Keep Your Grow Room at the Perfect RH

Keep humidity stable for stronger plants, healthier buds, and better yields.

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Keep Your Basement Dry and Quiet

Argendon Grow Room Dehumidifier:
Bigger, Healthier Harvests

Do I Need a Dehumidifier in My Grow Room?

Absolutely—if you want healthy plants and mold-free buds. Plants transpire heavily, especially during late veg and flowering. This moisture builds up quickly, pushing RH to 60–80% or higher. High humidity can cause powdery mildew, bud rot (Botrytis), slowed growth, and poor air quality.

Argendon commercial grade dehumidifiers help you maintain the ideal 45–55% RH in veg and 40–50% during flower, giving your plants the climate they need to thrive.

How to Calculate Dehumidifier Size for Grow Rooms

The right size depends on your room dimensions and how much water your plants transpire each day.

As a general rule:

  • 4×4 or 5×5 grow room → 60–70 pints/day
  • 10×10 grow room → 110-120 pints/day
  • Large grow rooms → 150+ pints/day

Plants release a surprising amount of water. If your grow room dehumidifier can’t remove more moisture than your plants transpire, humidity will stay high no matter how hard you run your fans. That’s why oversizing slightly is better than undersizing.

Best Place for a Dehumidifier in a Grow Room

The best place to install a dehumidifier in a grow room is directly above the areas with the highest plant transpiration—typically the plant canopies and irrigation zones. These spots generate the greatest moisture load as plants release water vapor throughout both the light and dark cycles.

For maximum efficiency, the dehumidifier should be suspended above or placed near the grow lights. This upper section of the room is where heat and moisture naturally rise and accumulate, allowing the unit to capture humid air before it spreads throughout the space.

Also be sure to avoid positioning the dehumidifier in corners or against walls, where airflow can be restricted. Proper air circulation is essential for optimal performance.

5 Reasons You’ll Love Argendon Grow Room Dehumidifiers

5 Reasons You’ll Love Argendon Grow Room Dehumidifiers

Compressor-type dehumidifier — Built with durable coils & fast humidity control.

High airflow design — Efficiently circulates air throughout the entire grow room.

Built-in drainage pump — No need for manual emptying; enjoy continuous, hassle-free 24/7 drainage.

Smart humidity control — Maintain your ideal RH level, turning on and off automatically.

Air filtration — Remove dust and airborne particles, helping limit mold spore spread.

How to Use Argendon Dehumidifier in Grow Room？

1. Power On/Off

1. Power On/Off

Press the Power Key to turn the unit on or off. When powered on, the display will show a startup screen, and the unit will beep to confirm the operation.

2. Select a Dehumidification Mode

2. Select a Dehumidification Mode

Press the Mode Key to switch between the two available modes:
1. Continuous Dehumidification Mode
2. GPP Mode

3. Set the Humidity Level

3. Set the Humidity Level

Use the Set Key to adjust the desired humidity level.
You can also use the Set Key to activate or deactivate the GPP Mode.

4. Water Pump Option & Dehumidify

4. Water Pump Option & Dehumidify

Hold the Water Pump Key for 3 seconds to turn the pump function on or off. After setting your preferences, the Argendon dehumidifier will automatically turn on and off to maintain your set humidity range, usually within +3-5%.
Tips：When the pump is active, pressing the DRAIN Key will start a 28-second force drainage cycle.

What Are The Benefits of a Grow Room Dehumidifier?

Optimal Humidity Control

Optimal Humidity Control

Powerful compressor, 5-year warranty, with the dehumidification capacity of 70–145 pints/day. Argendon dehumidifiers in grow room can keep ideal humidity level, preventing mold, mildew on your plants.

Prevent Pests and Fungi

Prevent Pests and Fungi

High humidity creates a breeding ground for pests and fungi. Argendon dehumidifier with a MERV 8 filter helps to trap mold spores in the air, while also making the grow room dry and less hospitable to fungus gnats and other harmful pests that thrive in damp conditions.

Improve Airflow

Improve Airflow

With 185 CFM airflow, the grow room dehumidifiers enhance air circulation when removing excess moisture. Good airflow ensures even humidity and CO2 distribution. Even humidity levels help plants absorb water more efficiently and prevent mold. Proper airflow also spreads CO2 evenly, supporting photosynthesis to produce energy.

Energy-Efficient Climate Control

Energy-Efficient Climate Control

By maintaining the optimal humidity level automatically, Argendon dehumidifier for grow room has a GPP dehumidification mode. The unit will cycle on and off as needed, optimizing energy usage and lowering your electricity bills.

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User Reviews

Ashley

Great Product!

This is an amazing dehumidifier. I have an old house so during rainy days and humid summer days my basement gets super moist. This dehumidifier easily takes care of my basement and essentially makes it bone dry. The size is great for the quality of the build and super easy to plug in and use. I would buy this asap if you need a dehumidifier that will get rid of a bunch of moisture
Built-in Pump: The included pump works flawlessly, allowing for hassle-free drainage without constant monitoring. straightforward, and it’s ready to go right out of the box. This dehumidifier has exceeded my expectations and is worth every penny. It has brought peace of mind, knowing my space is protected from excess humidity. Highly recommend it for anyone needing a reliable and efficient dehumidification solution!

Mike M

Efficient, and Great Priced Dehumidifier

I have purchased many of these dehumidifiers and will continue to do so. Here my opinion of these products.I have recently purchased ANOTHER ARGENDON Commercial Dehumidifier, and I couldn't be more impressed with its performance AND the Price! This 145-pint powerhouse works wonders in a Crawlspace or basement, eliminating excess moisture effortlessly. The included drain hose makes continuous operation a breeze, and I love not having to worry about emptying a tank.The build quality is outstanding, and it's clear this dehumidifier is built for industrial-level performance. It's quiet for its size and efficiency, and the Energy Star certification gives me confidence that I'm saving energy while keeping my home and workspace dry.What sets this unit apart is its cETL certification, which reassures me of its safety and reliability. Whether you're tackling a damp crawlspace, basement, or even an industrial site, this dehumidifier is up to the task. I highly recommend the ARGENDON Commercial Dehumidifier to anyone needing a durable, efficient, and easy-to-use solution for excess humidity!The great prices on these products keep me coming back for more!

Kunal

Well built unit at this price point with inbuilt water pump

I just unboxed it and did a test run in my basement lounge. So far, the unit seems effective. I originally bought it for my crawl space. It’s well built, and the functions and features are as expected. The best feature for me is the built-in water pump, which makes it ideal for pumping water collected by the unit outside the crawl space. There aren’t many reviews, but to my surprise, the unit does not disappoint. I hope it lasts a long time. I would like the manufacturer to extend the warranty to include return shipping for at least one year. Update : water pump shut down if you turn and turn back on unit. Make sure after power cut you manually validate the pump is one. I wish it has memory like other setting . Which machine retain. Next I have to test it in crawl space

Andrew

Quiet and powerful

Our basement has always been a bit damp, especially during the rainy summer months when the humidity gets really high. I chose this dehumidifier mainly because it has a built-in pump that automatically drains the water, no need to empty a tank every day. After setting it up and connecting the drain hose, I pretty much haven’t had to touch it. The machine runs steadily and reliably. After using it for a while, I noticed a big difference. The basement feels much drier, and the corners that used to get moldy are much better now. It’s also surprisingly quiet and doesn’t disturb upstairs. I like that it has an auto defrost function too, so I don’t have to worry about it freezing in winter. Overall, it’s a very low-maintenance, high-performance unit, perfect for someone like me who wants results without the hassle.

RNFinCA

Works, but improvements would help.

So far, it is working as advertised. It is fairly quiet and it removes moisture out at a reasonable rate. However, there are a few things that would significantly improve the product. (I may have confused this model with some others this vendor offers. This one was on the pedestal as their best, so I selected it. )
1) This one does not have a pump for water outflow. With the connection about 1" off the ground, that means it either has to have a floor drain near by, or it has to sit on a platform. It is advertised for crawl spaces. Don't know how it would work if the crawl space lacked a floor drain.
2) The connection is for a plastic tube. A standard hose connection would be so much better and easier to use. Maybe because it requires a near by floor drain?
3) All of the other units I have had, show the current setting and humidity levels at a minimum. This one I have to push a button for the display to turn on. I get the small energy savings that might yield, but at a minimum, it should be an option.
4) The user interface should be redesigned.

Outdoor King

Giant upgrade!

Such a giant upgrade from my old mini one! Turned basement into a small home gym and had pretty damp air and with my old mini dehumidifier, it was a pain to dump the water every day and once you forget to do so, you will have to work out in humid air. I decided to take a huge step to upgrade and leave everything hands free and worry free. With this new big machine, everything is just amazing! It is huge! Especially when you compare it with the old one! Build quality is phenomenal and metal always gives you more confidence. Running noise is more than acceptable. I have a 1300 sqft basement and it’s very efficient to keep it dry! Draining is automatic now and I do not have to dump the water every day! Now once I step into the basement, the air feels so good and to my surprise, after several days, the spider webs and insects are getting less, which I never thought about.

ZeeSports International

Great Product, with LED Humidity Levels that show Accuracy

1. Delivery and Packaging: The product came in very good condition. Packing was sturdy, and delivery was on time. No dents or damages. 👍
2. Design and Build Quality: It has a modern and sleek look. The plastic quality is also very durable. Easy to move around because of wheels.
3. Easy Installation: Plug-and-play type. No rocket science required. Just fix the hose if you want continuous drainage, and it’s ready.
4. Performance: Works like magic! Humidity in the room dropped within an hour. Makes the air feel fresh and comfortable. Perfect for monsoon weather.
5. Noise Level: Very quiet. Not disturbing during sleep. You can hardly notice it’s running.
6. Water Tank Capacity: Decent size tank that doesn’t need frequent emptying. The full-tank indicator is very helpful.
7. Energy Efficiency: Doesn’t consume too much electricity. My bill didn’t increase significantly even after using it daily.
8. Digital Display: The LED display is clear and shows humidity levels accurately. Controls are user-friendly.
9. Value for Money: Slightly on the expensive side, but the performance justifies the cost. Better than many local brands.
10. Customer Support: Argendon’s customer service is very helpful and responsive. They answered my queries about maintenance very patiently.
Overall: Highly recommended for families looking to control humidity and improve indoor air quality. Worth the investment! 👌

Deacon John

Great tech support

I had to return first one for it didn’t run however Amazon immediately sent me a new one. The second one brought humidity down some, but not enough. So I called Tech Support and woman told me the crawlspace needed to be encapsulated so I got from Amazon 1 1/2” & 2” polyurethane Pieces that were firm but pliable and cut just larger than vents and stuffed into holes. My ground plastic was missing in some places so I added that. The tech also said to get a second humidity gauge which I already had in the crawlspace and said it should read around 10% less than unit. Mine varies 10° to 11°less and she said set it near my dehumidifier and said set my dehumidifier around 55%. I set mine at 56%. It took a few weeks, but humidity went from 92% to 44% on my separate gauge & 56° on my dehumidifier. So great Tech support and fast replacement. It’s sitting in the very center of crawlspace doing a great job.

Stefanie Leibowitz

Satisfied

Crawl space was very humid causing mold to form. I was looking for something heavy duty so I ended up buying this. So far, it has been working non-stop for a week and doing a great job. Crawlspace went from high 80s to now the set point of 45F. It’s extremely quiet and don’t even know it’s on unless very close to it. Easy to install and set up. So far, I am pleased.

D. Ford

Excellent Dehumidifier for Crawlspace

The ARGENDON dehumidifier works exactly as promised. It quickly reduced moisture in my crawlspace and keeps the air much fresher. Very quiet and efficient, with no issues so far. Easy to recommend if you need something reliable for tough spaces like basements or crawl areas.

Kevin M.

Excellent dehumidifier! Easy Set up!

Purchased this dehumidifier for our finished basement and was amazed at how quickly it removed moisture! Quiet and easy to move. Set up is incredibly easy. Comes with 2 drain hoses for 2 different drain options- gravity drainage connecting to a floor drain or built in pump allowing water to be directed up to 19.6 ft. It has four buttons for easy operation. Humidity setting, continuous mode, GPP mode and auto on/off. Covers 1500 sq ft. Great value for a commercial dehumidifier, I would definitely buy this unit again!

Amazon Customer

Amazon replaced mine.

Amended review. Customer service called me the next day, Amazon replaced the defective unit. New unit works well. Impressed that the manufacture saw I tried to call and then called me back the next day.Original review- The unit leaks from the bottom. Installed perfectly level as instructed. Tried calling customer support and never got to talk to someone. Crawl space is a big mess.

Jason

Very satisfied

Nice and quiet. Works well in my room where we grow microgreens. Just wish it had a setting between 50% and 70% humidity

Jon

Powerful! Finally a dehumidifier that actually does what it says

Powerful! Best dehumidifier I ever had, by a mile. Within a couple days, my 650 sq ft basement reached my goal of 50-55% humidity. Before this dehumidifier, it was 75%. I tried other residential dehumidifiers, which totally didn’t work. This one is great. Well worth the money if you have serious humidity issues in a large open space.Seller (Argendon) had excellent customer service. I contacted them when the Merv filter for the dehumidifier arrived dented. They resolved the issue quickly. CONS:It’s doesn’t tell you the humidity level in the air. I bought a hygrometer for less than $10. Honestly, you can feel the difference in the air but I like to keep track. Not eligible for the ENERGY STAR REBATE = My electric company denied my rebate, saying this model (Shield 35M) isn’t listed on the Energy Star government website “Product Finder”. Sadly, I confirmed that is true. Not sure why it says energy-star certified in the ad.P If applying for an energy star rebate is important to you, consider the Argendon 35P model instead.

Annette Peterson

Worth the money

Dried my wet musty basement & keeps it dry

Shadowclown

Probably overkill for me, but it works

I'm not an expert, and I'm not using this professionally, so I'm probably an outlier here.As regular a homeowner that just got tired of expensive garbage plastic dehumidifiers from the big box store, this is a durable heavy duty replacement.Just taking this out of the box you can tell it is more of a heavy duty unit than the competitors. I'm guessing it's intended more for contractors? But, it works great for us. After years of fighting with gravity drains that decide to fill the bucket instead of the hose, filter clogged messages & flaky units that just don't turn on when the humidity gets high, this just works.It isn't as sleek & pretty looking as the plastic ones. I just want something that works, and this does. It's only been a little while, but my wife pointed out the musty smell is already gone in our basement. I'll update or change this if I have any problems. For now, I'm loving it! Spend a little more money now, you'll be happier in the end.The control is not intuitive, but reading the instructions made it easy to understand & use. Noise is less than the units it replaced. I'm tracking energy usage, with a smart plug, and it's lower than the energy star model it replaced.

Mark

Great unit, pulls lot of water out of air but not sure auto turn-off is working properly

Seems like a great unit, but doesn't seem to shut off when set on 50% even though I am sure humidity levels are lower than that.

J. Brooks

Great-so far.

I’m giving this unit four stars right now because it’s too early to give it five. It does a great job drying out my damp basement, but I’ve had plenty of dehumidifiers that have done that. I’m hoping that this one will actually last more than a year or two.

ETL Safety Certified

ETL Safety Certified

Certified by rigorous ETL safety standards. Totally safe and tested, no worries.

Energy Star Certified

Energy Star Certified

Awarded the Energy Star certification for high efficiency and energy savings.

5-Year Warranty

5-Year Warranty

Enjoy worry-free use with our 5-year limited warranty.

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Fast, Free Shipping

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24/7 Customer Support

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Blog Posts

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7 Best Crawl Space Dehumidifiers of 2025
7 Best Crawl Space Dehumidifiers of 2025
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If you are in the market for a crawl space dehumidifier, then you are in the right place. Excess moisture in a crawl space can lead to mold, wood rot, poor i...