How to Make a Dehumidifier With Rock Salt?

Joseph is an HVAC technician and a hobbyist blogger. He’s been working as an HVAC technician for almost 13 years, and he started blogging just...Read more

Do you live in a humid climate? Do you often find your hair frizzy and your skin oily? If so, a dehumidifier may be the perfect appliance for you. But what if you can’t afford to buy one? In this blog post, we’ll show you how to make a dehumidifier with rock salt. Keep reading to learn more!

What is Rock Salt?

Rock salt is a type of halite, which is a mineral composed of sodium chloride. It’s often used in cooking and as a food preservative. But did you know that rock salt can also be used to absorb moisture? That’s right – when placed in an enclosed space, rock salt will help to remove excess moisture from the air.

How Does It Work?

The dehumidifier works by pulling in humid air and passing it over a bed of rock salt. As the air passes over the salt, the water molecules are attracted to the sodium chloride and bind to it. This process removes moisture from the air, leaving it drier and more comfortable to breathe.

How to Make a Dehumidifier With Rock Salt

What You’ll Need:

  • A container with a lid (we recommend using a plastic storage bin)
  • Rock salt
  • A drill with a 1/4″ bit
  • A funnel
  • A length of tubing (we recommend using PVC or silicone tubing)
  • Tape (optional)


  • Begin by drilling a hole in the center of the lid of your container. The hole should be big enough to fit the tubing snugly.
  • Next, insert the tubing into the hole and secure it in place with tape (if using).
  • Use the funnel to add rock salt to the container, filling it to just below the level of the hole.
  • Replace the lid on the container and place it in the room you wish to dehumidify.
  • Turn on a fan and aim it towards the container. The air will flow through the tubing, over the rock salt, and into the room, helping to remove excess moisture from the air.

And there you have it! A DIY dehumidifier that can help to improve the air quality in your home. Give it a try and see for yourself how well it works!

Advantages of Rock Salt

  • Rock salt is a natural and effective way to dehumidify your home.
  • It is also safe to use around children and pets.
  • Rock salt does not emit any harmful chemicals or fumes.

Disadvantages of Rock Salt

  • If you have small children or pets, you will need to keep them away from the salt because it can be harmful if ingested.
  • Rock salt can also damage floors and carpets.
  • You will need to clean up the salt after each use.

How to Make a Dehumidifier With Rock Salt

Making your own dehumidifier with rock salt is a simple and effective way to remove excess moisture from your home and improve indoor air quality. Give it a try today.

  • Choose a container that is airtight and can hold at least 10 ounces of rock salt. A mason jar or Tupperware container with a lid works well.
  • Place the rock salt in the bottom of the container.
  • Cut a piece of charcoal from a briquette into small pieces and add it to the rock salt.
  • Add a cup of water to the container and stir until the salt is dissolved.
  • Place the lid on the container and allow it to sit for 24 hours.
  • After 24 hours, remove the lid and add a cup of distilled water to the mixture. Stir until the salt is dissolved.
  • Replace the lid and allow the mixture to sit for another 24 hours.
  • After 48 hours, your dehumidifier is ready to use. Place it in the room where you want to remove moisture and allow it to work its magic!

Will a Homemade Dehumidifier Be Effective?

You may be wondering whether a homemade dehumidifier will actually work to remove moisture from the air. The answer is yes, but it will not be as effective as a commercial unit. DIY dehumidifiers work by absorbing moisture from the air and then releasing it into the salt.

As the salt becomes saturated with water, it will no longer be able to absorb any more moisture. This process is not as efficient as a commercial dehumidifier, but it will still help to reduce the amount of moisture in the air.

What You Will Need:

In order to make your own dehumidifier, you will need:

  • A clean, dry container that is large enough to hold the salt
  • Rock salt (also known as solar salt) – this can be found at most hardware stores
  • A drill with a small bit
  • A funnel


  • Drill a small hole in the bottom of the container. This will be used to drain any water that is collected by the salt.
  • Fill the container with rock salt, using the funnel if necessary.
  • Place the container in the room where you want to reduce the moisture.
  • Check on the salt regularly, and empty any water that has been collected in the bottom of the container. Replace the salt as needed.

A homemade dehumidifier is a simple and inexpensive way to help reduce the moisture in the air. It will not be as effective as a commercial unit, but it can still help to make your home more comfortable.

Symptoms of high Humidity

Symptoms of high humidity in your home can include musty odors, dampness on walls or floors, water stains, peeling paint or wallpaper, and warped wood. If you notice any of these signs, it’s time to take action to remove the excess moisture from your home.

Final Thought

So, there you have it! You can make your very own dehumidifier using rock salt and a few common household items. It may not be the most efficient dehumidifier out there, but it’s definitely a fun (and cheap) project to try. Be sure to let us know how it turns out for you!

Joseph is an HVAC technician and a hobbyist blogger. He’s been working as an HVAC technician for almost 13 years, and he started blogging just a couple of years ago. Joseph loves to talk about HVAC devices, their uses, maintenance, installation, fixing, and different problems people face with their HVAC devices. He created Hvacbuster to share his knowledge and decade of experiences with people who don’t have any prior knowledge about these devices.

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