PROGRAMMABLE
PROGRAMMABLE MECHANICAL NON-PROGRAMMABLE
RTH6450D
3
RTH6350D
4
RTH2310B
5
RTH7500D
2
RTH7600D
1
RTH221B
8
RTH5100B
9
RTH111B
12
RLV310A
13
CT87K 
CT87N
14
CT50K 
CT51N 
CT53K
16
CT30A 
CT31A 
CT33A
15
CT410B
17
• Includes changeable faceplates for  
 customizing appearance ( Titanium,  
 Charcoal, Taupe )
• Enhance your home’s décor
• Easy to use 
• Backlit display
• Early start function
• Filter change reminder
• Precise temperature control of +/-1º F
• Compatible with heating and cooling systems
7-Day Programmable  
Dècor Thermostat 
RTH2520B
6
• Easy to use 
• Backlit display
• Early start function
• Filter change reminder
• Precise temperature control of +/-1º F
• Compatible with heating and 
 cooling systems
5-2 Day Programmable Thermostat 
RTH2310B
5
• TRIAC silent switching for accurate  
 temperature control of +/-1º F 
• 2-wire
• Compatible with fan-forced heaters
• Compatible with electric baseboards  
 (120-240 V), convectors and 
 radiant ceilings
5-2 Day Programmable for  
Electric Baseboard Heat Only 
RLV430A
7
• Easy to use 
• Backlit display
• Smart Response Technology
• Precise temperature control of +/-1º F
• Compatible with heating and cooling systems 
 plus heat pump systems
5-2 Day Programmable Thermostat 
RTH6350D
4
• Easy to use 
• Backlit display
• Smart Response Technology
• Precise temperature control of +/-1º F
• Auto change from heat to cool
• Compatible with heating and cooling systems 
 plus heat pump systems 
5-1-1 Day Programmable Thermostat 
RTH6450D
3
• Large, backlit digital display
• Easy-access battery door
• Auto change from heat to cool
• Setpoint is retained in the event of a power outage
• Precise temperature control of +/-1º F
• Compatible with heating and cooling systems 
 plus heat pump without back-up heat
RTH5100B 
9
• World’s most-popular thermostat 
• Precise temperature control of +/-1º F
• Available in heat only (CT87K) and  
 heat/cool models (CT87N)
• Easy to install and use
• Compatible with heating and cooling systems
The Round
™
CT87K/CT87N
14
• Easy to install and use
• Emergency and auxiliary heat light indication
• Precise temperature control of +/-1º F 
• Compatible with heat pumps with auxiliary heat
Heat Pumps Only 
RTH3100C 
11
• Snap action switching
• Precise temperature control
• Available in heat only (CT30A), Heat/cool (CT31A) 
 and 750 millivolt Heating Systems (CT33) models. 
• Compatible with heating and cooling systems
CT30A/CT31A/ 
CT33A
15
• Easy-to-read backlit display
• Set-point is retained in the event of a power outage
• Precise temperature control of +/-1º F
• Compatible with heating and cooling systems
RTH1100B
10
• Sleek, one-piece design
• Precise temperature control of +/-1º F
• Easy to use and install
• Compatible with heating and cooling systems
RTH111B 
12
• TRIAC silent switching for accurate 
 temperature control of +/-1º F
• 2 wire
• Compatible with electric baseboards 
 (120 - 240V), connectors and  
 radiant ceilings
Electric Baseboard Heat Only 
RLV310A    
13
• Easy to use touchscreen display 
• Backlit display
• Auto change from heat to cool
• Smart Response Technology
• Filter change reminder
• Precise temperature control of +/-1º F
• Permanent day & time
• Daylight saving time option
• Optional battery free installation
• Compatible with heating and cooling systems 
 plus heat pump systems
7-Day Touchscreen Programmable 
Thermostat 
RTH7600D
1
• Easy to use 
• Backlit display
• Auto change from heat to cool
• Smart Response Technology
• Filter change reminder
• Precise temperature control of +/-1º F
• Permanent day & time
• Daylight saving time optional
• Optional battery free installation
• Compatible with heating and cooling systems 
 plus heat pump systems
7-Day Programmable Thermostat 
RTH7500D   
2
DIGITAL NON-PROGRAMMABLE
RTH3100C
11
RTH1100B
10
Electric Baseboard Heat Only 
CT410B
17
• Easy to install
• Bimetal temperature sensor
• 4-wires; positive off
• Compatible with electric baseboard heat  
 (120 - 240V) and convectors (120-240V) 
• Easy to use 
• Precise temperature control of +/-1º F
• Sleek, one-piece design
• Compatible with heating and 
 cooling systems
1-Week Basic 
Programmable Thermostat 
RTH221B
8
A P RO GR AM MA BL E 
THERMOSTAT CAN SAVE YOU 
UP TO 33% OFF YOUR 
ENERGY BILL.*
RTH2520B6
RLV430A
7
* If used as directed. Savings may vary depending on 
 geographic region and usage.
• Standard model
• Precise temperature control 
• Available in heat only (CT50K) and heat/cool  
 (CT51N) models
• Also Available in Fireplace/Floor/Wall 
 Furnace (CT53K) models
• Low temperature version available with 
 scale 35º - 85º F. (CT50K1028)
• Compatible with heating and cooling systems
CT50K/CT51N/CT53K
16