If you aren't looking for anything fancy, manual non-programmable thermostats are a great option. These are most commonly used in older homes. They feature buttons on the front that make it easy to adjust temperature settings. Manual thermostats can be analog or digital. Digital versions feature large screens for easy temperature readings.

• They are typically found in older homes.
• They are more affordable with simple controls.
• They offer limited energy savings and comfort, but can work efficiently if you're diligent about adjusting settings as the temperature changes.

Align your home's temperature and your schedule with programmable thermostats. Setting a specific temperature for your work and home hours can reduce your energy bill.

• These digital thermostats adjust the temperature automatically throughout the day.
• The best programmable thermostats can save you as much as 33 percent on heating costs, and up to 15 percent to 25 percent on cooling.
• Advanced models switch back and forth between heating and air conditioning during seasonal transitions.
• The best programmable thermostat for general use should be easy to operate. Most newer models are mercury-free with a digital interface.
• They can be set to 7-day (daily individual programs), 5-2-day (workweek vs. weekend programs), 5-1-1 (work week plus two different programs for Saturday and Sunday) and 1-week (same week-long program) options.

Tip: You can override the program's schedule as needed with many programmable thermostats.

Of all the different types of thermostats, smart thermostats are quickly becoming the most common choices. These Wi-Fi thermostats can be controlled from anywhere with a mobile device. Learning smart thermostats adapt to your schedule. They adjust your home temperature setting accordingly. This also helps lower your monthly energy costs.

The best smart thermostat for homes will vary according to your unique needs. Sticking with the same brand for all your smart devices will help the whole home operate in a unified way. There are many reasons to choose this kind of thermostat.

• Improve energy efficiency. Having ultimate control over your HVAC system allows you to adjust the temperatures according to your schedule, lowering energy costs. 
• Track your energy usage. The app for these Wi-Fi-enabled thermostats let you track energy usage. This makes it easier to tell where you can cut back to maximize efficiency. 
• Control the temperature from your computer, tablet or smartphone. Use a mobile device to adjust the temperature remotely. 
• Control the HVAC system in rental properties. If you have a vacation home or rental space, a smart thermostat is an ideal choice. Adjust the temperature when the space is vacant and track guests’ usage.
• Designed for ease of installation: Best of all, these technologically advanced thermostats are fast and easy to install. Most of them are compatible with contemporary HVAC systems. 
• Integrate with other smart home features. Once you’ve chosen the best smart thermostat for your needs, see if it’s compatible with other smart systems in your home. This way you can monitor multiple aspects of your home remotely. Smart lighting fixtures, doorbells, security systems and appliances will maximize home efficiency.

Tip: Daylight savings time ready thermostats adjust your temperature settings when the time changes.

Identify if your home is fitted with 1 Stage, 2 Stage, Direct Line Voltage, 24mV or Zone heating and cooling. This helps you determine which thermostat will be compatible. Your new thermostat will be clearly labeled with one of the following: 

• Works with 1 Stage heat or cool: For use where you have separate heating and air conditioning units.
• Works with 2 Stage or multi-stage heat or cool: For heating or cooling units that have a high and low speed.
• Works with Direct Line Voltage: 110 or 240 direct current power sources used in some older homes to power the thermostat.
• Works with 24mV: For use with a fireplace, floor or wall furnace.
• Zoned HVAC: Heating and/or cooling is individually controlled in different areas from the same HVAC system.