Selection Guide

Large Display
Some digital thermostats have a large display, which makes it even easier to read.
Voltage
Thermostats run on either line voltage or low voltage. The easiest way to tell which type
you need is by looking at the wire. If it is a very thin wire (like a doorbell or a speaker
wire), you will need a low voltage thermostat. If it is a heavy wire, you will need a line
voltage thermostat.
Changeover Type
Thermostats either have automatic changeover or manual changeover. Thermostats
with auto changeover switch from heat to cool automatically depending on the indoor
temperature, while thermostats with manual changeover will remain on either heat or
cool until you change it.
Sensors
An indoor sensor communicates with your thermostat so that you can control the
temperature without actually mounting a thermostat in that room. Instead the small
sensor is mounted in the room and the temperature is controlled from a thermostat
mounted in the boiler room, hallway, or even hidden in a closet.
An outdoor sensor allows you to have the outdoor temperature show right on your
thermostat, so you can check the temperature without even stepping outside or turning
on the news.
Standard Display
Large Display
TH4110D1007
TH6110D1005