12 Best Guitar Humidifiers in 2017

Whether you’re a casual guitar player or someone who just “owns” one, you will probably find it sitting on a stand or cased in a closet. While the latter will protect it from dust or any potential mishaps, it cannot stand up to bad humidity that can wreck your guitar in a short period.

If you have the best guitar humidifier for you needs, you will never have to worry about a cracked or sunken guitar. That said, picking a proper one for your instrument can be tricky considering there are three different styles and most models look and perform the same. Our guide and table will help ease your buying burden and ensure your guitar stays protected from humidity.

Top 12 Guitar Humidifiers Comparison Chart

DesignNameHumidifier TypeWater or RefillsRating (1-5)
  1. Boveda 2-Way Humidity Control for Guitars Hole/Case Refill 4.8
  2. Oasis OH-5 Plus+ Humidifier Hole Water 4.6
  3. Music Nomad MN300 Humitar Acoustic Guitar Humidifier Hole Water 4.6
  4. Oasis OH-1 Guitar Humidifier Hole Water 4.5
  5. URPOWER Humidifier Room Water 4.4
6. Oasis OH-6 Case Humidifier Case Refills 4.3
7. Ultrasonic Cool Mist Humidifier Room Water 4.2
8. D’Addario Acoustic Guitar Humidifier Hole Water 4.2
  9. Kyser Humidifier for Acoustic Guitars Hole Water 4.1
  10. D’Addario Two-Way Humidification System Hole Refills 4.1
  11. Moozikpro Acoustic Guitar Humidifier Hole Water 4.1
  12. Arion In-Case Humidifier Case Water 3.9

Guitar Humidifier Buying Tips

Nothing is worse than picking up your guitar after a long layoff only to find it cracked. That won’t happen with a proper humidifier, and our guide below will help you choose the right one.

Do You Need a Humidifier?

The magic number for “perfect” humidity for the room your guitar is housed in is around 40 to 50%. You won’t know what unless you have a high-end HVAC unit or pick up a hygrometer. If you think a humidifier for that guitar you rarely play won’t matter, think again as a humidity of 25% or lower can cause separation while just dipping below 40% can sharpen those frets.

We’ll save you the trouble, just buy a guitar humidifier as they are budget-friendly and will protect your investment for decades. Even if the room you store your guitar is in the “right range,” it is better to be safe than sorry. Power outages or inclement weather can quickly swing things the other direction, and many guitar humidifiers just require H20 to work.

Types of Guitar Humidifiers

There was a time when silica bags or other methods were used to keep new guitars fresh and humidity down. You have probably thrown your fair share of them away, but none of the picks on our best guitar humidifier list use those. Instead, you will be dealing with water, sponges, and gel for the most part across three different styles.

  • Hole Humidifiers – These use either sponges or salt-based solutions of sorts to ensure your guitar stays in the proper range and never dries out. They sit in the hole and are also deployed in cases for full protection, but not ideal for folks that don’t want to cram things between their strings.
  • Machines – Do you have a room full of guitars or several stringed instruments hanging on the wall? If so, get a humidifier that can handle an entire room. They are the only way to go if you have an actual music room and will keep your instruments in optimum condition at all times.
  • Case Humidifiers – As the name implies, these will sit in your case alongside your guitar. These can come in several forms and use the same elements as well but aren’t quite as common as hold-based humidifiers.


If you decide to use a guitar humidifier that sits in a room, you will not have to worry about traditional refills as you simply need to fill the tank and check the water levels. The same can be said for humidifiers that use sponges or tubes that can be quickly filled. That is not always the case however as some of the better options out there require refills.

We won’t delve into what chemicals or substances are used in kits that need refills, but they usually consist of a pouch you’ll insert or a syringe-based setup. Either way, you decide to go, you will want to keep in mind the cost of refills over time. With water sponges, you may want to make sure the manufacturer doesn’t recommend a particular type of water as tap is always the easiest to deal with.

Top 5 Best Guitar Humidifier Reviews

1. Boveda 2-Way Humidity Control for Guitars

The Boveda 2-Way Humidity Control system is our top choice for a multitude of reasons. While most of our picks remove moisture to ensure peak condition for your guitar, this one can actually add it in as well to keep you in the perfect 44 – 55% range.

Another advantage of this particular kit is the fact you can buy in bulk as each box of refills comes with 12 packs. These packages consist of a mixture water and salt which sits in a special pouch that allows for reverse osmosis through its membrane. The standard packs are set at a 49% RH level, but there are multiple options available ranging from 58% all the way up to 84% which covers everyone regardless of your locale.

While we have heard of some folks using these in other pouches, we highly recommend you opt for the Boveda Holder which is a leak-resistant saddlebag. It can wrap around your strings and sit in the hole or your guitar or be put in the case, so it’s a real all-in-one solution.

2. Oasis OH-5 Plus+ Humidifier

Do you reside out the desert or live an area with extreme temperatures? If so, you will want to consider the Oasis OH-5 Plus+ Humidifier seriously. It’s the upgraded specialized version of the company’s famous blue model but geared towards climates that require a little something extra.

The Oasis guitar humidifier lineup is one that you’ll need to refill, and in this case, you will use water to top them off. They do contain a salt mixture inside, however, so if you have too many spills or it gets low, you will need to purchase special refills for the salt mixture. It does come with a syringe to make things simple, and there’s no reason to fear about water leaking out thanks to two levels of protection against leaks.

While this one may look a little large, it’s made to shrink as it needs to be refilled which lets it easily slip out and tells you when it’s time to refresh. The OH-5 Plus+ is recommended for people that store their instruments in rooms below 25% although there are other models available if your requirements aren’t quite as extreme.

3. Music Nomad MN300 Humitar Humidifier

The Nomad MN300 is the most common style of guitar humidifier as it is a cartridge-based setup that runs off of a sponge. That means the only thing you will need is a little H20 to keep the sponge damp as the plastic container will keep the inside or your guitar in peak condition.

The sponge used by Nomad is dubbed a Humid-i-Bar sponge and is said to hold up to 10x its weight in water. The container that holds it is made from an anti-drip material which promises on leaks or messes with installation or refilling. Need to check the sponge? That will be simple due to the flip top which allows you to take a quick peek inside.

This guitar humidifier sits between the strings of your guitar, something that is not going to be ideal for everyone although it is lightweight and safe. You will also need to use distilled water if you want this one to work properly according to the manufacturer’s recommended directions.

4. Oasis OH-1 Guitar Humidifier

The Oasis OH-1 Guitar Humidifier is the baby brother to the OH-5 that clocked in at number three on our best guitar humidifier list. That’s not due to any differences in the build quality or the way it works; it’s just because this one is geared towards guitarists that need “average” humidity protection and not anything extreme.

You will find the same type of salt crystal solution in this version of Oasis’s humidifier, and it will still shrink down between the strings as it runs dry. The two levels of spill and drip-proof protection are present as well along with the specialized body that slowly seeps moisture to ensure a perfect climate for your guitar.

While this guitar humidifier won’t hold up in harsher climates, you will not have to refill it nearly as often. When gelled, it can last between a week to two weeks before you need to top it off depending on your conditions and how you store your guitar.

5. URPOWER Large Capacity Cool Mist Humidifier

Are you a guitar aficionado with a collection that would make Jack Black swoon? Whether you have a room full of guitars on the wall or just a couple hanging in your studio, you need to keep them protected. You can go the traditional route but may wear yourself out refilling sponges or tubes whereas the URPOWER Large Capacity Cool Mist Humidifier makes things simple.

This is a high-tech unit that can handle a medium-sized room with a max mist volume of 350ml/h and holds up to 5 liters of water. You can set the humidity level on the machine and walk away for the day as it will go for around 17 hours on a full tank depending on your usage and settings. It is also one of the quieter machines to make the cut, so it won’t bother you if you want to leave it constantly running or play in the same room.

This unit is perfect for keeping a constant watch on your guitars or other stringed instruments but is an actual humidifier with its own benefits. Guitars aren’t the only thing that appreciates the proper humidity; your skin will thank you for it as well. The only negative is cleaning the transducer and water tank although that is something you will need to do on any humidifier of this nature.