When should you turn off your thermostat?

Author: Prof. Domenica Stoltenberg  |  Last update: Sunday, February 8, 2026

We recommend turning off your heating system whenever the temperature consistently reaches 50° F outdoors. This doesn't mean you must shut off your heating system entirely. Instead, it simply means that you should be able to at least shut it off throughout the daytime hours to help save money on your energy bills.

At what temperature outside should I turn my heat off?

Our best recommendation is to shut your heating system off when the temperature outside stays at a consistent 50° Fahrenheit. While this might sound a little cold, it will actually take a couple of days until the temperature inside your home drops back down to that level.

Is it better to turn the thermostat off or down in winter?

Turn the heat down when you're away

The Energy Department says that even turning thermostats back 7 to 10 degrees from their normal settings for eight hours a day can save as much as 10% a year on homeowners' heating and cooling costs.

Is it okay to turn off the thermostat in summer?

You can set it to off, or set it to heat with a low setpoint, or use the AC mode to circulate air throughout the house. You can easily leave it off until autumn with no issue.

What's the lowest temperature you should keep your house when away?

Recommended Temperature When the Home is Vacant

For short periods of time away, like going to work, we'd recommend a temperature of around 55 – 60 degrees (F). While away on long periods of time, such as vacation, we don't recommend setting the temperature any lower than 50 degrees (F).

Does turning the thermostat off and on save energy?

Is 65 too cold for a house?

The World Health Organization recommends keeping indoor temperatures between 64 and 75 degrees Fahrenheit for healthy people. The minimum temperature should be kept above 68 degrees Fahrenheit to protect the very young, the elderly, or people with health problems. Watch out for signs of hypothermia.

What is an unhealthy house temperature?

The World Health Organization recommends a thermostat setting no lower than 68 degrees while you're home. If you have children or seniors in your house, that number increases to at least 70 degrees. If your house is too cold, it can cause problems with blood pressure and circulation, as well as affect your heart rate.

When should I turn my thermostat off?

We recommend turning off your heating system whenever the temperature consistently reaches 50° F outdoors. This doesn't mean you must shut off your heating system entirely. Instead, it simply means that you should be able to at least shut it off throughout the daytime hours to help save money on your energy bills.

Is 78 too hot for a house?

Quick answer: The ideal house temperature is room temperature, which ranges from 68 to 78 degrees F, though this may vary from season to season. In winter, the average room temperature is generally 62 to 68 degrees, whereas in the summer, the average temperature is 72 to 78 degrees.

Is 72 too cold for AC in summer?

Since 72 degrees is generally agreed upon to be an ideal indoor temperature, most people would probably still feel comfortable setting their AC units slightly higher than this, perhaps at around 75.

What happens if I turn my thermostat off?

What Happens If I Turn My Thermostat Off When I Leave Home? When you turn your thermostat off during a holiday trip, your heating, ventilation, and air conditioning (HVAC) system won't run while you're gone. As a result, your home's temperature will begin to edge up or down to match the outdoor temperatures.

Is it better to leave thermostat on auto or off?

The main benefit of setting the thermostat to 'Auto' is that it will result in more energy efficient usage. This is because the fan will run only when it's required. Also, the air filter will need to be changed or cleaned less frequently when the thermostat setting is set to 'Auto'.

What is the best thermostat schedule for summer?

Keeping in mind both energy efficiency and comfort, the best thermostat settings for summer are 76° when you are home, 80-85° when you are away and 72° at night. Then use ceiling fans in the rooms you are in to feel up to 4* cooler. Here's more on why these thermostat settings are the best.

What month to turn heating off?

Heating experts in the UK often weigh in on the ideal time to switch off heating systems. One commonly suggested date is around the end of March, a period that aligns with the changing clocks and the promise of warmer weather.

Does turning the heat on and off raise the bill?

Thermostat settings play a pivotal role in managing your heating system's efficiency. It's a common misconception that leaving your heating on at a constant temperature is more energy-efficient than turning it on and off. Does turning the heat on and off raise the bill each month? The answer is no.

What is the cheapest temperature to keep your house in winter?

To save money, aim to have your temperature set around 68-72 degrees Fahrenheit when you're at home and awake. This is a comfortable temperature for most with the help of a light sweater. Overnight and when you're out, around 64 degrees Fahrenheit will keep your home at a good temperature.

Can you sleep in 78 degrees?

“Anything under 68 degrees overall is ideal for sleep. If you get too hot in the middle of the night, reduce layers of clothing or sheets, turn on fans, or drink a little cold water.”

Is it cheaper to leave your thermostat at one temperature?

Keeping your home at a constant temperature generally means that your HVAC system will run constantly to meet it. This means that your furnace or air conditioner may run when you're asleep, at work, or out of the house. This wastes more energy than the minimal amount that you might save by having it constantly run.

Is it bad to keep AC at 80?

The suggested temperature setting by Energy Star is 85 degrees when no one is home. However, if you live in a region of the country with consistently high humidity levels, consider setting the thermostat closer to 80 so your HVAC system doesn't run as frequently.

Is it okay to turn the thermostat off in summer?

Don't ever turn off your thermostat completely off, no matter what time of year. The risks for damage to your home are too great. Instead, adjust your thermostat appropriately if you are going to leave for any extended period of time. Finding and setting the optimal temperature on your thermostat takes trial and error.

Is it better to lower thermostat or turn off?

According to the U.S. Department of Energy, homeowners can save on utility bills by turning down their thermostats before they go to sleep and during the daytime hours when/if no one is home. You can save an average of 1% on energy costs for every degree reduced on your thermostat.

Why is my AC thermostat set at 74 but reads 78?

If the temperature is set to 74°F but the thermometer shows 78°F, you will have to recalibrate the thermostat to account for this 4-degree deviation. Even with older AC units or furnaces, you might have to recalibrate your thermostat from time to time.

What temp should my house be if it's 100 outside?

During heat waves, experts, including utility companies, recommend keeping your thermostat no more than 20 degrees cooler than the outdoor temperature. For instance, if it's 100 degrees outside, aim to set your thermostat to at least 80 degrees.

Why does my house feel cold at 73?

If you're cold even though your thermostat indicates you shouldn't be, your furnace likely isn't the problem. In most cases, it's working just fine. It's your home that needs attention. Lack of insulation, severe air leakage, and/or unbalanced ductwork are frequently to blame.

How hot is too hot inside a house for dogs?

All other dogs must have some method of conserving body heat (such as dry bedding, solid resting surfaces, heat lamps, or other provisions) if the temperature is less than 50 °F. Dogs cannot be housed in temperatures above 85 °F for more than 4 consecutive hours.

Previous article
Does Dawn dish soap help unclog a toilet?
Next article
Is borax toxic as laundry detergent?