Digital Programmable Thermostat
A digital programmable thermostat differs from other temperature control devices in two ways. First, it does not rely on moving mechanical parts to measure temperature. Instead, it uses thermistors (thermal resistors) or other types of semiconductor devices. Second, it need not be manually reset every time you want to adjust temperature levels. It allows you to schedule the time when you want the temperature to adjust to the level that you desire.
 White Rodgers 1F78 151 Digital 5 2 Day Programmable Thermostat with Energy Manag US $19.99 |
 Honeywell Digital non programmable thermostat US $9.99 |
 Braeburn Model 1200 Non Programmable Digital Thermostat US $14.99 |
 ROBERTSHAW 5 2 DAY DIGITAL PROGRAMMABLE THERMOSTAT NEW US $16.00 |
 Filtrete 3M10 home office Digital Non programmable Heat Cool Thermostat US $9.99 |
 Hunter DIGITAL PROGRAMMABLE THERMOSTAT 44428 US $6.99 |
 Programmable Thermostat Braeburn Model 5200 Digital US $25.00 |
 digital non programmable thermostat US $45.00 |
 Gemtech GT 7000 Single Stage 7 Day Programmable Digital Heat Cool Thermostat US $17.00 |
 Honeywell TH622OD1002 Digital Programmable Heat Pump Thermostat US $.99 |
Most models allow you to load four temperature settings for one day, and these can be different for each day of the week. More expensive ones even incorporate a proportional-integral-derivative controller, or PID controller. This enables the temperature regulator to anticipate how the cooling or heating equipment will respond to its commands. If, for instance, you use a model without a PID controller and set a temperature of 21 degrees Celsius at 6:00 A.M., your heater will only start running at that time. With a PID, you will get 21 degrees Celsius at 6:00.
If you wish to switch from your old mechanical or manual unit, be sure to uninstall it properly, taking care to observe all safety measures. When you install your brand new digital programmable thermostat, be sure to follow its prescribed installation procedure as outlined in the manual. Once installed, key in your settings. You can then sit back, relax, and enjoy the warmth of your house.