Dehumidifiers

A dehumidifier can help you control the relative humidity of the air in your indoor grow room, keeping it from becoming too high. Humidity is best kept in check by hooking your dehumidifier to a humidity controller. Learn More
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what is the best grow room dehumidifier?

In our testing of grow room dehumidifiers, our staff has consistently found Quest dehumidifiers the most efficient in terms of energy usage (PPD per kWh) and build quality. Quest dehumidifiers come with a 5 year warranty and easily connect to common HVAC controllers, thermostats and humidistats. 

What size dehumidifier do i need for my grow room?

The best way to size your grow room dehumidifier is not by the number of lights you have, but instead how much water you're feeding per day to your plants. As a rule of thumb, if you feed 50 gallons to your plants at the time in the flowering period where the plants use the most water, you'll want to make sure you have about 90% of that total (45 gallons) available to extract via dehumidification. 

Let's run through the math on this example to convert it to pints per day (PPD), which is the unit of measure for most dehumidifiers in terms of output. There are 8 pints per gallon, so in this example we'll mutliply 45 gallons x 8 pints per gallon to get 360 PPD. For this example make sure your grow room has approximately 360 PPD to properly regulate relative humidity (RH). 

For an even more in-depth description of how to size dehumidifiers for your grow room, read our 'Best Grow Room Dehumidifiers' blog post.

Grow room Dehumidifiers

Federal health guidelines say that air maintained at 40 to 55 percent humidity is more healthful to both plants and people.

Running a dehumidifier in grow room environments helps to:

  • Maintain humidity at a desired level.
  • Eliminate musty odors.
  • Prevent the growth of mildew and molds.

Temperature, watering and ventilation all contribute to humidity levels of the air in your grow room. Obviously, hydroponics elevate humidity. These commercial grow room dehumidifiers help to monitor the conditions and maintain a proper moisture level once it is attained. The best grow room dehumidifier is one that is sized right for the space and its conditions.

Check these pages for dehumidifiers in a wide range of capacities and prices, including factory remanufactured remodels that carry a warranty and save you hundreds of dollars. We carry equipment from the best dehumidifier manufacturers, including Quest.

Grow room Humidity Controllers

For more precise, more efficient control, add a humidity controller. It continually takes humidity measurements and signals your dehumidifier to treat air to the proper level. Some humidity controllers also help to regulate room temperature.

Need Help Choosing a Dehumidifier for your indoor grow room?

Read Our Blog - Best Dehumidifiers for Grow Rooms & How To Calculate Dehumidification Needs