Room Thermometers

Room Thermometers

A thermometer

What is a thermometer?

A thermometer measures the temperature of something.

A lady in a wheelchair, a lounge and a swimming pool.

You might use a thermometer to measure the temperature of:

  • a room
  • a fridge
  • your body
  • a swimming pool
  • a city
3 thermometers

You might use different thermometers to measure the temperature of different things.

A lounge with a sofa, a table and 2 arm chairs.

This information is about using a thermometer to measure the temperature of a room.

How do I use a room thermometer?

A thermometer with a question mark and arrows pointing to different parts of a room.

Different parts of a room can be different temperatures.

A man sitting on a chair with a thermometer on the wall behind him.

It is a good idea to put the thermometer on a wall or a shelf so it is at about the same level as you when you sit down.

A cross beside a thermometer which is near a fire and a hot radiator.

Do not put the thermometer:

  • near a fire 
  • near a radiator 
  • in the sun
A lady sitting in a chair with her arms folded.

Leave the thermometer for a few minutes so it can work out the temperature of the room.

A thermometer with a red line to show the temperature and a green arrow pointing up and down.

Some thermometers have a line which moves up and down to show you the temperature.  

A thermometer with a dotted line across the top of the line to the number 18.

If you have a thermometer which has a line which moves up and down, you will need to see which number the line is next to.

A thermometer with the number 18 in the middle of it.

Some thermometers show you the temperature as a number in the middle of the thermometer.

What temperature should my room be?

An information sign.

This information is about temperatures in degrees Celsius.  You write degrees Celsius as °C.

A man with a coat on rubbing his hands next to a thermometer showing 12 degrees.

If your room temperature is 12°C or below, your room is cold.

A man sitting on a chair feeling cold with a blue arrow pointing towards an ambulance and a hospital.

If you spend a lot of time sitting in a room which is cold, you are more likely to have a heart attack, a stroke or hypothermia.  Hypothermia is when you become very unwell because your body temperature is very low.

A lady in a jumper with her arms crossed next to a thermometer which shows 14 degrees.

If your room temperature is 13 - 15°C, your room is cool. 

A man blowing his nose.

If you spend a lot of time sitting in a room which is cool, you are more likely to get illnesses which affect how you breathe.  For example colds or flu.

A girl using an inhaler.

If you have asthma and sit in a cool room, your asthma symptoms might start. 

A lady closing a window.

If your room is cold or cool, make sure the windows are shut.

A draught excluder with arrows going to a window where cold air is coming in.

If the windows are shut and you can feel cold air coming in, you might want to use a draught excluder.

A thermostat with an arrow pointing towards the plus sign and a radiator with heat coming off it.

If your room is cold or cool, turn your heating up.

A thermometer showing 19 degrees with arrows between 18 and 21 degrees and a lady looking happy.

18 - 21°C is a good temperature for most people.

A bedroom and a thermometer showing 18 degrees.

18°C  is a good temperature for your bedroom.

A lounge and a thermometer showing 21 degrees.

21°C is a good temperature for the room where you spend most of your day.

A thermometer showing 25 degrees and an arrow pointing up from 24 degrees with a lady looking too hot.

If your room temperature is 24°C or more, your room is too hot. 

A hand turning down the temperature on a thermostat.

If your room is too hot, turn your heating down.

A gas flame and an electric socket with an arrow pointing downwards.

This will help you to use less energy on your heating.

British Gas Energy Trust logo.

Thank you to British Gas Energy Trust for funding.