You will have a better chance to survive a fire.
If you leave your bedroom door open when you go to sleep and there is a fire, it could spread faster into your room. A closed door will give you more time to act and save yourself from the fire. It will keep the temperature in the room down to 100°F, which is a lot more bearable than 1000°F. In addition, the toxic smoke won’t spread as easily.
It blocks out the noise and will give you a more sound sleep.
If you live in a noisy environment and you are a light sleeper, you probably have a hard time falling asleep. So, this means that closing the door is a great choice, even if you are not used to it. Plus a closed door will also keep out the sounds from roommates who are night owls.
It increases your chances of reacting faster in case of burglars.
A closed or, even better, a locked bedroom door can give you an opportunity to act if you hear someone has broken into your home or is about to. This will also allow you to stay safer while waiting for the police to arrive and save you.
According to Feng Shui, a closed door keeps positive energy inside.
One of the Feng Shui principles about bedrooms is to avoid sleeping with an open door. This is because all of the positive energy in the room can escape. It opens up your room to negative chi. Closing it will prevent this and give you a sense of security and safety. You will also have a calmer and more peaceful mind.