In a grow tent, the air can become humid and stagnant. This is not good for your plants because it can lead to a wide range of fungal diseases and it will promote the growth of mold and mildew. To combat this problem, it’s a good idea to invest in a quality dehumidifier. On this page, you’ll find the best dehumidifier for a 4×4 grow tent along with some helpful tips on how to lower the humidity in a grow tent.
Best Dehumidifier for a 4×4 Grow Tent
Best Dehumidifier for 4×4 Grow Tent
Gocheer Dehumidifier for Home, Upgraded 4000ml(128oz) Dehumidifier
The Gocheer Dehumidifier (Buy Online) is a great way to keep the air in your 4×4 grow tent nice and dry. It sucks up moisture from the air using semiconductor condensation technology, and it’s good for both grow tents, as well as other confined spaces like closets or small, grow rooms.
The Gocheer dehumidifier is one of the best on the market because it absorbs up to 1 liter of moisture per day from a 510 sq ft area. Plus, this dehumidifier runs quietly with a noise level of less than 40 dB so you won’t disturb anyone while using it.
If you’re looking for a top-quality dehumidifier that will work in very humid tropical environments then the Gocheer Dehumidifier is our top pick. However, if you live in a dryer region then one of the less powerful dehumidifiers below might be a better choice.
MADETEC Upgraded 64oz Dehumidifier
The MADETEC Dehumidifier (Buy Online) is one of the best dehumidifiers for a 4×4 grow tent that regularly reaches humidity levels over 95%. It improves air quality by keeping your grow tent in the ideal 45%-55% humidity range so that your plants won’t suffer from excessive dryness or dampness caused by high levels of humidity.
The MADETEC Dehumidifier comes with a 64 oz water tank that collects moisture from the air and then releases it outside via an included hose attachment. It’s also designed specifically for use in grow rooms so it doesn’t emit lots of heat like standard compressor-powered humidifiers.
This compact mini dehumidifier weighs just a little over 5 pounds and can be placed on any surface. You’ll also love how quiet this unit runs because it outputs less than 50 decibels of noise while operating — about as loud as a normal conversation. And it has a built-in 24-hour timer function which allows you to save electricity and run the dehumidifier only when your plants need it.
COSVII Upgrade Dehumidifier with 68oz Water Tank
The COSVII Dehumidifier (Buy Online) will ensure that your 4×4 grow tent has just the right amount of moisture for your plant’s health and growth. It’s capable of extracting up to 34 ounces of water from the air each day into its large water tank. Plus, this dehumidifier makes almost no noise at all – perfect for quiet bedrooms or living spaces where you don’t want to disturb anyone else with loud machinery noise. And because this machine only uses 48 watts per hour it won’t cost much money to run either.
Pro Breeze Electric Mini Dehumidifier, 2200 Cubic Feet (250 sq ft),
The Pro Breeze Electric Mini Dehumidifier (Buy Online) can help keep the air in your grow room fresh by removing up to 18 ounces of water per day and it has a 52-ounce water tank capacity. This dehumidifier covers an area from 250 square feet up to 3000 cubic feet (250 sq ft).
The Pro Breeze is an electric mini dehumidifier that offers all the benefits of a standard-sized unit without taking up too much space or costing too much money to run. The compact design of this unit will fit in any grow room or office setting with ease. And you’ll never have to worry about it being too loud because the Peltier technology makes it whisper-quiet even when operating at full capacity.
It’s also more efficient than other models so you won’t spend as much time emptying water buckets either. This means less work for you on a daily basis while still keeping your plants happy and healthy.
Afloia Cordless Rechargeable Dehumidifier
The Afloia Dehumidifier (Buy Online) uses silica gel beads that absorb moisture out of the air around them. You place this device inside a grow tent, where it absorbs all the excess humidity until its crystals turn green (this takes about 2 days). Once they’ve turned green, you remove the dehumidifier unit from the tent and let it recharge for a few hours so that all of its water-absorbing beads are dry again.
Then you can put it back into your grow room for another two-day cycle. It’s an easy way to keep your indoor garden at just the right level of humidity without having to worry about any extra maintenance work on your part.
You could buy a big dehumidifier that will work for years, but they are expensive and very noisy. Afloia is small, portable, and inexpensive. It’s the perfect solution for indoor gardening enthusiasts who want to keep their plants healthy without breaking the bank or taking up lots of space.
Afloia mini dehumidifiers can remove up to 4 ounces/100ml of water per day. They’re suitable for areas up to 55 square feet (5m2).
Nessbase Dehumidifier 77.5oz (2300ml)
The Nessbase Mini-Dehumidifier (Buy Online) provides powerful performance in a compact design that will easily fit within a 4×4 grow tent. It uses Peltier technology to efficiently remove moisture from the air while only taking up 0.375 square feet of floor space. This humidifier also has five different timer settings so you can set it and forget it without worrying about monitoring it all day.
SEAVON Dehumidifier 35oz Dehumidifier
The SEAVON Dehumidifier (Buy Online) is designed to control humidity without increasing the temperature of a room or drying it out. It’s perfect for use in grow tents, closets, basements, mini-greenhouses, and more. This compact unit easily fits on any desk or bookshelf and has an auto-off feature that turns off when the water tank is full.
This small unit has a cylindrical design and compact form factor(6.3×6.3×10 inches). Plus, it features two modes – high speed and low speed that will meet all kinds of dehumidification requirements.
ALORAIR Commercial Dehumidifier 113 Pint, with drain Hose
The ALORAIR Commercial Dehumidifier (Buy Online) is designed with a high-performance dehumidification system and advanced digital controls so you can easily maintain humidity levels between 30% and 60%. This commercial-grade dehumidifier will remove up to 113 pints per day (53 PPD AHAM) from an area measuring 1,200 sq ft. It also features a continuous drainage option so you won’t have any problems emptying out collected water when necessary.
Best Moisture Absorbers for a 4×4 Grow Tent
Good Worth Mini Electric Cordless Dehumidifier
The Good Worth Mini Dehumidifier (Buy Online) is suitable for small enclosed spaces like closets or grow tents. It works by drawing in air through silica beads which remove moisture from the air before releasing it back into the room. Then once it’s fully saturated you can place it on the included base and the built-in fan will “recharge” the silica crystals in as little as 2 hours.
Vacplus Moisture Absorber, 10 Pack Portable Dehumidifiers for Closet and Enclosed Space, 14 OZ Dehumidifier Bags
The Vacplus Moisture Absorber (Buy Online) uses special calcium chloride beads to draw out moisture from the air around them, making them extremely effective at removing humidity from inside grow tents or other enclosed spaces where they’re used most often by indoor gardeners.
DampRid Fragrance Free Refillable Moisture Absorber – 10.5oz cups – 4 pack
DampRid (Buy Online) is an affordable way to remove musty smells from any area where excess humidity collects. And each refill lasts up to 60 days depending on temperature and humidity levels. We recommend placing DampRid near the carbon filter on your ventilation system or near an oscillating fan in your grow tent for maximum effectiveness.
Vacplus Moisture Absorber with Activated Charcoal, 6-PACK Closet
The Vacplus Moisture Absorber with Activated Charcoal (Buy Online) absorbs excess moisture from the air in your grow tent, leaving you with fresh air as well as eliminating any musty odors that may have developed over time without adding any other masking scents to your grow tent.
Dry & Dry [8 Pack] [Net 10.1 Oz/Pack] Premium Moisture Absorbers
Dry & Dry Premium Moisture Absorbers (Buy Online) are specifically designed for use in grow tents or any enclosed space where excess moisture may be present. These handy little moisture absorbers will last up to 60 days (depending on temperature and humidity).
4×4 Grow Tent Temp and Humidity Controller
Inkbird ITC-308 Temperature Controller with IHC-200 Humidity Controller
This Inkbird Controller Set (Buy Online) has two main parts – the humidity controller and the temperature controller. They each have separate controls that can be set independently from one another (though they do work together).
The ITC-308 & IHC-200 controllers will help you control the climate in any indoor environment like a greenhouse, garden shed, or grow tent. And each controller unit will monitor your grow tent and turn on and off fans, grow tent heaters, chillers, and dehumidifiers based on the temperature and humidity values that you set.
MARS HYDRO 6″ Inline Duct Fan 350CFM 6 Inch Ventilation Exhaust Fan with Temperature Humidity Controller
The MARS HYDRO 6″ Inline Duct Fan with Temperature and Humidity Controller (Buy Online) is perfect for any hydroponic application including greenhouses, indoor gardens, and grow tents.
This inline duct fan comes complete with everything you need for an easy installation. The controller features a built-in thermostat for precise temperature control; it also includes an adjustable timer and alarm function to notify you when the desired temperature has been reached or exceeded.
The controller’s digital display shows both setpoint and current temperatures as well as relative humidity readings from 5% – 95%. Plus, it has a handy wired remote control unit that allows you to operate all of these functions from outside of your grow tent.
AC Infinity Controller 67, Smart Fan Controller with Temperature, Humidity, and Timer Controls
The AC Infinity Controller (Buy Online) will allow you to adjust your fan’s speed based on temperature or humidity, so it won’t run as often when there isn’t much heat or moisture in the air. You’ll also be able to set up different schedules for different times of the year, which is perfect if you’re using this system during the summer months.
One of our favorite features is that this controller has an LCD display that lets you monitor all of its settings at a glance without having to dig into your computer or mobile device every time you want to check something out. It also comes with two thermalloy sensors so it can measure both ambient temperature and humidity levels at the same time.
4×4 Grow Tent Humidity Sensor
tempi.fi Mini Wireless Temperature and Humidity Sensor
The tempi.fi Mini Wireless Temperature and Humidity Sensor (Buy Online) is an easy-to-use smart sensor that measures temperature and humidity in your grow tent automatically, wirelessly sending readings directly to your smartphone or tablet via Bluetooth LE. It connects to any iOS or Android mobile device with Bluetooth 4.0 support – no Wi-Fi required.
The tempi.fi Mini Wireless Temperature and Humidity Sensor is a perfect solution for any indoor garden because it takes readings every minute, so you will always have up-to-date information about the current growing conditions in your 4×4 grow tent.
You’ll also get detailed graphs of historical data as well as notifications when things start going out of range (like too much humidity). The app even allows you to export everything as CSV files which means you can use this info however you like – open it with Excel or even upload it to Google Sheets.
How To Lower Humidity in a Grow Tent
In this section, we will go over a few ways to lower the humidity levels in your grow tent. We’ll be discussing a few inexpensive ways to do so as well as some more costly options.
The first method we’ll discuss is using a dehumidifier, which can help reduce excess moisture in your grow room by pulling it over a cool coil which causes the moisture in the air to condense. This device typically needs to be emptied every day or two, depending on how much water has been collected in its container.
Other methods for lowering humidity include installing an exhaust fan near the top of the tent; adjusting ventilation fans; opening windows; adding vents to walls, etc.; and lastly, running an air conditioner whenever necessary (when temperatures are over 85 degrees Fahrenheit
How to control high humidity in grow tent
- Find a location for your grow tent that has good air circulation and is not near any sources of humidity like a bathroom or kitchen
- Keep the door of the grow tent open as often as possible to allow fresh air in
- Make sure there’s enough ventilation at all times by installing a properly sized exhaust fan on your grow tent
- Place a dehumidifier in your grow tent to help control humidity levels, but make sure it uses semiconductor technology or silica crystals since humidifiers that use compressors are usually too powerful for a grow tent and they emit a lot of heat.
- Use fans to circulate air around your grow tent – they’re especially helpful when you’re using powerful lights during hot days
- Consider getting a humidistat for your home if you have central heating or cooling systems
What Should The Humidity Be in Your Grow Tent
For many types of plants, the ideal grow tent temperature is 62°F (17°C) – 87°F (31°C) at a humidity of 40 – 70%
What Causes High Humidity in a Grow Tent
Indoor gardeners know that high humidity can damage their plants, but what are the causes of it in a grow tent? There are a few main reasons for this.
The first is ineffective ventilation due to the lack of air circulation which is usually caused by an improperly sized exhaust fan.
The second reason is condensation on the walls and ceiling of the tent which happens when the walls of the grow tent are colder than the dew point in the grow tent.
Thirdly, poorly sealed hydroponic systems can raise the humidity in a grow tent when the water in the system evaporates and doesn’t recondense and return to the reservoir.
Lastly, excess transpiration can be caused by high-intensity lighting which can also lead to humidity building up in a grow tent.