How to boil water without heat?

This brief guide will answer the question, “how to boil water without heat,” and discuss what vacuum pumps are and what role they play in boiling water without heat, and how long does boiled water last.

How to boil water without heat?

If you are looking to boil water, but your microwave is out of commission, and you don’t have a stove or campfire handy, you still have options. It’s possible to boil water without heat using the technology available in most homes. Here’s how:

  • Gather materials: You will need a vacuum pump, water, an ice cube tray, a freezer, a basin, or a tub of cold water.
  • Fill the ice cube tray with water and put it in the freezer for about an hour.
  • Put the cold water basin on a table or other surface that you can reach from above and below.
  • Once the water has been frozen into solid cubes, place the cubes in the basin of cold water.
  • Place the vacuum pump over the cubes and turn it on to pull out all of the air from around the cubes. This will cause them to instantly evaporate as they are drawn through the tube into a vacuum chamber.

How long does boiled water last?

Boiled water will stay potable and drinkable for very long periods, provided it has not been contaminated by other sources and is kept in a clean environment.

Boiled water is simply water that has reached its boiling point (212 degrees Fahrenheit or 100 degrees Celsius). One can achieve the boiling point of water through heat. Boiling water kills bacteria and viruses that are present in the water.

If you are using a vacuum pump to boil the water without heat, it may take longer for the pump to get the water to reach its boiling point. Once at a boil, the water will stay potable for many years, given the right conditions.

Vacuum pumps work by killing microorganisms in the water by heating the water above its boiling point of 100 degrees Celsius (212 degrees Fahrenheit).

Boiling water is simple if you have access to gas or electricity. But it’s not possible in all situations, such as when you’re hiking or camping and running out of fuel for your stove.

You can use a vacuum pump to boil water without any heat. If you pump air out of a water container, the pressure inside it will drop, and the temperature will fall too. This continues until the vapor pressure reaches atmospheric pressure. At this point, evaporation takes over from boiling.

The lower pressure boils the water at room temperature. When you release the vacuum, the vapor condenses back into liquid water in the container. You can repeat this process repeatedly and still have safe drinking water each time.

What are vacuum pumps, and what role do they play in boiling water without heat?

Vacuum pumps

A vacuum pump is a device that uses a mechanical action to create a vacuum, which is an area of space containing few or no gas particles. 

Vacuum pumps are often used to move air or other gasses from one place to another. The first vacuum pump was invented in 1650 by Otto von Guericke and was initially used to generate vacuums for scientific experiments.

In the 19th century, people used them to create vacuums in the manufacturing of light bulbs, and in the 1920s, they were used as parts of industrial processes such as chemical production.

Vacuum pumps have also played a significant role in developing modern medicine and its many devices, such as X-ray tubes, CT scanners, PET scanners, MRI scanners, etc. They are essential for creating vacuums in boilers without using heat.

Role of vacuum pumps in boiling water without heat.

Boiling water without heat may sound impossible, but using a vacuum pump to create a vacuum in the area surrounding the water can be done.

That’s because boiling is a process that occurs when heat causes the molecules of liquid water to gain enough energy to escape from their liquid state and enter the gaseous state. When this happens, we see steam being produced.

By removing air from the area around the water, we remove molecules (such as those in the air) that could otherwise interact with water molecules and give them the energy to boil. As a result, the water molecules cannot reach the power they need to boil because they have no way to be exposed to molecules that could give them that energy.

When this happens, the water can still reach 100 degrees Celsius, the temperature at which it would typically start boiling. Still, without any interaction with other molecules in gas form, it does not boil.

Other FAQs about Water that you may be interested in.

How to counteract too much water?

What happens to the boiling point of water when salt is added?

Can you boil saltwater and drink it?

Can you boil seawater and drink it?


This brief guide addressed “how to boil water without heat” and other inquiries related to the subject, such as vacuum pumps, their role in boiling water without heat, and how long boiled water lasts.