Rating | Certification | Cannot Be Sold To | Each | |||
For Air Conditioners and Heaters | |||||||||||||||||||
Dial Control | |||||||||||||||||||
| 24 to 277 | 22 | 50 to 90 | SPDT | Hardwire | 5 3/4" | 6 3/8" | 5 5/8" | No | No | 1/4" | Analog | NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G | NEMA 7 | CSA Certified, UL Listed | Colorado | 1877K23 | 0000000 | ||
| 24 to 277 | 22 | 50 to 90 | DPDT | Hardwire | 5 3/4" | 6 3/8" | 5 5/8" | No | No | 1/4" | Analog | NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G | NEMA 7 | CSA Certified, UL Listed | Colorado | 1877K25 | 000000 | ||
Snap-Acting Thermostats
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Also known as snap discs, these thermostats switch on cooling systems or switch off heating systems when equipment gets too hot. Each thermostat has five temperature options for switch activation; choose the one that best suits your application.
Unlike heat-actuated switches, these thermostats reset automatically, saving you the effort of replacing a melted fusible link. To calculate their reset temperature, subtract their differential temperature from the temperature you set them at. For example, a thermostat set at 100° F with a 20° F differential will reset at 80° F.
Close Switch at Temperature Setting—Normally closed thermostats are also known as high-limit thermostats—they turn off at a set temperature. They’re often used with electric water heaters, stoves, and furnaces.
Open Switch at Temperature Setting—Normally open thermostats are also known as low-limit thermostats—they turn on at a set temperature. They’re good for use with fans and blowers.
Overall | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Temp. Setting, ° F | Max. Temp. Differential, ° F | Switch Designation | Switch Starting Position | Voltage, V AC | Current, amp | Wire Connection | Terminal Size | Face Dia. | Ht. | Wd. | Dp. | Hole Diameter (No. of) | Mounting Fasteners Included | Each | |||
Close Switch at Temperature Setting | |||||||||||||||||
| 90, 100, 110, 120, 130 | 20 | SPST | 1 Off | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N11 | 000000 | ||
| 140, 150, 160, 170, 180 | 20 | SPST | 1 Off | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N12 | 00000 | ||
Open Switch at Temperature Setting | |||||||||||||||||
| 135, 145, 155, 165, 175 | 20 | SPST | 1 On | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N16 | 00000 | ||
| 135, 145, 155, 165, 175 | 40 | SPST | 1 On | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N13 | 00000 | ||
| 175, 185, 195, 205, 215 | 40 | SPST | 1 On | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N14 | 00000 | ||
| 210, 220, 230, 240, 250 | 40 | SPST | 1 On | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N15 | 00000 | ||
| 250, 260, 270, 280, 290 | 40 | SPST | 1 On | 120, 240 | 25 | Quick-Disconnect Terminal | 1/4" | 3/4" | 1 3/4" | 2" | 1 3/8" | 3/16" (2) | No | 8624N17 | 00000 | ||
