Selection Guide

Thermostat Buying Guide

Shopping for a thermostat? There are many factors to consider when deciding which

thermostat is right for you. The main differences are programmability, the applications

they are used for, number of stages, user interface, mount, voltage, changeover type

and ability to work with sensors.

Programmability

Programmable thermostats save energy, save you money and maximize comfort based

on your unique schedule! They typically have four setpoints, allowing you to set different

temperatures for the morning, daytime, evening and over night. Most programmable

thermostats can operate in a non-programmable mode if you choose not to set a

program.

7 Day Different settings for every day of the week

5-1-1 Day Monday thru Friday setting, Saturday setting,

Sunday setting

5-2 Day

Weekday setting, Weekend setting

Non-programmable Temperature can only be adjusted manually

Applications

• Heat Only- works only with a single heating source

• Cool Only- works only with a single cooling source

• Single Stage Heat/Cool- controls one heating source and one cooling source

• Multi-Stage Heat/Cool- controls multiple heating and cooling sources

• Electric Heat/Line Voltage- controls electric baseboard and electric heaters

• Heat Pump- used in heat pump applications, such as air source heat pumps and

ground source heat pumps; they can be single or multi-stage

• Fan Coil- work with fan coil units, such as unit ventilators

• Millivolt- used to regulate systems that utilize a pilot light rather than an electrical

circuit, such as a gas-fired water heater

Note: If you have a heat pump, electric heat or millivolt system, it is important to select

a thermostat that is compatible with this specific type of system.

PAGE 1
Thermostat Buying Guide Shopping for a thermostat? There are many factors to consider when deciding which thermostat is right for you. The main differences are programmability, the applications they are used for, number of stages, user interface, mount, voltage, changeover type and ability to work with sensors.
PAGE 2
Number of Stages This refers to the number of heating or cooling sources that may be controlled by a single thermostat. For example, if a system contains baseboard heat, a hot air system and air conditioning, then there are two heating stages and one cooling stage. In this example, a 2 heat/1 cool thermostat should be installed. Note: If you have auxiliary heat (backup heat, such as a fan coil or baseboard), that counts as a second heating source.
PAGE 3
Large Display Some digital thermostats have a large display, which makes it even easier to read. Large Display TH4110D1007 Standard Display TH6110D1005 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.