A ceiling fan, which can help lower utility bills by making it feel cooler.

Thirteen percent of a home’s energy costs are for cooling, according to Energy Star. Here are three easy ways to rein in these expenses—even on hot summer days.

1. Turn your fan on. Instead of setting the air conditioner to 74° F or 76° F, set it to 78° F and let your ceiling fan do the rest. It costs little to run and can make the temperature feel as much as 4 degrees cooler, according to the Department of Energy.

2. Make simple changes that increase efficiency. Close curtains during the day to keep the sun from heating up the house, reduce oven use, repair leaky AC ductwork, and plug cracks around windows and doors.

More on Air Conditioners

3. Replace your thermostat. If you have central air condition­ing, one of the most effective ways to save money on cooling is to install a programmable or smart thermostat. (As a bonus, you’ll also save money on heating this winter.)

Programmable thermostats can be set to a schedule, typically one for weekdays and another for weekends, that reduces the amount of cooling (or heating) when the house is empty or when you’re sound asleep. According to the DOE, a programmable thermostat can reduce cooling and heating bills by 10 percent.

Smart thermostats connect to the internet via WiFi and allow you to control your central air and heat with your smartphone. Some smart thermostats keep track of your temperature preferences and use the data to optimize your cooling and heating schedule. Others have multiple sensors that monitor temperatures in various parts of the house for more balanced cooling or heating.

Before investing in a smart or programmable model, check with your utility company to see whether it offers any incentives or even a free thermostat. Many offset the cost with rebates or discounts.

CR members can read on for ratings of the top three smart and programmable thermostats from our tests.

Best Smart Thermostats

Top Picks

1

Smart IQ
Automation
WiFi setup

2

Smart IQ
Automation
WiFi setup
Unlock Thermostat Ratings
Become a Member or Sign in

Best Programmable Thermostats

Top Picks

1

Manual operation
Programming
Ease of setup

2

Manual operation
Programming
Ease of setup
Unlock Thermostat Ratings
Become a Member or Sign in

Editor's Note: This article also appeared in the July 2018 issue of Consumer Reports magazine.

More on Keeping Your Cool