What temperature is too low for thermostat?

Author: May Emmerich  |  Last update: Thursday, July 9, 2026

However, it's recommended that room temperatures do not go below 65 degrees Fahrenheit, nor above 74 degrees Fahrenheit.

How cold is too cold to set your thermostat?

The World Health Organization recommends keeping indoor temperatures between 64 and 75 degrees for healthy people. But for those who are very young, elderly or who have health problems, the minimum temperature shouldn't dip below 68, the organization says.

What is the lowest temperature house before pipes freeze?

We all know that freezing begins at 32° F or 0° C, but at what point do pipes freeze within our own homes? Temperatures only need to drop to about 20° F for a few hours to put exposed pipes at risk. So, your best bet is to insulate your exposed pipes to keep that temperature well above the freezing point.

How low is too low for a thermostat?

A common rule of thumb is that most models can function properly only above 68 degrees Fahrenheit. Any lower temperature will result in the system freezing up.

What is the coldest you should let your house get?

The World Health Organization (WHO) recommends setting your thermostat no lower than 64 degrees (F) in the Winter months while people are in the home. If there are infants or elderly individuals, they recommend keeping the temperature at 70 degrees at a minimum.

What is the ideal temperature for your home? The Answer Might Surprise You!

What temperature should I keep my house when it's below freezing?

Keep your house heated to a minimum of 65 degrees.

A temperature lower than 65 degrees might not keep the inside walls from freezing.

What is an unsafe temperature for a house?

It's advisable to keep your home below 80 degrees throughout the summer. A house that's too warm can be dangerous to people, pets, and the soft surfaces in your home. Set the winter temperature to 68 degrees when you're awake and 62 degrees when you're sleeping.

How low can you set the thermostat without pipes freezing?

The best thermostat setting for winter vacation is 50°

If you are in an area that is prone to snow and freezing temperatures, you may consider a slightly higher temperature, but no higher than 60° is necessary.

Is 68 to low for AC?

Another reason not to set your AC too low is for the sake of your health. A thermostat set to 68 degrees F or lower, can create temperature imbalances within the room. This could result in making certain areas uncomfortably cold while others remain warmer.

What is the lowest I can set my heat in the winter?

The winter thermostat setting should at minimum be between 50-55 degrees to keep your appliances and pipes from freezing. The worst way to end a vacation or wake up one morning is to a frozen dishwasher or a flooded basement.

Will pipes freeze if house is 70 degrees?

When temperatures approach zero, wind can penetrate through a small opening and can freeze nearby pipes, even thought the room temperature is 70 degrees! Insulate pipes in unheated garages and crawl spaces.

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 pipes freeze in one night?

Yes, pipes can freeze overnight if temperatures plummet drastically. Uninsulated pipes in unheated areas like attics or exterior walls are most vulnerable.

Why does my house feel cold at 20 degrees?

There may be drafts and pockets of colder air near the floor; The walls are colder and don't emit the usual amount of infrared radiation, so you lose heat due to your body emitting more IR than it receives; You may spend more time indoors and hence have less physical activity, so your body generates less heat.

What should I set my furnace to in extreme cold?

During the frigid cold temperatures, set your thermostat on a permanent HOLD around 70 degrees until the weather warms back up to normal temperatures for this season. When temperatures drop below zero or even below freezing for extended periods of time, sometimes your furnace can't keep up.

Will AC freeze up if set too low?

If your thermostat is set too low, the air conditioner will run for longer periods of time which can cause it to freeze up. To prevent this from happening, you should make sure your thermostat is set to the proper temperature. This will help your AC run more efficiently and avoid any freezing issues.

Is it OK to keep AC at 68 degrees?

Set a reasonable temperature: HVAC professionals strongly recommend never setting the thermostat lower than 68 degrees in the summer. To balance comfort and energy efficiency, the Environmental Protection Agency recommends setting your thermostat to 78 degrees when you're at home and awake.

Why is my AC set to 72 but reads 78?

Clean the Thermostat

Sometimes, when the room temperature doesn't match the thermostat setting, the problem could be dirt buildup on its interior parts. A dirt coating around the inner components may create excess heat and cause the thermostat to give the wrong readings.

What is the lowest safe temperature for a house?

The lowest temperature you can set your thermostat in winter often depends on your home's insulation and your personal comfort level. Generally, many experts recommend keeping it at least 60-65°F (15-18°C) to prevent pipes from freezing and maintain a comfortable environment.

Will pipes freeze if thermostat set at 60 degrees?

Keep the Heat On

The ideal temperature would be around 55 to 60 degrees. This will be warm enough to keep pipes from freezing.

How low is it safe to set your thermostat?

Save money on your energy bill

Instead, you can lower your thermostat to be in the 50° to 60° range to save money. That said, we don't recommend setting your thermostat any lower than 50° because it could put your pipes at risk (more on that below).

Is 68 degrees too cold 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.

What is an unsafe temperature to sleep in?

Sleeping too hot

“Heat is a huge disruptor for REM sleep,” Dr. Drerup says. With the heat of the room, your body temperature will also rise, thus undoing the sleep initiation process entirely. If your bedroom temperature is above 70° F, it's too hot.

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.

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