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Oasis HH Combo OH-30 Humidifier / Hygrometer

Soundhole Humidifier with Built-in Hygrometer
$39.95

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Oasis HH Combo OH-30 Humidifier / Hygrometer
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This article was Written By

Our Product Research Team

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Prevent Damage to Your Acoustic Guitar

Protect your acoustic guitar from cracking, warping, or worse with the Oasis HH Combo OH-30. This humidifier is a breeze to use. Just fit it into the soundhole of your steel-string acoustic, and it releases moisture evenly and slowly, while its built-in hygrometer takes all the guesswork out of adjusting humidity levels. The humidifier employs a drip-resistant sponge that holds 10 times its dry weight in water, so you won't need to refill it very often. The hygrometer is accurate, easy to read, and can be calibrated to your preferences. Guitarists at Sweetwater know that safeguarding your instrument with a humidifier/hygrometer like the Oasis HH Combo OH-30 is a must.

Why do I need to worry about my guitar’s humidity level?

Changing weather conditions greatly affect the amount of humidity present. A typical acoustic guitar holds between eight and 10 grams of water. If the guitar's wood dries out, it shrinks. If it gets over-hydrated, it swells. Because your strings place a lot of tension on your guitar, shrinking and swelling can cause anything from fret buzz and fret-overhang to warping or twisting of the neck and top. And if you're really unlucky, your guitar will crack or split. That's why it's important to maintain a constant humidity level with a device like the Oasis HH Combo OH-30.

Here are some tips for protecting your acoustic guitar:

  • Store you guitar in its case when not in use and place a temperature/humidity gauge inside the case.
  • Keep the humidity level between 45%-60% inside the case. A guitar humidifier will usually do the trick, but it may also be helpful to use a room humidifier or dehumidifier.
  • 70 to 74 degrees Fahrenheit is ideal for guitars. Storing them away from direct sunlight or sources of heating and air conditioning will help to maintain a constant temperature.
  • Humidity control is like an extra insurance policy for the health and well-being of your guitar.

Oasis HH Combo OH-30 Humidifier/Hygrometer Features:

  • Soundhole humidifier with convenient user-adjustable hygrometer
  • Fits easily in the soundhole of your steel-string acoustic guitar
  • Humidifier releases moisture evenly and slowly
  • Hygrometer takes all the guesswork out of adjusting humidity levels
  • Drip-resistant polyvinyl acetate sponge holds 10 times its dry weight in water and maintains humidity for 15 days or more before needing to be recharged
  • Features 4 openings for water vapor to escape, with 4 additional openings that can be punched out for more humidity in dry climates
  • Sponge is easily recharged by moistening it with distilled water
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Tech Specs

  • Manufacturer Part Number: OH-30

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Customer Reviews

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Rated 5/5

Oasis combo

Delivery was quick and on time. Product does a great job at keeping my guitar at the right (programmable) humidity while in its case.
Rated 5/5

Cause and effect.

Product works as designed.
Almost destroyed my guild acoustic, winter dehydration. The Luther's at Sweetwater were able to bring it back to playing condition. They recommended some products. I chose this again with another acoustic guitar recently purchased from Sweetwater.
Rated 5/5

simple and easy

i'm new to acoustic guitars, i've been gibson les paul my whole life..... i now have 2 acoustic/electrics, and i want to make sure they stay in good shape. so after all that garb, i really like this unit, it's simple and easy to use, and it works great.... i don't have to worry about the packet getting hard, and costly replacements.... i keep a gallon of distilled water to soak the sponge, and wah lah ! this little unit is doing a great job so if you don't have one, ya better get you one.... get it from SWEETWATER, i did, and i'm happy, happy, happy, and you will be too..............
Music background: GENUIS !!
Rated 5/5

Hydrate your equipment!

This unit takes the guesswork out of keeping your expensive guitar at the correct temp and humidity level. I live in a hot, dry portion of the country and did not want take a chance on damaging my nice acoustic. Check the sponge frequently the first several weeks to get the feel for how often you will need to replenish it (this was the trickiest part). I wish they made a similar unit that would fit an f-hole acoustic/electric.
Music background: Amateur
Rated 5/5

Great fulfillment on this small order

I'm no expert on humidfiers so I can only comment that the order arrived early, with the usual lagniappe of candy and a nice note from Greg Baum.
It seems to be working fine.
I'll be shopping with Sweetwater again.
As a side note, if you're in the area, their big place near Fort Wayne is a delight. Everyone's friendly and helpful and there's a ton of gear to drool over.
Music background: sometime working pro player
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